Dr. Hans-Joachim Grafe

Leibniz-Institute for Solid State- and Materials Research, IFW Dresden

Helmholtzstraße 20
01069 Dresden

Tel. +49 (0)351 4659239

Institute:  Institute for Solid State Research

Research Group: Magnetic Properties

Position: group leader

Research interests:

I first learned about nuclear magnetic resonance (NMR) in physics class at the Technical High School in Osnabrück. I was excited from the beginning that you can excite these tiny nuclear spins with radio waves and receive their signals to create images from the human body. The next time I encountered NMR was in the advanced practical course in solid state physics at the TU Braunschweig, led by Hans-Henning Klauß. Under his guidance I did my diploma thesis on "NMR measurements on the compound Sr14Cu24O41". Also Bernd Büchner made it possible for me to do my PhD thesis at the IFW Dresden and TU Dresden with this versatile investigation method, this time on high temperature superconductors and in collaboration with Nicholas Curro at the Los Alamos National Laboratory: "NMR studies of rare earth co-doped lanthanum cuprates". Since then I have remained connected to NMR to study solids whose properties such as high temperature superconductivity or quantum magnetism are now as interesting to me as the method itself. Recently, however, the further development of NMR has also become one of my tasks. In a collaboration with the IIN under direction of Oliver Schmidt we used self-assembled rolled-up microcoils to perform NMR on nanoliter-sized samples, and continue to work on their optimization.

Please contact me if you are interested to learn more about NMR and solid state physics, and want to do your thesis with NMR.

Journal Papers

F. Bougamha, S. Selter, Y. Shemerliuk, S. Aswartham, A. Benali, B. Büchner, H.-J. Grafe, A.P. Dioguardi
31P NMR investigation of quasi-two-dimensional magnetic correlations in T2P2S6 (T=Mn, Ni)
Physical Review B 105, 024410/1-12 (2022) URL

M. Iakovleva, T. Petersen, A. Alfonsov, Y. Skourski, H.-J. Grafe, E. Vavilova, R. Nath, L. Hozoi, V. Kataev
Static magnetic and ESR spectroscopic properties of the dimer-chain antiferromagnet BiCoPO5
Physical Review Materials 6, 094413/1-11 (2022) URL

A. Stepanjuga, R. Ray, M. Richter, S. Carrocci, S. Hampel, L. Galle, H. Grafe, M. Valldor
Metathesis as an alternative synthesis route to layered sulfides A(LiZn)S2 (A = alkali-metal) with unexpected colors
New Journal of Chemistry 46, 4900-4910 (2022) URL

A. Rietig, H. Grafe, J. Acker
New insights into boron species in acidic digestion solutions of boron-doped silicon
Journal of Analytical Atomic Spectrometry 36, 2492-2500 (2021) URL

P. Lepucki, A. Dioguardi, D. Karnaushenko, O.G. Schmidt, H. Grafe
The normalized limit of detection in NMR spectroscopy
Journal of Magnetic Resonance 332, 107077/1-8 (2021) URL

F. Scaravaggi, S. Sauerland, L. Wang, R. Kappenberger, P. Lepucki, A.P. Dioguardi, X. Hong, F. Caglieris, C. Wuttke, C. Hess, H.-J. Grafe, S. Aswartham, S. Wurmehl, R. Klingeler, A.U.B. Wolter, B. Büchner
Revisiting the phase diagram of LaFe1−xCoxAsO in single crystals by thermodynamic methods
Physical Review B 103, 174506/1-9 (2021) URL

P. Lepucki, R. Havemann, A.P. Dioguardi, F. Scaravaggi, A.U.B. Wolter, R. Kappenberger, S. Aswartham, S. Wurmehl, B. Büchner, H.-J. Grafe
Mapping out the spin fluctuations in Co-doped LaFeAsO single crystals by NMR
Physical Review B 103, L180506/1-6 (2021) URL

P. Lepucki, A.I. Egunov, M. Rosenkranz, R. Huber, A. Mirhajivarzaneh, D.D. Karnaushenko, A.P. Dioguardi, D. Karnaushenko, B. Büchner, O.G. Schmidt, H. Grafe
Self‐Assembled Rolled‐Up Microcoils for nL Microfluidics NMR Spectroscopy
Advanced Materials Technologies 6, 2000679/1-10 (2021) URL

S. Molatta, D. Opherden, J. Wosnitza, L. Opherden, Z.T. Zhang, T. Wolf, H. v. Löhneysen, R. Sarkar, P.K. Biswas, H.-J. Grafe, H. Kühne
Superconductivity of highly spin-polarized electrons in FeSe probed by 77Se NMR
Physical Review B 104, 014504/1-6 (2021) URL

X. Hong, F. Caglieris, R. Kappenberger, S. Wurmehl, S. Aswartham, F. Scaravaggi, P. Lepucki, A.U.B. Wolter-Giraud, H.-J. Grafe, B. Büchner, C. Hemker-Heß
Evolution of the Nematic Susceptibility in LaFe1−xCoxAsO
Physical Review Letters 125, 067001/1-7 (2020) URL

A.P. Dioguardi, S. Selter, U. Peeck, S. Aswartham, M.-I. Sturza, R. Murugesan, M.S. Eldeeb, L. Hozoi, B. Büchner, H.-J. Grafe
Quasi-two-dimensional magnetic correlations in Ni2P2S6 probed by 31P NMR
Physical Review B 102, 064429/1-16 (2020) URL

H. Grafe, P. Lepucki, M. Witschel, A. Dioguardi, R. Kappenberger, S. Aswartham, S. Wurmehl, B. Büchner
Unified phase diagram of F-doped LaFeAsO by means of NMR and NQR parameters
Physical Review B 101, 054519/1-12 (2020) URL

M. Moroni, G. Prando, S. Aswartham, I. Morozov, Z. Bukowski, B. Büchner, H. Grafe, P. Carretta
Charge and nematic orders in AFe2As2(A=Rb,Cs) superconductors
Physical Review B 99, 235147/1-7 (2019) URL

M. Iakovleva, O. Janson, H.-J. Grafe, A. Dioguardi, H. Maeter, N. Yeche, H. Klauss, G. Pascua, H. Luetkens, A. Möller, B. Büchner, V. Kataev, E. Vavilova
Ground state and low-temperature magnetism of the quasi-two-dimensional honeycomb compound InCu2/3V1/3O3
Physical Review B 100, 144442/1-14 (2019) URL

Z.T. Zhang, D. Dmytriieva, S. Molatta, J. Wosnitza, S. Khim, S. Gaß, A. Wolter-Giraud, S. Wurmehl, H. Grafe, H. Kuehne
Increasing stripe-type fluctuations in AFe2As2 (A=K, Rb, Cs) superconductors probed by 75As NMR spectroscopy
Physical Review B 97, 115110/1-5 (2018) URL

D. Karnaushenko, D. Karnaushenko, H. Grafe, V. Kataev, B. Büchner, O.G. Schmidt
Rolled-Up Self-Assembly of Compact Magnetic Inductors, Transformers, and Resonators
Advanced Electronic Materials 4, 1800298/1-7 (2018) URL

B. Valldor, D. Mikhailova, L. Giebeler, K.T. Lai, L. Spillecke, H. Grafe, B. Büchner
Synthesis, Characterization, and Electrochemistry of Layered Chalcogenides LiCuCh (Ch = Se, Te)
Inorganic Chemistry 57, 7201-7207 (2018) URL

R. Reinhold, U. Stoeck, H.-J. Grafe, D. Mikhailova, T. Jaumann, S. Oswald, S. Kaskel, L. Giebeler
Surface and Electrochemical Studies on Silicon Diphosphide as Easy-to-Handle Anode Material for Lithium-Based Batteries - the Phosphorus Path
ACS Applied Materials & Interfaces 10, 7096-7106 (2018) URL

R. Kappenberger, F. Hammerath, P. Rousse, M.A. Afrassa, M.H. Haghighi, S. Kamusella, G. Prando, G. Lamura, A. Wolter-Giraud, M. Moroni, S. Sanna, P. Carretta, C. Heß, H. Grafe, H.-H. Klauss, S. Wurmehl, B. Büchner
Impact of concomitant Y and Mn substitution on superconductivity in La1-yYyFe1-xMnxAsO0.89F0.11
Physical Review B 97, 054522/1-11 (2018) URL

M. Iakovleva, S. Fuchs, A. Alfonsov, H. Grafe, M. Vogl, S. Aswartham, S. Wurmehl, T. Dey, B. Büchner, E. Vavilova, V. Kataev
Static and dynamic magnetism of the Ir-based double perovskites La2BIrO6 (B =Co, Zn) probed by magnetic resonance spectroscopies
Physical Review B 98, 174401/1-12 (2018) URL

M. Iakovleva, S. Zimmermann, J. Zeisner, A. Alfonsov, H. Grafe, M. Valldor, E. Vavilova, B. Büchner, V. Kataev
Magnetic resonance spectroscopy on the spin-frustrated magnets YBaCo3MO7 (M=Al, Fe)
Physical Review B 96, 064417/1-11 (2017) URL

D. Pelc, H.-J. Grafe, G.D. Gu, M. Pozek
Cu nuclear magnetic resonance study of charge and spin stripe order in La1.875Ba0.125CuO4
Physical Review B 95, 054508/1-8 (2017) URL

Y. Utz, F. Hammerath, R. Kraus, T. Ritschel, J. Geck, L. Hozoi, J. van den Brink, A. Mohan, C. Heß, K. Karmakar, S. Singh, D. Bounoua, R. Saint-Martin, L. Pinsard-Gaudart, A. Revcolevschi, B. Büchner, H. Grafe
Effect of different in-chain impurities on the magnetic properties of the spin chain compound SrCuO2 probed by NMR
Physical Review B 96, 115135/1-12 (2017) URL

Y. Krupskaya, M. Schäpers, A. Wolter-Giraud, H. Grafe, E. Vavilova, A. Moeller, B. Büchner, V. Kataev
Magnetic Resonance Study of the Spin-1/2 Quantum Magnet BaAg2Cu[VO4]2
Zeitschrift für Physikalische Chemie 231, 759-775 (2017) URL

F. Hammerath, R. Sarkar, S. Kamusella, C. Baines, H.-H. Klauss, T. Dey, A. Maljuk, S. Gaß, A. Wolter-Giraud, H. Grafe, S. Wurmehl, B. Büchner
Diluted paramagnetic impurities in nonmagnetic Ba2YIrO6
Physical Review B 96, 165108/1-8 (2017) URL

H. Grafe, S. Nishimoto, M. Iakovleva, E. Vavilova, L. Spillecke, A. Alfonsov, M. Sturza, S. Wurmehl, H. Nojiri, H. Rosner, J. Richter, U. Rößler, S. Drechsler, V. Kataev, B. Büchner
Signatures of a magnetic fieldinduced unconventional nematic liquid in the frustrated and anisotropic spin-chain cuprate LiCuSbO4
Scientific Reports 7, 6720/1-16 (2017) URL

C. Heß, H. Grafe, A. Kondrat, G. Lang, F. Hammerath, L. Wang, R. Klingeler, G. Behr, B. Büchner
Nematicity in LaFeAsO1-xFx
Physica Status Solidi B-Basic Solid State Physics 254, 1600214/1-8 (2017) URL

P.K. Nag, R. Schlegel, D. Baumann, H.-J. Grafe, R. Beck, S. Wurmehl, B. Büchner, C. Hess
Two distinct superconducting phases in LiFeAs
Scientific Reports 6, 27926/1-7 (2016) URL

K. Manna, R. Sarkar, S. Fuchs, Y.A. Onykiienko, A.K. Bera, G. Aslan Cansever, S. Kamusella, A. Maljuk, C.G.F. Blum, L.T. Corredor, A.U.B. Wolter, S.M. Yusuf, M. Frontzek, L. Keller, M. Iakovleva, E. Vavilova, H.-J. Grafe, V. Kataev, H.-H. Klauss, D.S. Inosov, S. Wurmehl, B. Büchner
Noncollinear antiferromagnetism of coupled spins and pseudospins in the double perovskite La2CuIrO6
Physical Review B 94, 144437/1-16 (2016) URL

D. Pelc, M. Vuckovic, H.-J. Grafe, S.-H. Baek, M. Pozek
Unconventional charge order in a co-doped high-Tc superconductor
Nature Communications 7, 12775/1-7 (2016) URL

M.F. Iakovleva, E.L. Vavilova, H.-J. Grafe, A. Maljuk, S. Wurmehl, B. Büchner, V. Kataev
Spin Dynamics and Ground State of the Frustrated Diamond Lattice Magnet CoAl2O4 as seen by 27Al NMR
Applied Magnetic Resonance 47, 727-735 (2016) URL

S.J. Singh, U. Graefe, R. Beck, A.U.B. Wolter, H. Grafe, C. Hess, S. Wurmehl, B. Büchner
Physical properties optimization of polycrystalline LiFeAs
Physica C 529, 8-20 (2016) URL

G. Lang, L. Veyrat, U. Graefe, F. Hammerath, D. Paar, G. Behr, S. Wurmehl, H.J. Grafe
Spatial competition of the ground states in 1111 iron pnictides
Physical Review B 94, 014514/1-17 (2016) URL

A. Surrey, C. Bonatto Minella, N. Fechler, M. Antonietti, H.-J. Grafe, L. Schultz, B. Rellinghaus
Improved hydrogen storage properties of LiBH4 via nanoconfinement in micro- and mesoporous aerogel-like carbon
International Journal of Hydrogen Energy 41, 5540-5548 (2016) URL

H.-J. Grafe, W. Loeser, S. Schmitz, M. Sakaliyska, S. Wurmehl, S. Eisert, B. Reichenbach, J. Acker, A. Rietig, J. Ducke, T. Mueller
NMR investigation of boron impurities in refined metallurgical grade silicon
Physica Status Solidi A 212, 2031-2036 (2015) URL

X. Lu, J. Deng, W. Si, X. Liu, B. Liu, L. Liu, S. Oswald, S. Baunack, H.J. Grafe, C. Yan, O.G. Schmidt
High-Performance Li-O2 Batteries with Trilayered Pd/MnOx/Pd Nanomembranes
Advanced Science 2, 1500113/1-6 (2015) URL

A.P. Dioguardi, M.M. Lawson, B.T. Bush, J. Crocker, K.R. Shirer, D.M. Nisson, T. Kissikov, S. Ran, S.L. Bud'ko, P.C. Canfield, S. Yuan, P.L. Kuhns, A.P. Reyes, H.-J. Grafe, N.J. Curro
NMR evidence for inhomogeneous glassy behavior driven by nematic fluctuations in iron arsenide superconductors
Physical Review B 92, 165116/1-8 (2015) URL

Y. Utz, F. Hammerath, S. Nishimoto, C. Hess, N. Sekhar Beesetty, R. Saint-Martin, A. Revcolevschi, B. Büchner, H.-J. Grafe
Suppression of the impurity-induced local magnetism by the opening of a spin pseudogap in Ni-doped Sr2CuO3
Physical Review B 92, 060405/1-5 (2015) URL

S.-H. Baek, Y. Utz, M. Huecker, G.D. Gu, B. Büchner, H.-J. Grafe
Magnetic field induced anisotropy of La139 spin-lattice relaxation rates in stripe ordered La1.875Ba0.125CuO4
Physical Review B 92, 155144/1-6 (2015) URL

M. Iakovleva, E. Vavilova, H.-J. Grafe, S. Zimmermann, A. Alfonsov, H. Luetkens, H.-H. Klauss, A. Maljuk, S. Wurmehl, B. Büchner, V. Kataev
Ground state and low-energy magnetic dynamics in the frustrated magnet CoAl2O4 as revealed by local spin probes
Physical Review B 91, 144419/1-11 (2015) URL

K. Baroudi, C. Yim, H. Wu, Q. Huang, J.H. Roudebush, E. Vavilova, H.-J. Grafe, V. Kataev, B. Büchner, H. Ji, C. Kuo, Z. Hu, T.-W. Pi, C. Pao, J. Lee, D. Mikhailova, L.H. Tjeng, R.J. Cava
Structure and propertie sof alpha--NaFeO2-type ternary sodium iridates
Journal of Solid State Chemistry 210, 195-205 (2014) URL

F. Hammerath, E.M. Bruening, S. Sanna, Y. Utz, N.S. Beesetty, R. Saint-Martin, A. Revcolevschi, C. Hess, B. Büchner, H.-J. Grafe
Spin gap in the single spin-1/2 chain cuprate Sr1.9Ca0.1CuO3
Physical Review B 89, 184410/1-5 (2014) URL

S.-H. Baek, L.M. Reinold, M. Graczyk-Zajacb, R. Riedel, F. Hammerath, B. Büchner, H.-J. Grafe
Lithium dynamics in carbon-rich polymer-derived SiCN ceramics probed by nuclear magnetic resonance
Journal of Power Sources 253, 342-348 (2014) URL

S.-H. Baek, R. Klingeler, C. Neef, C. Koo, B. Büchner, H.-J. Grafe
Unusual spin fluctuations and magnetic frustration in olivine and non-olivine LiCoPO4 detected by 31P and 7Li nuclear magnetic resonance
Physical Review B 89, 134424/1-6 (2014) URL

K. Wang, A. Maljuk, C.G.F. Blum, T. Kolb, C. Jaehne, C. Neef, H.-J. Grafe, L. Giebeler, H. Wadepohl, H.-P. Meyer, S. Wurmehl, R. Klingeler
Growth, characterization, and magnetic properties of a Li(Mn,Ni)PO4 single crystal
Journal of Crystal Growth 386, 16-21 (2014) URL

H.-J. Grafe, U. Graefe, A.P. Dioguardi, N.J. Curro, S. Aswartham, S. Wurmehl, B. Büchner
Identical spin fluctuations in Cu- and Co- doped BaFe2As2 independent of electron doping
Physical Review B 90, 094519/1-8 (2014) URL

G. Prando, S. Sanna, G. Lamura, T. Shiroka, M. Tropeano, A. Palenzona, H.-J. Grafe, B. Büchner, P. Carretta, R. De Renzi
Phase separation at the magnetic–superconducting transition in La0.7Y0.3FeAsO1-xFx
Physica Status Solidi B-Basic Solid State Physics 250, 599-602 (2013) URL

C. Rudisch, H.-J. Grafe, J. Geck, S. Partzsch, M. v. Zimmermann, N. Wizent, R. Klingeler, B. Büchner
Coupling of Li motion and structural distortions in olivine LiMnPO4 from 7Li and 31P NMR
Physical Review B 88, 054303/1-9 (2013) URL

G. Prando, P. Bonfa, G. Profeta, R. Khasanov, F. Bernardini, M. Mazzani, E.M. Bruening, A. Pal, V.P.S. Awana, H.-J. Grafe, B. Büchner, R. De Renzi, P. Carretta, S. Sanna
Common effect of chemical and external pressures on the magnetic properties of RCoPO (R = La, Pr)
Physical Review B 87, 064401/1-11 (2013) URL

S.-H. Baek, L. Harnagea, S. Wurmehl, B. Büchner, H.-J. Grafe
Anomalous superconducting state in LiFeAs implied by the 75As Knight shift measurement
Journal of Physics: Condensed Matter 25, 162204/1-5 (2013) URL

F. Hammerath, U. Graefe, T. Kühne, H. Kuehne, P.L. Kuhns, A.P. Reyes, G. Lang, S. Wurmehl, B. Büchner, P. Carretta, H.-J. Grafe
Progressive slowing down of spin fluctuations in underdoped LaFeAsO1-xFx
Physical Review B 88, 104503/1-9 (2013) URL

S.-H. Baek, T. Loew, V. Hinkov, C.T. Lin, B. Keimer, B. Büchner, H.-J. Grafe
Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single crystals revealed by 63Cu NMR
Physical Review B 86, 220504(R)/ 1-5 (2012) URL

G. Prando, P. Carretta, R. De Renzi, S. Sanna, H.-J. Grafe, S. Wurmehl, B. Büchner
Ac susceptibility investigation of vortex dynamics in nearly optimally doped RFeAsO1-xFx superconductors (R = La, Ce, Sm)
Physical Review B 85, 144522/1-9 (2012) URL

N. Qureshi, P. Steffens, Y. Drees, A.C. Komarek, D. Lamago, Y. Sidis, L. Harnagea, H.-J. Grafe, S. Wurmehl, B. Büchner, M. Braden
Inelastic neutron-scattering measurements of incommensurate magnetic excitations on superconducting LiFeAs single crystals
Physical Review Letters 108, 117001/1-5 (2012) URL

S.-H. Baek, H.-J. Grafe, F. Hammerath, M. Fuchs, C. Rudisch, L. Harnagea, S. Aswartham, S. Wurmehl, J. van den Brink, B. Büchner
75As NMR-NQR study in superconducting LiFeAs
The European Physical Journal B 85, 159/1-10 (2012) URL

S.-H. Baek, K.-Y. Choi, H. Berger, B. Büchner, H.-J. Grafe
Persistence of singlet fluctuations in the coupled spin tetrahedra system Cu2Te2O5Br2 revealed by high-field magnetization, 79Br NQR, and 125Te NMR
Physical Review B 86, 180405(R)/ 1-4 (2012) URL

H.-J. Grafe
Nuclear magnetic and quadrupole resonance studies of the stripes materials
Physica C 481, 93-100 (2012) URL

S.-H. Baek, A. Erb, B. Büchner, H.-J. Grafe
139La NMR investigation in underdoped La1.93Sr0.07CuO4
Physical Review B 85, 184508/1-6 (2012) URL

J. Crocker, A.P. Dioguardi, N. Roberts-Warren, A.C. Shockley, H.-J. Grafe, Z. Xu, J. Wen, G. Gu, N.J. Curro
NMR studies of pseudogap and electronic inhomogeneity in Bi2Sr2CaCu2O8+δ
Physical Review B 84, 224502/1-8 (2011) URL

V. Grinenko, K. Kikoin, S.-L. Drechsler, G. Fuchs, K. Nenkov, S. Wurmehl, F. Hammerath, G. Lang, H.-J. Grafe, B. Holzapfel, J. van den Brink, B. Büchner, L. Schultz
As vacancies, local moments, and Pauli limiting in LaFeAs1-deltaO0.9F0.1 superconductors
Physical Review B 84, 134516/1-10 (2011) URL

S.-H. Baek, H.-J. Grafe, L. Harnagea, S. Singh, S. Wurmehl, B. Büchner
Pseudogap-like phase in Ca(Fe(1-x)Co(x))(2)As(2) revealed by (75)As NQR
Physical Review B 84, 094510/1-5 (2011) URL

F. Hammerath, S. Nishimoto, H.-J. Grafe, A.U.B. Wolter, V. Kataev, P. Ribeiro, C. Hess, S.-L. Drechsler, B. Büchner
Spin gap in the zigzag spin-1/2 chain cuprate Sr0.9Ca0.1CuO2
Physical Review Letters 107, 017203/1-4 (2011) URL

I. Morozov, A. Boltalin, O. Volkova, A. Vasiliev, O. Kataeva, U. Stockert, M. Abdel-Hafiez, D. Bombor, A. Bachmann, Harnage L., M. Fuchs, H.-J. Grafe, G. Behr, R. Klingeler, S. Borisenko, C. Hess, S. Wurmehl, B. Büchner
Single crystal growth and characterization of superconducting LiFeAs
Crystal Growth & Design 10, 4429-4432 (2010) URL

G. Fuchs, S.-L. Drechsler, N. Kozlova, M. Bartkowiak, G. Behr, K. Nenkov, H.-H. Klauss, J. Freudenberger, M. Knupfer, F. Hammerath, G. Lang, H.-J. Grafe, B. Büchner, L. Schultz
Evidence for Pauli-limiting behaviour at high fields and enhanced upper critical fields near T_c in several disordered FeAs based superconductors
Physica C 470, S288-S290 (2010) URL

G. Lang, H.-J. Grafe, F. Hammerath, K. Manthey, D. Paar, G. Behr, J. Werner, J. Hamann-Borrero, B. Büchner
Probing of the charge distribution in iron pnictides
Physica C 470, S454-S455 (2010) URL

R. Klingeler, N. Leps, I. Hellmann, A. Popa, U. Stockert, C. Hess, V. Kataev, H.-J. Grafe, F. Hammerath, G. Lang, S. Wurmehl, G. Behr, L. Harnagea, S. Singh, B. Büchner
Local antiferromagnetic correlations in the iron pnictide superconductors LaFeAsO1-xFx and Ca(Fe1-xCox)2As2 as seen via normal-state susceptibility
Physical Review B 81, 024506/1-5 (2010) URL

F. Hammerath, S.-L. Drechsler, H.-J. Grafe, G. Lang, G. Fuchs, G. Behr, I. Eremin, M.M. Korshunov, B. Büchner
Unusual disorder effects in superconducting LaFeAs1-δO0.9F0.1 as revealed by 75As NMR spectroscopy
Physical Review B 81, 140504(R)/1-4 (2010) URL

H.-J. Grafe, N.J. Curro, B.L. Young, A. Vyalikh, J. Vavilova, G.D. Gu, M. Huecker, B. Büchner
Charge order and low frequency spin dynamics in lanthanum cuprates revealed by nuclear magnetic resonance
The European Physical Journal Special Topics 188, 89-101 (2010) URL

D. Paar, H.-J. Grafe, G. Lang, F. Hammerath, K. Manthey, G. Behr, J. Werner, B. Büchner
NMR study of the electronic properties of superconducting LaO0.9F0.1FeAs
Physica C 470, S468-S469 (2010) URL

G. Lang, H.-J. Grafe, D. Paar, F. Hammerath, K. Manthey, G. Behr, J. Werner, B. Büchner
Nanoscale electronic order in iron pnictides
Physical Review Letters 104, 097001/1-4 (2010) URL

H.-J. Grafe, G. Lang, F. Hammerath, D. Paar, K. Manthey, K. Koch, H. Rosner, N.J. Curro, G. Behr, J. Werner, N. Leps, R. Klingeler, H.-H. Klauss, F. J. Litterst, B. Büchner
Electronic properties of LaO1-xFxFeAs in the normal state probed by NMR/NQR
New Journal of Physics 11, 035002/1-14 (2009) URL

H.-J. Grafe, F. Hammerath, A. Vyalikh, G. Urbanik, V. Kataev, T. Wolf, G. Khaliullin, B. Büchner
Contrasting spin dynamics in Zn- and Ni-doped NdBa2Cu3O6+y single crystals from Cu nuclear quadrupole resonance: Evidence for correlations between antiferromagnetism and pseudogap effects
Physical Review B 77, 014522/1-5 (2008) URL

A. Vyalikh, A. Wolter, S. Hampel, D. Haase, M. Ritschel, A. Leonhardt, H.-J. Grafe, A. Taylor, K. Kraemer, B. Büchner, R. Klingeler
A carbon-wrapped nanoscaled thermometer for temperature control in biological environments
Nanomedicine 3, 321-327 (2008) URL

H.-J. Grafe, D. Paar, G. Lang, N.J. Curro, G. Behr, J. Werner, J. Hamann-Borrero, C. Hess, N. Leps, R. Klingeler, B. Büchner
75As NMR studies of superconducting LaFeAsO0.9F0.1
Physical Review Letters 101, 047003/1-4 (2008) URL

H.-J. Grafe, F. Hammerath, T. Wolf, B. Büchner
Cu nuclear quadrupole resonance study of NdBa2(Cu,Zn,Ni)3O7-delta
Physica C 460-462, 896-897 (2007) URL

A. Vyalikh, R. Klingeler, S. Hampel, D. Haase, M. Ritschel, A. Leonhardt, E. Borowiak-Palen, M. Ruemmeli, A. Bachmatiuk, R.J. Kalenczuk, H.-J. Grafe, B. Büchner
A nanoscaled contactless thermometer for biological systems
Physica Status Solidi B-Basic Solid State Physics 244, 4092-4096 (2007) URL

H.-J. Grafe, N.J. Curro, M. Huecker, B. Buechner
Nuclear-Magnetic-Resonance Evidence for Charge Inhomogeneity in Stripe Ordered La1.8-xEu0.2SrxCuO4
Physical Review Letters 96, 017002/1-4 (2006) URL

Invited Talks

F. Bougamha, A.P. Dioguardi, H. Grafe, S. Selter, Y. Shemerliuk, S. Aswartham, M.I. Sturza, C.E. Agrapidis, S. Nishimoto, O. Janson, R. Murugesan, M.S. Eldeeb, L. Hozoi, B. Büchner, J. van den Brink
2D magnetic correlations in (Ni,Mn)2P2S6 probed by 31P NMR
Seminar | University of Warsaw, Institute of Theoretical Physics
Warsaw, Poland, 26.11.2019

H.-J. Grafe
Spin chains probed by Nuclear Magnetic Resonance: I. SrCuO2 and Sr2CuO3 II. LiCuSbO4
Seminar talk, University of Zagreb, Zagreb/ Croatia, 18.5.17

H.-J. Grafe
NMR and NQR on iron pnictide superconductors
2nd summer school on iron pnictides of the SPP1458, Storkow (Mark)/ Germany, 4.-8.4.16

H.-J. Grafe
Impurity effects in S=1/2 Heisenberg spin chains as probed by nuclear magnetic resonance
Seminar talk, Ecole Superieure de Physique et de Chimie Industrielles, ESPCI, 10 Rue Vauquelin, 75005 Paris/ France, 8.12.16

H.-J. Grafe, F. Hammerath
Impurity effects in S=1/2 Heisenberg spin chains as probed by nuclear magnetic resonance
7th International Conference The New Generation in Strongly Correlated Electrons Systems 2016, International Centre for Theoretical Physics (ICTP) in Trieste/ Italy, 26.9.-30.9.16

H.-J. Grafe
Determination of the local structure of high temperature superconductors by NMR and NQR
Seminar talk, Institut fuer Strukturphysik, TU Dresden, Dresden/ Germany, 12.5.15

H.-J. Grafe
Spin fluctuations and inhomogeneities in iron pnictide superconductors as probed by NMR and NQR
Modern Development of Magnetic Resonance, Kazan/ Russia, 22.-26.9.15

S. Wurmehl, L. Harnagea, S. Aswartham, I. Morozov, A. Wolter-Giraud, H.-J. Grafe, F. Steckel , U. Graefe, D. Bombor, C. Hess, B. Borisenko, B. Büchner
Crystal growth and properties of pnictide superconductors
International Conference on Magnetic and Superconducting Materials (MSM), Antalya/ Turkey, 30.4.-3.5.15

H.-J. Grafe
Nuclear Magnetic Resonance in unconventional superconductors - and the role of inhomogeneites
Seminar talk, 3. Physikalisches Institut, Universitaet Stuttgart, Stuttgart/ Germany, 15.7.15

S. Wurmehl, C. Hess, H.-J. Grafe, V. Kataev, S. Borisenko, L. Harnegea, S. Aswartham, R. Beck, I. Morozov, F. Hammerath, F. Steckel, D. Bombor, D. Evtushinskiy, B. Büchner
Pnictide superconductors-a crystal growth perspective
14th International Union of Materials Research Societies-International Conference on Advanced Materials 2015 (IUMRS-ICAM), Jeju Island/ South Korea, 25.-29.10.15

H.-J. Grafe
Nuclear Magnetic Resonance on S = 1/2 Heisenberg Spin Chains under the Impact of Impurities
Seminar talk, University of California, Davis/ USA, 24.4.14

H.-J. Grafe
Identical spin fluctuations in Cu- and Co-doped BaFe2As2
Workshop ''NMR, mySR, Moessbauer spectroscopies in the study of Fe-based and other unconventional high-Tc superconductors'' Dresden/ Germany, 17.7.14

H.-J. Grafe
Investigation of Li-ion battery materials by NMR
Seminar talk, Technische Universitaet Darmstadt, Darmstadt/ Germany, 18.6.14

H.-J. Grafe
New NMR results in the prototypical high temperature superconductors La2-xSrxCuO4 and YBa2Cu3Oy
Seminarvortrag im Rahmen des SoleNeMaR - Projektes, Universitaet Zagreb/ Kroatien, 25.-29.6.12

H.-J. Grafe
Nuclear magnetic resonance study of pure and Ni/Co doped LiFeAs
477. WE-Heraeus-Seminar ''Unconventional Superconductivity'', Bad Honnef, 11.-13.4.11

H.-J. Grafe, G. Lang, F. Hammerath, S.-H. Beak, B. Büchner
NMR studies of the new iron pnictide superconductors
Recent Advances in Broad-band Solid-state NMR of Correlated Electronic Systems, Trogir/ Kroatien, 5.-10.9.10

H.-J. Grafe, G. Lang, F. Hammerath, K. Manthey, M. Fuchs, D. Paar, B. Büchner
NMR studies of the new iron pnictide superconductors
CIMTEC 2010, 5th Forum on New Materials, Montecatini Terme/ Italien, 13.-18.6.10

H.-J. Grafe, G. Lang, F. Hammerath, K. Manthey, D. Paar, B. Büchner
NMR studies of superconducting LaO1-xFxFeAs
Kick-off meeting of the SOLeNeMaR EU project of the Department of Physics, University of Zagreb/ Croatia, 19.-20.3.09

G. Lang, H.-J. Grafe, D. Paar, A. Wolter, F. Hammerath, K. Manthey, N. Curro, R. Klingeler, N. Leps, C. Hess, A. Kondrat, J.E. Hamann Borrero, J. Werner, A. Koehler, B. Büchner
Electronic properties of iron pnictides as seen by NMR
International Conference on FeAs High Tc Superconducting Multilayers and Related Phenomena, Rom/ Italien, 9.-13.12.08

H.-J. Grafe, F. Hammerath, D. Paar, G. Urbanik, V. Kataev, T. Wolf, G. Khaliullin, B. Büchner
Nuclear magnetic resonance evidence for correlations between antiferromagnetism and pseudogap effects in Zn- and Ni-doped (Eu,Nd)Ba2Cu3O6+y single crystals
International Conference Stripes'08, Erice, Sizilien/ Italy, 26.7.-1.8.08

H.-J. Grafe
Local fluctuating charge order in the stripe ground state of La(1,8-x)Eu0,2SrxCuO4
NMR-Seminar der NMR-Arbeitsgruppen im Raum Dresden, Leibniz-Institut fuer Polymerforschung Dresden, 29.1.04