AG Festkörperphysik (Chair for Solid State Physics)
Table of contents
Professur für Festkörperphysik
PD Dr. Andy Thomas and Dr. Helena Reichlova
Acting chair PD Dr. Andy Thomas and Eleonore Trefftz guest professor Dr. Helena Reichlova
The Chair for Solid State Physics continues to address the fabrication and the investigation of multifunctional magnetic heterostructures and devices. We use magneto-transport and spin-caloritronic measurements, as well as spin dynamics (magnetic resonance) experiments, to understand the properties of thin films with complex magnetic structures or interesting topological features.
Important Research Foci
In some more detail, we investigate spin-dependent transport (anisotropic magnetoresistance, anomalous Hall effect, topological Hall effect) as well as pure spin currents (spin Hall magnetoresistance, spin Seebeck effect, spin Nernst effect, spin pumping, etc.) in solids. Magnetic systems with non-trivial spin texture, e.g. caused by canted magnetic sublattices, magnetic frustration effects, or topological magnetic structures such as skyrmions, currently are of particular interest for these experiments.
Complementarily, we study pure magnon currents in nanostructures of metals and magnetic insulators. These experiments enable the determination of magnon scattering lengths and allow realizing novel magnetic logic components.
As a second major focus, the group investigates the thermodynamic properties of bulk magnetic materials (magnetostriction, magnetization, susceptibility). The focus is on the magnetoelastic behavior of compounds with 3d or rare earth elements. These investigations shed light on the influence of lattice distortions on the electronic properties. Recent work again deals with frustrated spin systems and topological effects. The measurements take place up to highest magnetic fields (100 T pulsed) or very low temperatures (10 mK).
People
|
Name |
Function |
Room REC- |
Phone +49- |
| Sebastian Beckert | doctoral student | D 209 | 42120 |
| Ruben Dario Gonzalez Betancourt | master student | D 209 | 42120 |
| Mathias Dörr, PD Dr. |
staff scientist |
D 208 |
35036 |
| Sergey Granovsky, Dr. | engineer | D 201 | 35410 |
| Justus Grumbach | master student | D 209 | 37833 |
| Dominik Kriegner, Dr. | postdoc | D 211 | 34881 |
| Helena Reichlova, Dr. | guest professor | D 201 | 35410 |
| Daniel Scheffler | doctoral student | D 203 | 37833 |
| Andy Thomas, PD Dr. | associate professor | D 207 | 36055 |
| Elke Wachsmuth | secretary | D 206 | 34671 |
Recent Publications
2022
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Identifying the octupole Antiferromagnetic domain orientation in Mn3NiN by scanning Anomalous Nernst Effect microscopy
F. Johnson , J. Kimák , J. Zemen, Z. Šobáň , E. Schmoranzerová , J. Godinho, P. Němec , S. Beckert, H. Reichlova, D. Boldrin, J. Wunderlich and L.F. Cohen
APL 120 232402 (2022) -
Atomic layer deposition of yttrium iron garnet thin films
M. Lammel, D. Scheffler, D. Pohl, P. Swekis, S. Reitzig, H. Reichlova, R. Schlitz, K. Geishendorf, L. Siegl, B. Rellinghaus, L. M. Eng, K. Nielsch, S. T. B. Goennenwein, A. Thomas
Phys. Rev. Mat. 6 044411 (2022) -
Atomically sharp domain walls in an antiferromagnet
F. Krizek, S. Reimers, Z. Kašpar, A. Marmodoro, J. Michalička, O. Man, A. Edström, O. J Amin, K. W Edmonds, R. P Campion, F. Maccherozzi, S. S Dhesi, J. Zubáč, D. Kriegner, D. Carbone, J. Železný, K. Výborný, K. Olejník, V. Novák, J. Rusz, J.-C. Idrobo, P. Wadley, T. Jungwirth
Science advances 8 (13), eabn3535, (2022) - Defect-driven antiferromagnetic domain walls in CuMnAs films
S. Reimers, D. Kriegner, O. Gomonay, D. Carbone, F. Krizek, V. Novák, R. P Campion, F. Maccherozzi, A. Björling, O. J Amin, L. X Barton, S. F Poole, K. A Omari, J. Michalička, O.j Man, J. Sinova, T. Jungwirth, P. Wadley, S. S Dhesi, K. W Edmonds
Nature Communications volume 13, Article number: 724 (2022)
2021
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Strain-induced switching between noncollinear and collinear spin configuration in
magnetic Mn5 Ge3 films
Y. Xie, Y. Yuan, M. Birowska, C. Zhang, L. Cao, M. Wang, J. Grenzer, D. Kriegner, P. Doležal, Y.-J. Zeng, X. Zhang, M. Helm, S. Zhou, S. Prucnal
Phys. Rev. B 104, (2021) 064416 -
Role of Magnetic Exchange Interactions in Chiral-Type Hall Effects of
Epitaxial MnxPtSn Films
P. Swekis, J. Gayles, D. Kriegner, G. Fecher, Y. Sun, S. Goennenwein, C. Felser, A. Markou
ACS Applied Electronic Materials 3, 1323–1333 (2021) -
Anisotropic magnetothermal transport in Co2MnGa thin films
P. Ritzinger, H. Reichlova, D. Kriegner, A. Markou, R. Schlitz, M. Lammel, D. Scheffler, G. H. Park, A. Thomas, P. Streda, C. Felser, S.T.B. Goennenwein, K. Vyborny
Phys. Rev. B. 104 (2021) 094406 - Non-local magnon based transport in yttrium iron garnet/ platinum heterostructures at high temperatures
R. Schlitz, S. Granovsky, D. Pohl, A. Thomas, B. Rellinghaus, S.T.B. Goennenwein
Phys. Rev. B. 103 (2021) 214434 - Nonreciprocity of spin waves in magnetic nanotubes with helical equilibrium magnetization
M.M. Salazar-Cardona, L. Körber, H. Schultheiss, K. Lenz, A. Thomas, K. Nielsch, A. Kakay, J.A. Otalora
Appl. Phys. Lett. 118 (2021) 262411
2020
- Twin Domain Structure in Magnetically Doped Bi2Se3 Topological Insulator
J. Šebesta, K. Carva, D. Kriegner, and J. Honolka
Nanomaterials 10 (2020) 2059 - X-ray diffraction reveals the amount of strain and homogeneity of extremely bent single nanowires
A. Davtyan, D. Kriegner, V. Holý, A. AlHassan, R. B. Lewis, S. McDermott, L. Geelhaar, D. Bahrami, T. Anjum, Z. Ren, C. Richter, D. Novikov, J. Müller, B. Butz, and U. Pietsch
Journal of Applied Crystallography 53, 1310–1320 (2020) - Spin Current in an Antiferromagnet is Coherent
H. Reichlova, R. Schlitz, Sebastian T.B. Goennenwein
Physics 13, (2020) 83 - Magneto-Seebeck microscopy of domain switching in collinear antiferromagnet CuMnAs
T. Janda, J. Godinho, T. Ostatnicky, E. Pfitzner, G. Ulrich, A. Hoehl, S. Reimers, Z. Šobáň, T. Metzger, H. Reichlová, V. Novák, R. P. Campion, J. Heberle, P. Wadley, K. W. Edmonds, O. J. Amin, J. S. Chauhan, S. S. Dhesi, F. Maccherozzi, R. M. Otxoa, P. E. Roy, K. Olejník, P. Němec, T. Jungwirth, B. Kaestner, and J. Wunderlich
Phys. Rev. Mat. 4 (2020) 094413 - The impact of metallic contacts on spin-polarized photocurrents in topological insulator Bi2Se3 nanowires
N. Meyer, K. Geishendorf, J. Walowski, A. Thomas, M. Münzenberg
Appl. Phys. Lett. 117 (2020) 262401 - Fast fourier transform and multi-Gaussian fitting of XRR data to determine the thickness of ALD grown thin films within the initial growth regime
M. Lammel, K. Geishendorf, M.A. Choffel, D.M. Hamann, D.C. Johnson, K. Nielsch, A. Thomas
Appl. Phys. Lett. 117 (2020) 213106 - Thickness dependence of the anomalous Nernst effect and the Mott relation of Weyl semimetal Co2MnGa thin films
G.-H. Park, H. Reichlova, R. Schlitz, M. Lammel, A. Markou, P. Swekis, P. Ritzinger, D. Kriegner, J. Noky, J. Gayles, Y. Sun, C. Felser, K. Nielsch, S. T. B. Goennenwein, A. Thomas
Physical Review B 101, 060406(R) (2020). -
Large Spin Hall Magnetoresistance in Antiferromagnetic α -Fe2O3/Pt Heterostructures
J. Fischer, M. Althammer, N. Vlietstra, H. Huebl, S. T. B. Goennenwein, R. Gross, S. Geprägs, M. Opel
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Signatures of the Magnetic Entropy in the Thermopower Signals in Nanoribbons of the Magnetic Weyl Semimetal Co3Sn2S2
K. Geishendorf, P. Vir, C. Shekhar, C. Felser, J. I. Facio, J. van den Brink, K. Nielsch, A. Thomas, S. T. B. Goennenwein
2019
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Imaging and writing magnetic domains in the non-collinear antiferromagnet Mn3Sn
H. Reichlova, T. Janda, J. Godinho, A. Markou, D. Kriegner, R. Schlitz, J. Zelezny, Z. Soban, M. Bejanaro, H. Schultheiss, P. Nemec, T. Jungwirth, C. Felser, J. Wunderlich, S. T. B. Goennenwein
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Exchange-Enhanced Ultrastrong Magnon-Magnon Coupling in a Compensated Ferrimagnet
L. Liensberger, A. Kamra, H. Maier-Flaig, S. Gepraegs, A. Erb, S. T. B. Goennenwein, R. Gross, W. Belzig, H. Huebl, M. Weiler
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Anomalous spin Hall angle of a metallic ferromagnet determined by a multiterminal spin injection/detection device
T. Wimmer, B. Coester, S. Gepraegs, R. Gross, S. T. B. Goennenwein, H. Huebl, M. Althammer
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Towards Oxide Electronics: a Roadmap
M. Colla, J. Fontcuberta, M. Althammer, M. Bibes, H. Boschker, A. Calleja, G. Cheng, M. Cuoco, R. Dittmann, B. Dkhil, I. El Baggari, M. Fanciulli, I. Fina, E. Fortunato, C. Frontera, S. Fujita, V. Garcia, S.T.B. Goennenwein, C.-G. Granqvist, J. Grollier, R. Gross, A. Hagfeldt, G. Herranz, K. Hono, E. Houwman, M. Huijben, A. Kalaboukhov, D.J. Keeble, G. Koster, L. F. Kourkoutis, J. Levy, M. Lira-Cantu, J. L. MacManus-Driscoll, J. Mannhart, R. Martins, S. Menzel, T. Mikolajick, M. Napari, M. D. Nguyen, G. Niklasson, C. Paillard, S. Panigrahi, G. Rijnders, F. Sánchez, P. Sanchis, S. Sanna, D. G. Schlom, U. Schroeder, K. M. Shen, A. Siemon, M. Spreitzer, H. Sukegawa, R. Tamayo, J. van den Brink, N. Pryds, F. Miletto Granozio
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Spin Hall magnetoresistance in heterostructures consisting of noncrystalline paramagnetic YIG and Pt
M. Lammel, R. Schlitz, K. Geishendorf, D. Makarov, T. Kosub, S. Fabretti, H. Reichlova,
R. Huebner, K. Nielsch, A. Thomas, S. T. B. Goennenwein -
Focused ion beam modification of non-local magnon-based transport in yttrium iron garnet/platinum heterostructures
R. Schlitz, T. Helm, M. Lammel, K. Nielsch, A. Erbe, S. T. B. Goennenwein
Applied Physics Letters 114, 252401 (2019). -
All Electrical Access to Topological Transport Features in Mn1.8PtSn Films
R. Schlitz, P. Swekis, A. Markou, H. Reichlova, M. Lammel, J. Gayles, A. Thomas, K. Nielsch, C. Felser, S. T. B. Goennenwein
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Magnetoresistance and anomalous Hall effect in micro-ribbons of the magnetic Weyl semimetal Co3Sn2S2
K. Geishendorf, R. Schlitz, P. Vir, C. Shekhar, C. Felser, K. Nielsch, S. T. B. Goennenwein, A. Thomas
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Topological Hall effect in thin films of Mn1.5PtSn
P. Swekis, A. Markou, D. Kriegner, J. Gayles, R. Schlitz, W. Schnelle, S. T. B. Goennenwein, C. Felser
Invited talks
2022
H. Reichlova
Spontaneous Hall effect in an uncoventional antiferromagent with vanishing magnetization
Trends in Magnetism 2022 conference, Venice, Italy
H. Reichlova
Spontaneous anomalous Hall response and altermagnetism explored in MnTe and Mn5Si3
On-line SPICE-SPIN+X Seminar
H. Reichlova
Anomalous Nernst effect in Antiferromagnetic Thin Films
Board meeting Czech Physical Society, Praha, Czechia
H. Reichlova
Anomalous Nernst effect in Antiferromagnetic Thin Films
Spin Caloritronics XI, Chicago, USA
D. Kriegner
Spontaneous anomalous Hall effect arising from antiparallel magnetic order in a semiconductor
Young Research Leaders Group Workshop: Spins, Orbits, Charges, and Heat in Magnets, Ingelheim, Germany
2021
H. Reichlova
Spontaneous Hall and Nernst effects in antiferromagnet
American Physical Society March Meeting Virtual
H. Reichlova
Magneto-thermal transport in Mn-based complex magnetic materials
CzechNanoLab User Meeting
A. Thomas
Transport in Quantum Devices
Colloquium Felix-Bloch-Insitute for solid state physics, U Leipzig
2020
H. Reichlova
Magneto-Thermal Transport in Weyl Semimetal Co2MnGa Thin Films
Magnetism and Magnetic Materials conference Virtual
A. Thomas
Transport in Quantum Devices
Physics Colloquium U Bielefeld
D. Kriegner
Anomalous Hall effect and spin orbit torques in tetragonal ferrimagnetic Mn3−xPtxGa thin films
Young Research Leaders Group Workshop: Spin, Charge, and Heat Transport: From Symmetries to Emergent Functionalities, virtual
2019
H. Reichlova
Reading and writing of magnetic structure in antiferromagnets by scanning thermal gradient microscopy
SPICE workshop - Antiferromagnetic Spintronics, Mainz, Germany
A. Thomas
Memristive Tunnel Junctions
Physics Colloquium U Greifswald
A. Thomas
Atomic layer deposited electronic devices
Physics Colloquium U Oldenburg
A. Thomas
Memristor based neural networks
DPG spring meeting Regensburg
A. Thomas
Memristive Tunnel Junctions
Physics Colloquium U Chemnitz
A. Thomas
Atomic layer deposition for spintronic devices
Spincaloritronics X, Groningen, Netherlands
A. Thomas
Atomic layer deposition for spintronic devices
Spincaloritronics X, Groningen, Netherlands