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Professor TOMAS JUNGWIRTH's Outputs (58)

Unidirectional magnetoresistance and spin-orbit torque in NiMnSb (2021)
Journal Article
Železný, J., Fang, Z., Olejník, K., Patchett, J., Gerhard, F., Gould, C., Molenkamp, L. W., Gomez-Olivella, C., Zemen, J., Tichý, T., Jungwirth, T., & Ciccarelli, C. (2021). Unidirectional magnetoresistance and spin-orbit torque in NiMnSb. Physical Review B, 104(5), 1-13. https://doi.org/10.1103/PhysRevB.104.054429

Spin-dependent transport phenomena due to relativistic spin-orbit coupling and broken space-inversion symmetry are often difficult to interpret microscopically, in particular when occurring at surfaces or interfaces. Here we present a theoretical and... Read More about Unidirectional magnetoresistance and spin-orbit torque in NiMnSb.

Frequency‐Independent Terahertz Anomalous Hall Effect in DyCo 5, Co 32Fe68, and Gd 27Fe73 Thin Films from DC to 40 THz (2021)
Journal Article
Seifert, T. S., Martens, U., Radu, F., Ribow, M., Berritta, M., Nádvorník, L., Starke, R., Jungwirth, T., Wolf, M., Radu, I., Münzenberg, M., Oppeneer, P. M., Woltersdorf, G., & Kampfrath, T. (2021). Frequency‐Independent Terahertz Anomalous Hall Effect in DyCo 5, Co 32Fe68, and Gd 27Fe73 Thin Films from DC to 40 THz. Advanced Materials, 33(14), Article 2007398. https://doi.org/10.1002/adma.202007398

The anomalous Hall effect (AHE) is a fundamental spintronic charge-to-charge-current conversion phenomenon and closely related to spin-to-charge-current conversion by the spin Hall effect. Future high-speed spintronic devices will crucially rely on s... Read More about Frequency‐Independent Terahertz Anomalous Hall Effect in DyCo 5, Co 32Fe68, and Gd 27Fe73 Thin Films from DC to 40 THz.

Quenching of an antiferromagnet into high resistivity states using electrical or ultrashort optical pulses (2020)
Journal Article
Kašpar, Z., Surýnek, M., Zubáč, J., Krizek, F., Novák, V., Campion, R. P., Wörnle, M. S., Gambardella, P., Marti, X., Němec, P., Edmonds, K. W., Reimers, S., Amin, O. J., Maccherozzi, F., Dhesi, S. S., Wadley, P., Wunderlich, J., Olejník, K., & Jungwirth, T. (2021). Quenching of an antiferromagnet into high resistivity states using electrical or ultrashort optical pulses. Nature Electronics, 4(1), 30-37. https://doi.org/10.1038/s41928-020-00506-4

Antiferromagnets are of potential use in the development of spintronic devices due to their ultrafast dynamics, insensitivity to external magnetic fields and absence of magnetic stray fields. Similar to their ferromagnetic counterparts, antiferromagn... Read More about Quenching of an antiferromagnet into high resistivity states using electrical or ultrashort optical pulses.

Magneto-Seebeck microscopy of domain switching in collinear antiferromagnet CuMnAs (2020)
Journal Article
Janda, T., Godinho, J., Ostatnicky, T., Pfitzner, E., Ulrich, G., Hoehl, A., Reimers, S., Šobáň, Z., Metzger, T., Reichlová, H., Novák, V., Campion, R. P., Heberle, J., Wadley, P., Edmonds, K. W., Amin, O. J., Chauhan, J. S., Dhesi, S. S., Maccherozzi, F., Otxoa, R. M., …Wunderlich, J. (2020). Magneto-Seebeck microscopy of domain switching in collinear antiferromagnet CuMnAs. Physical Review Materials, 4(9), Article 094413. https://doi.org/10.1103/physrevmaterials.4.094413

Antiferromagnets offer spintronic device characteristics unparalleled in ferromagnets owing to their lack of stray fields, THz spin dynamics, and rich materials landscape. Microscopic imaging of antiferromagnetic domains is one of the key prerequisit... Read More about Magneto-Seebeck microscopy of domain switching in collinear antiferromagnet CuMnAs.

Crystal time-reversal symmetry breaking and spontaneous Hall effect in collinear antiferromagnets (2020)
Journal Article
Šmejkal, L., González-Hernández, R., Jungwirth, T., & Sinova, J. (2020). Crystal time-reversal symmetry breaking and spontaneous Hall effect in collinear antiferromagnets. Science Advances, 6(23), Article eaaz8809. https://doi.org/10.1126/sciadv.aaz8809

Electrons, commonly moving along the applied electric field, acquire in certain magnets a dissipationless transverse velocity. This spontaneous Hall effect, found more than a century ago, has been understood in terms of the time-reversal symmetry bre... Read More about Crystal time-reversal symmetry breaking and spontaneous Hall effect in collinear antiferromagnets.

Spin flop and crystalline anisotropic magnetoresistance in CuMnAs (2020)
Journal Article
Wang, M., Andrews, C., Reimers, S., Amin, O. J., Wadley, P., Campion, R. P., Poole, S. F., Felton, J., Edmonds, K. W., Gallagher, B. L., Rushforth, A. W., Makarovsky, O., Gas, K., Sawicki, M., Kriegner, D., Zubáč, J., Olejník, K., Novák, V., Jungwirth, T., Shahrokhvand, M., …Maccherozzi, F. (2020). Spin flop and crystalline anisotropic magnetoresistance in CuMnAs. Physical Review B, 101(9), Article 094429. https://doi.org/10.1103/PhysRevB.101.094429

We report magnetic-field-induced rotation of the antiferromagnetic Néel vector in epitaxial CuMnAs thin films. First, using soft x-ray magnetic linear dichroism spectroscopy as well as magnetometry, we demonstrate spin-flop switching and continuous s... Read More about Spin flop and crystalline anisotropic magnetoresistance in CuMnAs.

Temperature-dependent resistivity and anomalous Hall effect in NiMnSb from first principles (2019)
Journal Article
Wagenknecht, D., Šmejkal, L., Kašpar, Z., Sinova, J., Jungwirth, T., Kudrnovský, J., Carva, K., & Turek, I. (2019). Temperature-dependent resistivity and anomalous Hall effect in NiMnSb from first principles. Physical Review B, 99(17), Article 174433. https://doi.org/10.1103/physrevb.99.174433

© 2019 American Physical Society. We present implementation of the alloy analogy model within fully relativistic density-functional theory with the coherent potential approximation for a treatment of nonzero temperatures. We calculate contributions o... Read More about Temperature-dependent resistivity and anomalous Hall effect in NiMnSb from first principles.

Electrically induced and detected Néel vector reversal in a collinear antiferromagnet (2018)
Journal Article
Godinho, J., Reichlová, H., Kriegner, D., Novák, V., Olejník, K., Kašpar, Z., Šobáň, Z., Wadley, P., Campion, R. P., Otxoa, R. M., Roy, P. E., Železný, J., Jungwirth, T., & Wunderlich, J. (2018). Electrically induced and detected Néel vector reversal in a collinear antiferromagnet. Nature Communications, 9(1), Article 4686. https://doi.org/10.1038/s41467-018-07092-2

© 2018, The Author(s). Antiferromagnets are enriching spintronics research by many favorable properties that include insensitivity to magnetic fields, neuromorphic memory characteristics, and ultra-fast spin dynamics. Designing memory devices with el... Read More about Electrically induced and detected Néel vector reversal in a collinear antiferromagnet.

Current polarity-dependent manipulation of antiferromagnetic domains (2018)
Journal Article
Wadley, P., Reimers, S., Grzybowski, M. J., Andrews, C., Wang, M., Chauhan, J., Gallagher, B. L., Campion, R. P., Edmonds, K. W., Dhesi, S. S., Maccherozzi, F., Novák, V., Wunderlich, J., & Jungwirth, T. (2018). Current polarity-dependent manipulation of antiferromagnetic domains. Nature Nanotechnology, 13(5), 362-365. https://doi.org/10.1038/s41565-018-0079-1

Antiferromagnets have several favourable properties as active elements in spintronic devices, including ultra-fast dynamics, zero stray fields and insensitivity to external magnetic fields. Tetragonal CuMnAs is a testbed system in which the antiferro... Read More about Current polarity-dependent manipulation of antiferromagnetic domains.

Terahertz electrical writing speed in an antiferromagnetic memory (2018)
Journal Article
Olejník, K., Seifert, T., Kašpar, Z., Novák, V., Wadley, P., Campion, R. P., Baumgartner, M., Gambardella, P., Němec, P., Wunderlich, J., Sinova, J., Kužel, P., Müller, M., Kampfrath, T., & Jungwirth, T. (2018). Terahertz electrical writing speed in an antiferromagnetic memory. Science Advances, 4(3), Article eaar3566. https://doi.org/10.1126/sciadv.aar3566

© 2018 American Association for the Advancement of Science. All rights reserved. The speed of writing of state-of-the-art ferromagnetic memories is physically limited by an intrinsic gigahertz threshold. Recently, realization of memory devices based... Read More about Terahertz electrical writing speed in an antiferromagnetic memory.

Writing and reading antiferromagnetic Mn2Au by Néel spin-orbit torques and large anisotropic magnetoresistance (2018)
Journal Article
Bodnar, S. Y., Šmejkal, L., Turek, I., Jungwirth, T., Gomonay, O., Sinova, J., Sapozhnik, A. A., Elmers, H.-J., Kläui, M., & Jourdan, M. (2018). Writing and reading antiferromagnetic Mn2Au by Néel spin-orbit torques and large anisotropic magnetoresistance. Nature Communications, 9(1), Article 348. https://doi.org/10.1038/s41467-017-02780-x

Using antiferromagnets as active elements in spintronics requires the ability to manipulate and read-out the Néel vector orientation. Here we demonstrate for Mn2Au, a good conductor with a high ordering temperature suitable for applications, reproduc... Read More about Writing and reading antiferromagnetic Mn2Au by Néel spin-orbit torques and large anisotropic magnetoresistance.

Magnetic anisotropy in antiferromagnetic hexagonal MnTe (2017)
Journal Article
Kriegner, D., Reichlova, H., Grenzer, J., Schmidt, W., Ressouche, E., Godinho, J., Wagner, T., Martin, S., Shick, A., Volobuev, V., Springholz, G., Holý, V., Wunderlich, J., Jungwirth, T., & Výborný, K. (2017). Magnetic anisotropy in antiferromagnetic hexagonal MnTe. Physical Review B, 96(21), https://doi.org/10.1103/PhysRevB.96.214418

Antiferromagnetic hexagonal MnTe is a promising material for spintronic devices relying on the control of antiferromagnetic domain orientations. Here we report on neutron diffraction, magnetotransport, and magnetometry experiments on semiconducting e... Read More about Magnetic anisotropy in antiferromagnetic hexagonal MnTe.

Control of antiferromagnetic spin axis orientation in bilayer Fe/CuMnAs films (2017)
Journal Article
Wadley, P., Edmonds, K., Shahedkhah, M., Campion, R., Gallagher, B., Železný, J., Kunes, J., Novák, V., Jungwirth, T., Saidl, V., Němec, P., Maccherozzi, F., & Dhesi, S. (in press). Control of antiferromagnetic spin axis orientation in bilayer Fe/CuMnAs films. Scientific Reports, 7, Article 11147. https://doi.org/10.1038/s41598-017-11653-8

Using x-ray magnetic circular and linear dichroism techniques, we demonstrate a collinear exchange coupling between an epitaxial antiferromagnet, tetragonal CuMnAs, and an Fe surface layer. A small uncompensated Mn magnetic moment is observed which i... Read More about Control of antiferromagnetic spin axis orientation in bilayer Fe/CuMnAs films.

The 2017 Magnetism Roadmap (2017)
Journal Article
Sander, D., Valenzuela, S. O., Makarov, D., Marrows, C. H., Fullerton, E. E., Fischer, P., McCord, J., Vavassori, P., Mangin, S., Pirro, P., Hillebrands, B., Kent, A. D., Jungwirth, T., Gutfleisch, O., Kim, C. G., & Berger, A. (2017). The 2017 Magnetism Roadmap. Journal of Physics D: Applied Physics, 50(36), Article 363001. https://doi.org/10.1088/1361-6463/aa81a1

Building upon the success and relevance of the 2014 Magnetism Roadmap, this 2017 Magnetism Roadmap edition follows a similar general layout, even if its focus is naturally shifted, and a different group of experts and, thus, viewpoints are being coll... Read More about The 2017 Magnetism Roadmap.

Antiferromagnetic CuMnAs multi-level memory cell with microelectronic compatibility (2017)
Journal Article
Olejnik, K., Schuler, V., Marti, X., Novák, V., Kaspar, Z., Wadley, P., Campion, R. P., Edmonds, K. W., Gallagher, B. L., Garces, J., Baumgartner, M., Gambardella, P., & Jungwirth, T. (2017). Antiferromagnetic CuMnAs multi-level memory cell with microelectronic compatibility. Nature Communications, 8, Article 15434. https://doi.org/10.1038/ncomms15434

Antiferromagnets offer a unique combination of properties including the radiation and magnetic field hardness, the absence of stray magnetic fields, and the spin-dynamics frequency scale in terahertz. Recent experiments have demonstrated that relativ... Read More about Antiferromagnetic CuMnAs multi-level memory cell with microelectronic compatibility.

Inertial displacement of a domain wall excited byultra-short circularly polarized laser pulses (2017)
Journal Article
Janda, T., Roy, P., Otxoa, R., Soban, Z., Ramsay, A., Irvine, A., Trojanek, F., Surynek, M., Campion, R., Gallagher, B., Nemec, P., Jungwith, T., & Wunderlich, J. (2017). Inertial displacement of a domain wall excited byultra-short circularly polarized laser pulses. Nature Communications, 8, Article 15226. https://doi.org/10.1038/ncomms15226

Domain wall motion driven by ultra-short laser pulses is a prerequisite for envisaged low-power spintronics combining storage of information in magnetoelectronic devices with high speed and long distance transmission of information encoded in circula... Read More about Inertial displacement of a domain wall excited byultra-short circularly polarized laser pulses.

Electric control of Dirac quasiparticles by spin-orbit torque in an antiferromagnet (2017)
Journal Article
Šmejkal, L., Železný, J., Sinova, J., & Jungwirth, T. (2017). Electric control of Dirac quasiparticles by spin-orbit torque in an antiferromagnet. Physical Review Letters, 118(10), https://doi.org/10.1103/PhysRevLett.118.106402

Spin orbitronics and Dirac quasiparticles are two fields of condensed matter physics initiated independently about a decade ago. Here we predict that Dirac quasiparticles can be controlled by the spin-orbit torque reorientation of the Néel vector in... Read More about Electric control of Dirac quasiparticles by spin-orbit torque in an antiferromagnet.

Concepts of antiferromagnetic spintronics (2017)
Journal Article
Gomonay, O., Jungwirth, T., & Sinova, J. (in press). Concepts of antiferromagnetic spintronics. physica status solidi (RRL) - Rapid Research Letters, 11(4), Article 1700022. https://doi.org/10.1002/pssr.201700022

Antiferromagnetic spintronics is an emerging research field whose focus is on the electrical, optical or other means of control of the antiferromagnetic order parameter and its utility in information technology devices. An example of recently discove... Read More about Concepts of antiferromagnetic spintronics.

Imaging current-induced switching of antiferromagnetic domains in CuMnAs (2017)
Journal Article
Grzybowski, M., Wadley, P., Edmonds, K., Beardsley, R., Hills, V. A., Campion, R., Gallagher, B., Chauhan, J. S., Novák, V., Jungwirth, T., Maccherozzi, F., & Dhesi, S. (2017). Imaging current-induced switching of antiferromagnetic domains in CuMnAs. Physical Review Letters, 118(5), Article 057701. https://doi.org/10.1103/PhysRevLett.118.057701

The magnetic order in antiferromagnetic materials is hard to control with external magnetic fields. Using X-ray Magnetic Linear Dichroism microscopy, we show that staggered effective fields generated by electrical current can induce modification of t... Read More about Imaging current-induced switching of antiferromagnetic domains in CuMnAs.