All Outputs (48)

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., …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.

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., …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.

Current polarity-dependent manipulation of antiferromagnetic domains (2018)
Journal Article
Wadley, P., Reimers, S., Grzybowski, M. J., Andrews, C., Wang, M., Chauhan, 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.

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., …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., …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., …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.

Antiferromagnetic CuMnAs multi-level memory cell with microelectronic compatibility (2017)
Journal Article
Olejnik, K., Schuler, V., Marti, X., Novák, V., Kaspar, Z., Wadley, 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., …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., …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.

Optical determination of the Néel vector in a CuMnAs thin-film antiferromagnet (2017)
Journal Article
Saidl, V., Němec, P., Wadley, P., Hills, V., Campion, R. P., Novák, V., …Jungwirth, T. (2017). Optical determination of the Néel vector in a CuMnAs thin-film antiferromagnet. Nature Photonics, 11(2), 91-96. https://doi.org/10.1038/nphoton.2016.255

Recent breakthroughs in electrical detection and manipulation of antiferromagnets have opened a new avenue in the research of non-volatile spintronic devices.1-10 Antiparallel spin sublattices in antiferromagnets, producing zero dipolar fields, lead... Read More about Optical determination of the Néel vector in a CuMnAs thin-film antiferromagnet.

Spin-orbit torques in locally and globally non-centrosymmetric crystals: antiferromagnets and ferromagnets (2017)
Journal Article
Železný, J., Gao, H., Manchon, A., Freimuth, F., Mokrousov, Y., Zemen, J., …Jungwirth, T. (2017). Spin-orbit torques in locally and globally non-centrosymmetric crystals: antiferromagnets and ferromagnets. Physical Review B, 95(1), Article 014403. https://doi.org/10.1103/PhysRevB.95.014403

One of the main obstacles that prevents practical applications of antiferromagnets is the dfficulty of manipulating the magnetic order parameter. Recently, following the theoretical prediction [J. Železný et al., PRL 113, 157201 (2014)], the electric... Read More about Spin-orbit torques in locally and globally non-centrosymmetric crystals: antiferromagnets and ferromagnets.

Isothermal anisotropic magnetoresistance in antiferromagnetic metallic IrMn (2016)
Journal Article
Galceran, R., Fina, I., Cisneros-Fernandez, J., Bozzo, B., Frontera, C., Lopez-Mir, L., …Martinez, B. (2016). Isothermal anisotropic magnetoresistance in antiferromagnetic metallic IrMn. Scientific Reports, 6, Article 35471. https://doi.org/10.1038/srep35471

Antiferromagnetic spintronics is an emerging field; antiferromagnets can improve the functionalities of ferromagnets with higher response times, and having the information shielded against external magnetic field. Moreover, a large list of aniferroma... Read More about Isothermal anisotropic magnetoresistance in antiferromagnetic metallic IrMn.

Enhancement of the spin Hall voltage in a reverse-biased planar p-n junction (2016)
Journal Article
Nádvornik, L., Olejnik, K., Němec, P., Novák, V., Janda, T., Wunderlich, J., …Jungwirth, T. (2016). Enhancement of the spin Hall voltage in a reverse-biased planar p-n junction. Physical Review B, 94(7), Article 075306. https://doi.org/10.1103/PhysRevB.94.075306

We report an experimental demonstration of a local amplification of the spin Hall voltage using an expanding depletion zone at a p-n junction in GaAs/AlGaAs Hall-bar microdevices. It is demonstrated that the depletion zone can be spatially expanded b... Read More about Enhancement of the spin Hall voltage in a reverse-biased planar p-n junction.

Investigation of magneto-structural phase transition in FeRh by reflectivity and transmittance measurements in visible and near-infrared spectral region (2016)
Journal Article
Saidl, V., Brajer, M., Horák, L., Reichlová, H., Výborný, K., Veis, M., …Němec, P. (2016). Investigation of magneto-structural phase transition in FeRh by reflectivity and transmittance measurements in visible and near-infrared spectral region. New Journal of Physics, 18(83017), 1-11. https://doi.org/10.1088/1367-2630/18/8/083017

Magneto-structural phase transition in FeRh epitaxial layers was studied optically. It is shown that the transition between the low-temperature antiferromagnetic phase and the high-temperature ferromagnetic phase is accompanied by a rather large chan... Read More about Investigation of magneto-structural phase transition in FeRh by reflectivity and transmittance measurements in visible and near-infrared spectral region.

Temperature and thickness dependence of tunneling anisotropic magnetoresistance in exchange-biased Py/IrMn/MgO/Ta stacks (2016)
Journal Article
Reichlová, H., Novák, V., Kurosaki, Y., Yamada, M., Yamamoto, H., Nishide, A., …Jungwirth, T. (2016). Temperature and thickness dependence of tunneling anisotropic magnetoresistance in exchange-biased Py/IrMn/MgO/Ta stacks. Materials Research Express, 3, Article 076406. https://doi.org/10.1088/2053-1591/3/7/076406

Weinvestigate the thickness and temperature dependence of a series of Ni0.8Fe0.2/Ir0.2Mn0.8 bilayer samples with varying thickness ratio of the ferromagnet/antiferromagnet (tFM tAFM) in order to explore the exchange coupling strengths in tunneling an... Read More about Temperature and thickness dependence of tunneling anisotropic magnetoresistance in exchange-biased Py/IrMn/MgO/Ta stacks.

High Antiferromagnetic Domain Wall Velocity Induced by Néel Spin-Orbit Torques (2016)
Journal Article
Gomonay, O., Jungwirth, T., & Sinova, J. (2016). High Antiferromagnetic Domain Wall Velocity Induced by Néel Spin-Orbit Torques. Physical Review Letters, 117(1), Article 017202. https://doi.org/10.1103/PhysRevLett.117.017202

We demonstrate the possibility to drive an antiferromagnetic domain wall at high velocities by fieldlike Néel spin-orbit torques. Such torques arise from current-induced local fields that alternate their orientation on each sublattice of the antiferr... Read More about High Antiferromagnetic Domain Wall Velocity Induced by Néel Spin-Orbit Torques.

Multiple-stable anisotropic magnetoresistance memory in antiferromagnetic MnTe (2016)
Journal Article
Kriegner, D., Výborný, K., Olejnik, K., Reichlová, H., Novák, V., Marti, X., …Jungwirth, T. (in press). Multiple-stable anisotropic magnetoresistance memory in antiferromagnetic MnTe. Nature Communications, 7(11623), https://doi.org/10.1038/ncomms11623

Commercial magnetic memories rely on the bistability of ordered spins in ferromagnetic materials. Recently, experimental bistable memories have been realized using fully compensated antiferromagnetic metals. Here we demonstrate a multiple-stable memo... Read More about Multiple-stable anisotropic magnetoresistance memory in antiferromagnetic MnTe.

Room-temperature spin-orbit torque in NiMnSb (2016)
Journal Article
Ciccarelli, C., Anderson, L., Tshitoyan, V., Ferguson, A., Gerhard, F., Gould, C., …Jungwirth, T. (in press). Room-temperature spin-orbit torque in NiMnSb. Nature Physics, 12, https://doi.org/10.1038/nphys3772

Materials that crystalize in diamond-related lattices, with Si and GaAs as their prime examples, are at the foundation of modern electronics. Simultaneously, the two atomic sites in the unit cell of these crystals form inversion partners which gives... Read More about Room-temperature spin-orbit torque in NiMnSb.