Outputs (48)

A high electron mobility phonotransistor (2018)
Journal Article
Poyser, C. L., Li, L. H., Campion, R. P., Akimov, A. V., Linfield, E. H., Davies, A. G., Cunningham, J. E., & Kent, A. J. (2018). A high electron mobility phonotransistor. Communications Physics, 1, 1-7. https://doi.org/10.1038/s42005-018-0059-7

Acoustoelectric devices convert acoustic energy to electrical energy and vice versa. Devices working at much higher acoustic frequencies than those currently available have potential scientific and technological applications, e.g.: as detectors in ph... Read More about A high electron mobility phonotransistor.

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.

Switching the uniaxial magnetic anisotropy by ion irradiation induced compensation (2018)
Journal Article
Yuan, Y., Amarouche, T., Xu, C., Rushforth, A., Böttger, R., Edmonds, K., Campion, R., Gallagher, B., Helm, M., Von Bardeleben, H. J., & Zhou, S. (2018). Switching the uniaxial magnetic anisotropy by ion irradiation induced compensation. Journal of Physics D: Applied Physics, 51(14), https://doi.org/10.1088/1361-6463/aab1db

© 2018 IOP Publishing Ltd. In the present work, the uniaxial magnetic anisotropy of GaMnAsP is modified by helium ion irradiation. According to the micro-magnetic parameters, e.g. resonance fields and anisotropy constants deduced from ferromagnetic r... Read More about Switching the uniaxial magnetic anisotropy by ion irradiation induced compensation.

Phonon spectroscopy with chirped shear and compressive acoustic pulses (2017)
Journal Article
Poyser, C. L., York, W., Srikanthreddy, D., Glavin, B., Linnik, T., Campion, R., Akimov, A., & Kent, A. (in press). Phonon spectroscopy with chirped shear and compressive acoustic pulses. Physical Review Letters, 119, Article 255502. https://doi.org/10.1103/PhysRevLett.119.255502

Picosecond duration compressive and shear phonon wave packets injected into (311) GaAs slabs transform after propagation through ∼1  mm into chirped acoustic pulses with a frequency increasing in time due to phonon dispersion. By probing the temporal... Read More about Phonon spectroscopy with chirped shear and compressive acoustic pulses.

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.

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.

Investigation of exchange coupled bilayer Fe/CuMnAs by pump-probe experiment (2017)
Journal Article
Saidl, V., Němec, P., Wadley, P., Edmonds, K., Campion, R., Novák, V., Gallagher, B., & Trojánek, F. (in press). Investigation of exchange coupled bilayer Fe/CuMnAs by pump-probe experiment. physica status solidi (RRL) - Rapid Research Letters, 11(4), https://doi.org/10.1002/pssr.201600441

Time-resolved pump-probe magneto-optical method was used to study Fe/CuMnAs bilayer. The probe polarization dependence was used to identify and separate parts of detected signals due to Faraday and Voigt magneto-optical effects that provide informati... Read More about Investigation of exchange coupled bilayer Fe/CuMnAs by pump-probe experiment.

Effect of lithographically-induced strain relaxation on the magnetic domain configuration in microfabricated epitaxially grown Fe81Ga19 (2017)
Journal Article
Beardsley, R. P., Parkes, D. E., Zemen, J., Bowe, S., Edmonds, K. W., Reardon, C., Maccherozzi, F., Isakov, I., Warburton, P. A., Campion, R. P., Gallagher, B. L., Cavill, S. A., & Rushforth, A. W. (2017). Effect of lithographically-induced strain relaxation on the magnetic domain configuration in microfabricated epitaxially grown Fe81Ga19. Scientific Reports, 7(1), Article 42107. https://doi.org/10.1038/srep42107

We investigate the role of lithographically-induced strain relaxation in a micron-scaled device fabricated from epitaxial thin films of the magnetostrictive alloy Fe81Ga19. The strain relaxation due to lithographic patterning induces a magnetic aniso... Read More about Effect of lithographically-induced strain relaxation on the magnetic domain configuration in microfabricated epitaxially grown Fe81Ga19.

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.