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Effect of magnetic anisotropy relaxation on laser-induced magnetization precession in thin galfenol films (2021)
Journal Article
Gerevenkov, P. I., Kuntu, D. V., Filatov, I. A., Shelukhin, L. A., Wang, M., Pattnaik, D. P., …Khokhlov, N. E. (2021). Effect of magnetic anisotropy relaxation on laser-induced magnetization precession in thin galfenol films. Physical Review Materials, 5(9), Article 094407. https://doi.org/10.1103/PhysRevMaterials.5.094407

The rate and pathways of relaxation of a magnetic medium to its equilibrium following excitation with intense and short laser pulses are the key ingredients of ultrafast optical control of spins. Here we study experimentally the evolution of the magn... Read More about Effect of magnetic anisotropy relaxation on laser-induced magnetization precession in thin galfenol films.

Protected Long-Distance Guiding of Hypersound Underneath a Nanocorrugated Surface (2021)
Journal Article
Yaremkevich, D. D., Scherbakov, A. V., Kukhtaruk, S. M., Linnik, T. L., Khokhlov, N. E., Godejohann, F., …Bayer, M. (2021). Protected Long-Distance Guiding of Hypersound Underneath a Nanocorrugated Surface. ACS Nano, 15(3), 4802–4810. https://doi.org/10.1021/acsnano.0c09475

In nanoscale communications, high-frequency surface acoustic waves are becoming effective data carriers and encoders. On-chip communications require acoustic wave propagation along nanocorrugated surfaces which strongly scatter traditional Rayleigh w... Read More about Protected Long-Distance Guiding of Hypersound Underneath a Nanocorrugated Surface.

Magnetism and magnetoresistance in the critical region of a dilute ferromagnet (2021)
Journal Article
Wang, M., Howells, B., Marshall, R. A., Taylor, J. M., Edmonds, K. W., Rushforth, A. W., …Gallagher, B. L. (2021). Magnetism and magnetoresistance in the critical region of a dilute ferromagnet. Scientific Reports, 11, Article 2300. https://doi.org/10.1038/s41598-021-81893-2

We present detailed experimental measurements and simulations of the field-dependent magnetization and magnetoresistance in the vicinity of the Curie temperature in the highly disordered dilute ferromagnetic semiconductor (Ga,Mn)As. The observed depe... Read More about Magnetism and magnetoresistance in the critical region of a dilute ferromagnet.

Magnon polaron formed by selectively coupled coherent magnon and phonon modes of a surface patterned ferromagnet (2020)
Journal Article
Godejohann, F., Scherbakov, A., Kukhtaruk, S., Poddubny, A., Yaremkevich, D., Wang, M., …Bayer, M. (2020). Magnon polaron formed by selectively coupled coherent magnon and phonon modes of a surface patterned ferromagnet. Physical Review B, 102(14), Article 144438. https://doi.org/10.1103/PhysRevB.102.144438

Strong coupling between two quanta of different excitations leads to the formation of a hybridized state which paves a way for exploiting new degrees of freedom to control phenomena with high efficiency and precision. A magnon polaron is the hybridiz... Read More about Magnon polaron formed by selectively coupled coherent magnon and phonon modes of a surface patterned ferromagnet.

Optical Excitation of Propagating Magnetostatic Waves in an Epitaxial Galfenol Film by Ultrafast Magnetic Anisotropy Change (2019)
Journal Article
Khokhlov, N. E., Gerevenkov, P. I., Shelukhin, L. A., Azovtsev, A. V., Pertsev, N. A., Wang, M., …Kalashnikova, A. M. (2019). Optical Excitation of Propagating Magnetostatic Waves in an Epitaxial Galfenol Film by Ultrafast Magnetic Anisotropy Change. Physical Review Applied, 12(4), Article 044044. https://doi.org/10.1103/PhysRevApplied.12.044044

© 2019 American Physical Society. Using a time-resolved optically pumped scanning-optical-microscopy technique, we demonstrate the laser-driven excitation and propagation of spin waves in a 20-nm film of a ferromagnetic metallic alloy Galfenol epitax... Read More about Optical Excitation of Propagating Magnetostatic Waves in an Epitaxial Galfenol Film by Ultrafast Magnetic Anisotropy Change.

Optical excitation of single- and multi-mode magnetization precession in Fe-Ga nanolayers (2019)
Journal Article
Scherbakov, A., Danilov, A., Godejohann, F., Linnik, T., Glavin, B., Shelukhin, L. A., …Bayer, M. (2019). Optical excitation of single- and multi-mode magnetization precession in Fe-Ga nanolayers. Physical Review Applied, 11(3), Article 031003. https://doi.org/10.1103/PhysRevApplied.11.031003

We demonstrate a variety of precessional responses of the magnetization to ultrafast optical excitation in nanolayers of Galfenol (Fe,Ga), which is a ferromagnetic material with large saturation magnetization and enhanced magnetostriction. The partic... Read More about Optical excitation of single- and multi-mode magnetization precession in Fe-Ga nanolayers.

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.

Contributions from coherent and incoherent lattice excitations to ultrafast optical control of magnetic anisotropy of metallic films (2016)
Journal Article
Kats, V. N., Linnik, T. L., Salasyuk, A. S., Rushforth, A. W., Wang, M., Wadley, P., …Scherbakov, A. V. (2016). Contributions from coherent and incoherent lattice excitations to ultrafast optical control of magnetic anisotropy of metallic films. Proceedings of SPIE, 9835(98351Q), https://doi.org/10.1117/12.2238020

Spin-lattice coupling is one of the most prominent interactions mediating response of spin ensemble to ultrafast optical excitation. Here we exploit optically generated coherent and incoherent phonons to drive coherent spin dynamics, i.e. precession,... Read More about Contributions from coherent and incoherent lattice excitations to ultrafast optical control of magnetic anisotropy of metallic films.

Three-dimensional Heisenberg critical behavior in the highly disordered dilute ferromagnetic semiconductor (Ga,Mn)As (2016)
Journal Article
Wang, M., Marshall, R. A., Edmonds, K. W., Rushforth, A., Campion, R., & Gallagher, B. (2016). Three-dimensional Heisenberg critical behavior in the highly disordered dilute ferromagnetic semiconductor (Ga,Mn)As. Physical Review B, 93(18), Article 184417. https://doi.org/10.1103/PhysRevB.93.184417

We present detailed studies of critical behavior in the strongly site-disordered dilute ferromagnetic semiconductor (Ga,Mn)As. (Ga,Mn)As has a low saturation magnetization and relatively strong magnetocrystalline anisotropy. This combination of prop... Read More about Three-dimensional Heisenberg critical behavior in the highly disordered dilute ferromagnetic semiconductor (Ga,Mn)As.

Interfacial contribution to thickness dependent in-plane anisotropic magnetoresistance (2015)
Journal Article
Tokaç, M., Wang, M., Jaiswal, S., Rushforth, A. W., Gallagher, B. L., Atkinson, D., & Hindmarch, A. T. (2015). Interfacial contribution to thickness dependent in-plane anisotropic magnetoresistance. AIP Advances, 5(12), 127108. https://doi.org/10.1063/1.4937556

We have studied in-plane anisotropic magnetoresistance (AMR) in cobalt films with overlayers having designed electrically interface transparency. With an electrically opaque cobalt/overlayer interface, the AMR ratio is shown to vary in inverse propor... Read More about Interfacial contribution to thickness dependent in-plane anisotropic magnetoresistance.

Magnetic coupling in ferromagnetic semiconductor (Ga,Mn)As/(Al,Ga,Mn)As bilayers (2015)
Journal Article
Wang, M., Wadley, P., Campion, R. P., Rushforth, A. W., Edmonds, K. W., Gallagher, B. L., …Langridge, S. (2015). Magnetic coupling in ferromagnetic semiconductor (Ga,Mn)As/(Al,Ga,Mn)As bilayers. Journal of Applied Physics, 118(5), Article 053913. https://doi.org/10.1063/1.4928206

We report on a study of ferromagnetic semiconductor (Ga,Mn)As/(Al,Ga,Mn)As bilayers using magnetometry and polarized neutron reflectivity (PNR). From depth-resolved characterization of the magnetic structure obtained by PNR, we concluded that the (Ga... Read More about Magnetic coupling in ferromagnetic semiconductor (Ga,Mn)As/(Al,Ga,Mn)As bilayers.