Spin flop and crystalline anisotropic magnetoresistance in CuMnAs

0535300 - FZÚ 2021 RIV US eng J - 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. - Makarovský, O. - Gas, K. - Sawicki, M. - Kriegner, Dominik - Zubáč, Jan - Olejník, Kamil - Novák, Vít - Jungwirth, Tomáš - Shahrokhvand, M. - Zeitler, U. - Dhesi, S.S. - Maccherozzi, F.
Spin flop and crystalline anisotropic magnetoresistance in CuMnAs.
Physical Review B. Roč. 101, č. 9 (2020), s. 1-6, č. článku 094429. ISSN 2469-9950. E-ISSN 2469-9969
R&D Projects: GA MŠMT LM2015087; GA MŠMT EF16_013/0001405; GA ČR(CZ) GX19-28375X
EU Projects: European Commission(XE) 766566 - ASPIN
Grant - others:OP VVV - LNSM(XE) CZ.02.1.01/0.0/0.0/16_013/0001405
Institutional support: RVO:68378271
Keywords : antiferromagnets * spintronics
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 4.036, year: 2020
Method of publishing: Limited access
https://doi.org/10.1103/PhysRevB.101.094429

We report magnetic-field-induced rotation of the antiferromagnetic Neel 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 spin reorientation in films with uniaxial and biaxial magnetic anisotropies, respectively, for applied magnetic fields of the order of 2 T. The remnant antiferromagnetic domain configurations are determined using x-ray photoemission electron microscopy. Next, we show that the Neel vector reorientations are manifested in the longitudinal and transverse anisotropic magnetoresistance. Dependencies of the electrical resistance on the orientation of the Neel vector with respect to both the electrical current direction and the crystal symmetry are identified, including a weak fourth-order term evident at high magnetic fields.
Permanent Link: http://hdl.handle.net/11104/0313367