Effective easy-axis anisotropy of the two-sublattice single-chain magnet with twisted easy planes
https://doi.org/10.17586/2220-8054-2020-11-6-659-665
Abstract
An analytical solution for the spin-wave spectrum of the two-sublattice 1D magnet with SA=SB =1 and twisting easy planes has been obtained. Such planes are mutually twisted by an angle ϕ relative to each other. For the case of mutually orthogonal easy planes ϕ = π/2, the spectrum vs. quasi-momentum dependence has been compared with that of an easy-axis magnet with the easy axis aligned along the line of intersection of the planes. An analogy of the spectra of the models has been shown, indicating the possibility of the effective easy axis anisotropy in easy-plane two-sublattice single-chain magnets.
Supporting agencies: S.M.S. expresses deep gratitude to V.V. Val’kov. The main results of this work were with substantial use of the theory developed by him (see for example articles [10], [12] and references given in them), as well as on his previous advice. S.M.S. and M.N.P. acknowledges the support from the Foundation for the Advancement of Theoretical Physics and Mathematics “BASIS” (Grants No. 20-1-4-25-1 and 19-1-1-12-2, respectively).
About the Authors
M. S. Shustin
L.V. Kirensky Institute of Physics
Russian Federation
Russian Federation
660036, Krasnoyarsk
M. N. Potkina
ITMO University, Kronverkskiy; St. Petersburg State University; Science Institute and Faculty of Physical Sciences
Russian Federation
Russian Federation
49, St. Petersburg, 197101
St. Petersburg, 198504
Univ. of Iceland 107 Reykjav´ık, Iceland
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For citations:
Shustin M.S., Potkina M.N. Effective easy-axis anisotropy of the two-sublattice single-chain magnet with twisted easy planes. Nanosystems: Physics, Chemistry, Mathematics. 2020;11(6):659–665. https://doi.org/10.17586/2220-8054-2020-11-6-659-665
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