Field driven recovery of the collective spin dynamics of the chiral soliton lattice

Goncalves, F.J.T., Shimamoto, Y., Sogo, T., Paterson, G.W. , Kousaka, Y. and Togawa, Y. (2020) Field driven recovery of the collective spin dynamics of the chiral soliton lattice. Applied Physics Letters, 116(1), 012403. (doi: 10.1063/1.5131067)

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We investigate the magnetic field dependence of the spin excitation spectra of the chiral soliton lattice (CSL) in the helimagnet CrNb3S6, by means of microwave resonance spectroscopy. The CSL is a prototype of a noncollinear spin system that forms periodically over a macroscopic length scale. Following the field initialization of the CSL, we found three collective resonance modes over an exceptionally wide frequency range. Upon further reducing the magnetic field toward 0 T, the spectral weight of these collective modes was disrupted by the emergence of additional resonances whose Kittel-like field dependence was linked to coexisting field polarized magnetic domains. The collective behavior at a macroscopic level was only recovered upon reaching the helical magnetic state at 0 T. The magnetic history of this noncollinear spin system can be utilized to control microwave absorption, with potential use in magnon-driven devices.

Item Type:Articles
Additional Information:The authors acknowledge the support from the Grant-in-Aid for Scientific Research (Nos. 25220803, 17H02767, and 17H02923), Chirality Research Center (Crescent) in Hiroshima University. FG received support from JSPS International Research Fellowship No. 17F17316 and GWP received support from EPSRC Grant No. EP/M024423/1.
Glasgow Author(s) Enlighten ID:Togawa, Dr Yoshihiko and Paterson, Dr Gary and Sogo, Mr Tadayuki
Authors: Goncalves, F.J.T., Shimamoto, Y., Sogo, T., Paterson, G.W., Kousaka, Y., and Togawa, Y.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Applied Physics Letters
Publisher:AIP Publishing
ISSN (Online):1077-3118
Copyright Holders:Copyright © 2019 AIP
First Published:First published in Applied Physics Letters 116:012403
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
190883Consortium for advanced materials based on spin chiralityStephen McVitieEngineering and Physical Sciences Research Council (EPSRC)EP/M024423/1P&S - Physics & Astronomy