Anomalous temperature behavior of the chiral spin helix in CrNb3S6 thin lamellae

Togawa, Y., Kishine, J., Nosov, P.A., Koyama, T., Paterson, G.W. , McVitie, S. , Kousaka, Y., Akimitsu, J., Ogata, M. and Ovchinnikov, A.S. (2019) Anomalous temperature behavior of the chiral spin helix in CrNb3S6 thin lamellae. Physical Review Letters, 122(1), 017204. (doi:10.1103/PhysRevLett.122.017204)

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Abstract

Using Lorentz transmission electron microscopy and small-angle electron scattering techniques, we investigate the temperature-dependent evolution of a magnetic stripe pattern period in thin-film lamellae} of the prototype monoaxial chiral helimagnet CrNb 3 S 6 . The sinusoidal stripe pattern appears due to formation of a chiral helimagnetic order (CHM) in this material. We found that as the temperature increases, the CHM period is initially independent of temperature and then starts to shrink above the temperature of about 90 K}, which is far below the magnetic phase transition temperature for the bulk material, T c (123~K)}. The stripe order disappears at around 140~K, far above T c . We argue that this cascade of transitions reflects a three-stage hierarchical behavior of melting in two dimensions.

Item Type:Articles
Additional Information:Y. T. and J. K. acknowledge support from Grant-in-Aids for Scientific Research (Nos. 25220803, 17H02767, 17H02923). A. S. O. and P. A. N. acknowledge funding by the RFBR, Grant No. 17-52-50013, and the Foundation for the Advancement to Theoretical Physics and Mathematics BASIS Grant No. 17-11-107. This work was supported by Chirality Research Center (Crescent) in Hiroshima University. The work was also supported by the Government of the Russian Federation Program 02.A03.21.0006, JSPS and RFBR under the Japan - Russia Research Cooperative Program, JSPS Core-to-Core Program, A. Advanced Research Networks, and UK research council, EPSRC, grant EP/M024423/1.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:McVitie, Professor Stephen and Paterson, Dr Gary and Togawa, Dr Yoshihiko
Authors: Togawa, Y., Kishine, J., Nosov, P.A., Koyama, T., Paterson, G.W., McVitie, S., Kousaka, Y., Akimitsu, J., Ogata, M., and Ovchinnikov, A.S.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN:0031-9007
ISSN (Online):1079-7114
Published Online:09 January 2019
Copyright Holders:Copyright © 2019 American Physical Society
First Published:First published in Physical Review Letters 122(1): 017204
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
683531Consortium for advanced materials based on spin chiralityRobert StampsEngineering and Physical Sciences Research Council (EPSRC)EP/M024423/1S&E P&A - PHYSICS & ASTRONOMY