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  • Letter

Element-specific field-induced spin reorientation and tetracritical point in MnCr2S4

Sh. Yamamoto1,*, H. Suwa2, T. Kihara3, T. Nomura1,4, Y. Kotani5, T. Nakamura3,5, Y. Skourski1, S. Zherlitsyn1, L. Prodan6,7 et al.

V. Tsurkan6,7, H. Nojiri3, A. Loidl7, and J. Wosnitza1,8

  • 1Hochfeld-Magnetlabor Dresden (HLD-EMFL) and Würzburg-Dresden Cluster of Excellence ct.qmat, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
  • 2Department of Physics, The University of Tokyo, Tokyo 113-0033, Japan
  • 3Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
  • 4Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
  • 5Japan Synchrotron Radiation Research Institute, SPring-8, Sayo, Hyogo 679-5198, Japan
  • 6Institute of Applied Physics, MD 2028, Chisinau, R. Moldova
  • 7Experimental Physics 5, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, 86159 Augsburg, Germany
  • 8Institut für Festkörper- und Materialphysik, TU Dresden, 01062 Dresden, Germany

  • *s.yamamoto@hzdr.de
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Phys. Rev. B 103, L020408 – Published 25 January, 2021

DOI: https://doi.org/10.1103/PhysRevB.103.L020408

Abstract

The ferrimagnetic spinel MnCr2S4 shows a variety of magnetic-field-induced phase transitions owing to bond frustration and strong spin-lattice coupling. However, the site-resolved magnetic properties at the respective field-induced phases in high magnetic fields remain elusive. Our soft x-ray magnetic circular dichroism studies up to 40 T directly evidence element-selective magnetic-moment reorientations in the field-induced phases. The complex magnetic structures are further supported by entropy changes extracted from magnetocaloric-effect measurements. Moreover, thermodynamic experiments reveal an unusual tetracritical point in the H−T phase diagram of MnCr2S4 due to strong spin-lattice coupling.

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Phys. Rev. B 103, L020408– Published 25 January, 2021
  • Received 4 August 2020
  • Revised 3 December 2020
  • Accepted 11 January 2021
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