Magnetic phase diagrams of the multicritical olivine Mn2 SiS4 and Mn2 GeS4

J. H. Chung, K. Ohgushi, Y. Ueda

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Using single crystal neutron diffraction, we studied the H (∥ b) - T phase diagram of the antiferromagnetic olivine Mn2 AS4 (A = Si, Ge). We identified the two spin-flop phases at high fields that are separated by field-independent phase boundaries terminated at multicritical points. In the low temperature phase, the magnetic structures consist of antiferromagnetic Cz - Cz and ferromagnetic Fx components. In the high temperature phase, in contrast, they are replaced by Cx - Cx and Fz. The absence of the anomalies in the DC magnetization data across the spin-reorientation transitions is discussed in terms of the Clausius-Clapeyron relation.

Original languageEnglish
Pages (from-to)832-837
Number of pages6
JournalJournal of Magnetism and Magnetic Materials
Volume322
Issue number7
DOIs
Publication statusPublished - 2010 Apr

Bibliographical note

Funding Information:
We are grateful for helpful discussion with T. Sakakibara. We also acknowledge the support of the National Institute of Standards and Technology, U.S. Department of Commerce, in providing the neutron research facilities used in this work. This work is supported by the Korean Government (MEST) through the Grant no. 20090062204 and the BAERI program.

Keywords

  • Magnetic phase diagram
  • Multicriticality
  • Neutron scattering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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