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

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

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6 Citations (Scopus)


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
Issue number7
Publication statusPublished - 2010 Apr


  • Magnetic phase diagram
  • Multicriticality
  • Neutron scattering


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