Spin-flop multicritical phenomena in Mn2 AS4 (A = Si and Ge)

K. Ohgushi, Y. Ueda

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Magnetic properties of Mn2 AS4 (A = Si and Ge) with the olivine structure are elucidated by depicting the phase diagram associated with a spin-flop transition. Both compounds show a sudden decrease of the spin-flop field near the Néel temperature, which gives rise to anomalous magnetic responses along the c-axis: a spontaneous weak ferromagnetism in A = Si and a significant enhancement of the differential susceptibility under the small magnetic field in A = Ge. We also discuss the nature of two types of unusual multicritical points in the phase diagrams.

Original languageEnglish
Pages (from-to)1291-1292
Number of pages2
JournalJournal of Magnetism and Magnetic Materials
Issue number2 SUPPL. PART 2
Publication statusPublished - 2007 Mar


  • Multicritical phenomena
  • Olivine
  • Spin-flop transition
  • Weak ferromagnetism


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