Frustrated magnetism of pharmacosiderite comprising tetrahedral clusters arranged in the primitive cubic lattice

Ryutaro Okuma, Takeshi Yajima, Tatsuo Fujii, Mikio Takano, Zenji Hiroi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We show that pharmacosiderite is a novel cluster antiferromagnet comprising frustrated regular tetrahedra consisting of spin-5=2 Fe3+ ions arranged in the primitive cubic lattice. The connectivity of the tetrahedra and inter-cluster interaction of 2.9 K, which is significantly large compared with the intra-cluster interaction of 10.6 K, provide a unique platform for frustration physics. An unconventional antiferromagnetic order is observed below TN ~ 6 K, accompanied by a weak ferromagnetic moment and large fluctuation, as demonstrated by Mössbauer spectroscopy. A q = 0 magnetic order with a total S = 0 for the tetrahedral cluster is proposed based on an irreducible representation analysis, which may explain the origin of the weak ferromagnetism and fluctuation.

Original languageEnglish
Pages (from-to)937021-937024
Number of pages4
JournalJournal of the Physical Society of Japan
Volume87
Issue number9
DOIs
Publication statusPublished - Jan 1 2018

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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