Conical-to-ferromagnetic phase conversion induced by cation order–disorder transition in Hf1–xTixMnSb2

Taito Murakami, Takafumi Yamamoto, Amit Kumar, Seikh M. Yusuf, Hiroshi Kageyama

Research output: Contribution to journalArticlepeer-review


The relation between metal order-disorder and magnetic properties in the solid solution Hf1–xTixMnSb2 (0 ≤ x ≤ 1) with the NiAs structure is investigated. The synchrotron X-ray diffraction studies have revealed that two-dimensional (2D) metal-ordered structure in HfMnSb2 persists up to x = 0.15, though its degree of metal order decreases with x. Although the NiAs-like phase is not formed for 0.2 ≤ x ≤ 0.3, a metal disordered phase appears for x ≥ 0.4. A conical spin order is only found in the metal-ordered region and is fairly robust against partial cation disorder, while the completely metal-disordered region is a ferromagnetic state, providing firm evidence that the presence/absence of metal order essentially defines the ground state. Neutron depolarization measurement for HfMnSb2 suggests possible successive phase transitions.

Original languageEnglish
Pages (from-to)190-194
Number of pages5
JournalJournal of Solid State Chemistry
Publication statusPublished - 2018 Jul
Externally publishedYes


  • Antimonide
  • Magnetism
  • NiAs structure
  • Order-disorder transition

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry


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