Neutron diffraction study of Sr2Mn2O5

Takanori Mori, Kazuko Inoue, Naoki Kamegashira, Yasuo Yamaguchi, Kenji Ohoyama

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

The crystal and magnetic structure of SrMnO2.5 has been investigated by neutron power diffraction from 20 to 425 K. The compound has orthorhombic crystal structure with the unit cell dimensions a = 0.55307(4), b = 1.07829(8), c = 0.38145(3) nm at 425 K, where space group is Pbam and Z = 4. Below TN = 375 K, an antiferromagnetic order occurs and the magnetic unit cell is orthorhombic with the dimensions am = ac, bm = bc, cm = 2cc, where ac, bc and cc are the parameters of the crystallographic unit cell. The ferromagnetic and antiferromagnetic coupling coexist in the c-plane according to the difference of Mn-O-Mn angle and the coupling between adjacent planes is antiferromagnetic. The direction of the magnetic moments is along the crystallographic b-axis. The magnitude of magnetic moment at 20 K is 3.44 μB/Mn.

Original languageEnglish
Pages (from-to)92-97
Number of pages6
JournalJournal of Alloys and Compounds
Volume296
Issue number1-2
DOIs
Publication statusPublished - 2000 Jan 10

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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