Structure and magnetism of c-plane oriented mn50(Te50-xSbx) epitaxial thin films with NiAs-type structure

Y. Ashizawa, S. Saito, M. Tsunoda, M. Takahashi

Research output: Contribution to journalArticlepeer-review

Abstract

Structure, magnetism, and their correlation for NiAs-type Mn50(Te50-xSbx) pseudo-single crystal films were investigated by changing the nearest Mn-Mn distance by substituting Te for Sb. The main results were as follows. First, c-plane oriented Mn50(Te50-xSbx) pseudo-single crystal films were prepared in ranges of Sb composition, x, from 0 to 16 and from 33 to 51 by employing a c-plane oriented NiAs-type MnTe under-layer. Second, lattice parameter a of the Mn50(Te50-xSbx) films was nearly constant at about 4.17 Å for 0 ≤ x ≤ 38 and reduced gradually down to 4.13 Å for x ≥ 38 as x increased. Lattice parameter c decreased with a gentle slope from 6.68 to 6.61 Å for 0 ≤ x ≤ 16 and reduced gradually down to 5.78 Å for x ≥ 23. As a result, dMn-Mn changed from 3.34 Å to 2.89 Å. Third, the saturation magnetic moments mS at 5 K linearly increased with a different slope as x increased for 0 ≤ x ≤ 11 and 33 ≤ x ≤ 51. Finally, the coefficient of T3/2 in Bloch’s law A decreased rapidly for x ≤ 16 as x increased, and it increased gradually for 16 ≤ x ≤ 51 as x decreased.

Original languageEnglish
Pages (from-to)21-24
Number of pages4
JournalJournal of the Magnetics Society of Japan
Volume43
Issue number2
DOIs
Publication statusPublished - 2019

Keywords

  • Epitaxial growth
  • Mn-Mn distance
  • MnSb
  • MnTe
  • NiAs-type structure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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