The magnetic and structural properties of the magnetic shape memory compound Ni2Mn1.44Sn0.56

P. J. Brown, A. P. Gandy, K. Ishida, R. Kainuma, T. Kanomata, K. U. Neumann, K. Oikawa, B. Ouladdiaf, K. R.A. Ziebeck

研究成果: Article

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Magnetization and high resolution neutron powder diffraction measurements on the magnetic shape memory compound Ni2Mn1.44Sn 0.56 have confirmed that it is ferromagnetic below 319 K and undergoes a structural phase transition which takes place at TM ≤ 221 K on cooling and 239 K on warming. The high temperature phase has the cubic L 21 structure, a ≤ 5.973 Å, with the excess manganese atoms occupying the 4(b) tin sites. In the cubic phase at 245 K the manganese moments at both sites were found to be ferromagnetically aligned. The magnetic moment at the 4(a) sites was 1.88(10) μB but it was only 0.53(18) μB/Mn at the 4(b) sites. The low temperature phase stable below TM has an orthorhombic structure with space group Pmma related to the cubic phase through a Bain transformation aortho ≤ (a cub+bcub)/2; bortho ≤ ccub; cortho ≤ (acub- bcub). The change in cell volume in the transition is only ≈0.5%, suggesting that the atomic moments are unchanged although the spontaneous magnetization drops significantly.

元の言語English
ページ(範囲)2249-2259
ページ数11
ジャーナルJournal of Physics Condensed Matter
18
発行部数7
DOI
出版物ステータスPublished - 2006 2 22

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

フィンガープリント The magnetic and structural properties of the magnetic shape memory compound Ni<sub>2</sub>Mn<sub>1.44</sub>Sn<sub>0.56</sub>' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

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    Brown, P. J., Gandy, A. P., Ishida, K., Kainuma, R., Kanomata, T., Neumann, K. U., Oikawa, K., Ouladdiaf, B., & Ziebeck, K. R. A. (2006). The magnetic and structural properties of the magnetic shape memory compound Ni2Mn1.44Sn0.56. Journal of Physics Condensed Matter, 18(7), 2249-2259. https://doi.org/10.1088/0953-8984/18/7/012