Cubic to hexagonal tuning in Fe2Mn(Si1−xGex) Heusler alloys

B. Pimentel,V. M. Andrade,V. G. de Paula,K. R. Pirota,F. Beron, M. A. Cardoso,J. N. Goncalves,J. S. Amaral,A. M. dos Santos,M. S. Reis

Journal of Alloys and Compounds（2022）

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摘要

•Construction of a phase diagram for the Fe2Mn(Si1−xGex) family compounds.•Critical volume of ~ 12 Å3/atom per unit cell for the formation of hexagonal phase.•Saturation magnetization enhancement from 2.3 μB/F.U. (x=0) to 5.5 μB/F.U. (x=1).•High Curie temperatures for the hexagonal phase due to magnetocrystalline anisotropy.•DFT calculation qualitatively reproduces the experimental behavior of Tc and Ms.

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关键词

Heusler alloys,Hexagonal structure,Phase stabilization

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