Abstract
Precise magnetization measurements of a half-metallic ferromagnet with the Heusler type structure have been carried out under pressure up to 1.27 GPa. At ambient pressure, the spontaneous magnetic moment and the Curie temperature are experimentally obtained to be /f.u. and K, respectively. The is independent of applying pressure. The decreases with the increase of pressure and the pressure derivative of the Curie temperature is estimated to be K/GPa. Furthermore, the pressure effect on the electronic and magnetic properties of has been theoretically investigated on the basis of first-principles density functional calculations by using the projector augmented wave method in order to evaluate the half metallicity of . Both the experimental and the theoretical results under pressure reveal that is half metal. The experimental results of pressure-dependent magnetic properties are finally discussed on the basis of the spin fluctuation theory for itinerant electron magnetism.
1 More- Received 2 October 2017
- Revised 20 February 2018
DOI:https://doi.org/10.1103/PhysRevB.97.104414
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