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Magnetic properties of Heusler alloys Ru2-xFexCrSi
Kazuhisa Matsuda1, Masahiko Hiroi, Masayuki Kawakami
1Department of Physics, Faculty of Science, Kagoshima University, Kagoshima 890-0065, Japan.
Abstract:
We report on the structural and magnetic properties of newly synthesized Heusler alloys, Ru2-xFexCrSi, which have quite recently been shown to be candidates for ferromagnetic metals with high spin polarization from band structure calculations. Polycrystalline samples of Heusler alloys Ru2-xFexCrSi were prepared for 0.5≤x≤1.8. They were found to have L21 structures for 0.5≤x≤1.5 and B2 for x = 1.8. Magnetic measurements showed that they are ferromagnets. The Curie temperature for x = 1.0 was found to be 370 K. The Curie temperature tends to increase with increasing Fe concentration x. The saturation magnetic moment increases almost linearly as x increases. For higher Fe concentration the saturation magnetic moment is close to 2 μB per formula unit, which is theoretically expected.
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