A new semi-Heusler ferromagnet NiFeSb: electronic structure, magnetism and transport properties

摘要

We report on structural, magnetic, transport, and spin polarization measurements of a new semi-Heusler alloy NiFeSb, which was synthesized successfully by means of electron melt-spinning technique although its ferromagnetic state and crystal structure was predicted to be unstable by the band calculation. The temperature-dependent measurement of magnetizations can both be interpreted well by the spin-wave theory. The electrical resistivity follows a T-5 behavior at low temperatures. Point contact Andreev reflection measurements of the spin polarization yield moderate polarization of 52. (C) 2003 Elsevier Ltd. All rights reserved. References: 26