作者: Hideo Hasegawa
DOI: 10.1143/JPSJ.46.1504
关键词: Paramagnetism 、 Ferromagnetism 、 Magnetic moment 、 Electron 、 Density of states 、 Spin-½ 、 Condensed matter physics 、 Physics 、 Transition metal 、 Atom 、 General Physics and Astronomy
摘要: Itinerant-electron ferromagnetism at finite temperatures is discussed by using the functional-integral method with two fields within static and saddle-point approximations combined single-site approximation; a single atom of pure metal regarded as an impurity embedded in host which treated kind alloy-analogy approximation. The amplitude local magnetic moment shown to have weak temperature dependence remain even paramagnetic state, where spin susceptibility obeys approximate Curie-Weiss law. Numerical calculations are made use simplified model for density states bcc transition metals. Calculated results reference experimental data iron.