Magnetisation and magnetovolume effect in amorphous R<sub>0.2</sub>Fe<sub>0.8</sub> (R identical to Y, Pr, Nd, Sm, Gd, Tb, Dy and Er) alloys
S Ishio; X Yang; T Miyazaki; S Ishio; Dept. of Appl. Phys., Tohoku Univ., Sendai, Japan; X Yang; Dept. of Appl. Phys., Tohoku Univ., Sendai, Japan; T Miyazaki; Dept. of Appl. Phys., Tohoku Univ., Sendai, Japan
Журнал:
Journal of Physics: Condensed Matter
Дата:
1989-11-13
Аннотация:
Magnetisation, thermal expansion and forced volume magnetostriction of amorphous R<sub>0.2</sub>Fe<sub>0.8</sub>(R identical to Y, Pr, Nd, Sm, Gd, Tb, Dy and Er) alloys have been measured to make clear the contribution of R elements to both the Fe moment m<sub>Fe</sub> and the magnetovolume effect. The value of m<sub>Fe</sub> in these alloys ranges from 1.6 mu <sub>B</sub> to 2.3 mu <sub>B</sub>, depending on the R elements. All R<sub>0.2</sub>Fe<sub>0.8</sub> alloys show an Invar property. The forced volume magnetostriction at about Curie temperature shows the same R dependence of the mean magnetic moment m. The local environmental effect on the Fe moment in the amorphous state is discussed in comparison with the corresponding crystalline R-Fe compounds.
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