EXCHANGE AND CRYSTAL-FIELD INTERACTIONS IN SM2FE17N3-DELTA

被引：13

作者：

LI, HS

CADOGAN, JM

机构：

[1] School of Physics, The University of New South Wales, Kensington

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1992年 / 103卷 / 1-2期

基金：

澳大利亚研究理事会;

关键词：

D O I：

10.1016/0304-8853(92)90235-G

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Exchange and crystal field interactions in SM2Fe17N3-delta have been studied based on a first-principles model in which the three lowest J-multiplets for the Sm3+ ion were included. A value of (300 +/- 5)mu-0 for the exchange coefficient n(SmFe) was deduced from the measured Curie temperature. The K1Fe(T) data were determined for Y2Fe17N3-delta from magnetic measurements over the temperature range of 4.2-400 K, and the value of K1Fe at 4.2 K is -1.3 MJ/m3. A set of the leading crystal field coefficients A20, A40 and A60 has been determined from the best fit to the experimental temperature dependence of the anisotropy field in Sm2Fe17N3-delta. We find that A20 = -(160 +/- 5) K a0(-2), A40 = +(8.0 +/- 1.0) K a0(-4) and A60 = -(3.0 +/- 1.0) K a0(-6).

引用

页码：53 / 57

页数：5

共 28 条

[11]

GUBBENS PCM, 1990, J MAGN MAGN MATER, V67, P255

[12] SYNTHESIS AND MAGNETIC-PROPERTIES OF TERNARY CARBIDES PR2FE14C, SM2FE14C, GD2FE14C, TB2FE14C, DY2FE14C, HO2FE14C, ER2FE14C, TM2FE14C, LU2FE14C WITH ND2FE14B STRUCTURE TYPE [J].