Magnetic ordering and exchange interaction of Laves compounds Sm(0.9)Pr(0.1)(Fe(1-x)Co(x))(2)

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	Magnetic ordering and exchange interaction of Laves compounds Sm(0.9)Pr(0.1)(Fe(1-x)Co(x))(2)
	Z. J. Guo; Z. D. Zhang; X. G. Zhao; X. P. Song; B. W. Wang; X. M. Jin; D. Y. Geng
	2002
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	18 期号:3 页码:219-224
摘要	Structure, magnetic properties and magnetostriction of Sm(0.9)Pr(0.1)(Fe(1-x)Co(x))(2) compounds have been investigated by means of X-ray diffraction, a.c. initial susceptibility, extracting sample magnetometer, Mossbauer Spectroscopy and standard strain gauge techniques. The lattice parameter a of the MgCu(2)-type Laves compounds Sm(0.9)Pr(0.1)(Fe(1-x)Co(x))(2) decreases nonlinearly with increasing Co concentration, deviating from the Vegard's law. Curie temperature T, increases initially from 668 K for x=0 to 694 K for x=0.2 and then decreases to 200 K for x=1.0. The saturation magnetization M. at temperatures 1.5 K, 77 K and 300 K have the same variation tendency as the composition dependence of Curie temperature, in consistence with rigid-band model. The easy magnetization direction (EMD) of Sm(0.9)Pr(0.1)(Fe(1-x)Co(x))(2) lies along [111] direction in the range xless than or equal to0.6, and changes to [110] for x=0.8, while Sm(0.9)Pr(0.1)Co(2) stays in the paramagnetic state at room temperature. The composition dependence of the average hyperfine field, H(hf), demonstrates a similar variation tendency as that of the saturation magnetization M(s) and Curie temperature T(c). The spontaneous magnetostricton lambda(111) increases with increasing Co content. The saturation magnetostriction lambda(s) decreases monotonically with increasing x, which is caused by the increase of magnetostriction constant lambda(100) with opposite sign to that of lambda(111). A two-sublattice model has been proposed to understand the intermediate region between the [111] and [110] spin configurations, which can also be used to explain the temperature dependence of magnetization.
部门归属	chinese acad sci, inst met res, int ctr mat phys, shenyang 110016, peoples r china.;zhang, zd (reprint author), chinese acad sci, inst met res, int ctr mat phys, shenyang 110016, peoples r china;zdzhang@imr.ac.cn
关键词	Sm(0.9)Pr(0.1)(Fe(1-x)Co(x))(2) Magnetic Ordering Exchange Interaction Phase Intermetallic Compounds Rare-earth Magnetoelastic Properties Giant Magnetostriction Hyperfine Interactions Electrical-properties Spin Reorientation Single Crystals Anisotropy Iron
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36280
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. J. Guo,Z. D. Zhang,X. G. Zhao,et al. Magnetic ordering and exchange interaction of Laves compounds Sm(0.9)Pr(0.1)(Fe(1-x)Co(x))(2)[J]. Journal of Materials Science & Technology,2002,18(3):219-224.
APA	Z. J. Guo.,Z. D. Zhang.,X. G. Zhao.,X. P. Song.,B. W. Wang.,...&D. Y. Geng.(2002).Magnetic ordering and exchange interaction of Laves compounds Sm(0.9)Pr(0.1)(Fe(1-x)Co(x))(2).Journal of Materials Science & Technology,18(3),219-224.
MLA	Z. J. Guo,et al."Magnetic ordering and exchange interaction of Laves compounds Sm(0.9)Pr(0.1)(Fe(1-x)Co(x))(2)".Journal of Materials Science & Technology 18.3(2002):219-224.