Magnetic ordering and exchange interaction of Laves compounds Sm0.9Pr0.1(Fe1-xCox)(2)
Guo, ZJ; Zhang, ZD; Zhao, XG; Song, XP; Wang, BW; Jin, XM; Geng, DY
Corresponding AuthorZhang, ZD(
AbstractStructure, magnetic properties and magnetostriction of Sm0.9Pr0.1(Fe1-xCox)(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 MgCu2-type Laves compounds Sm0.9Pr0.1(Fe1-xCox)(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 Sm0.9Pr0.1(Fe1-xCox)(2) lies along [111] direction in the range xless than or equal to0.6, and changes to [110] for x=0.8, while Sm0.9Pr0.1Co2 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.
KeywordSm0.9Pr0.1(Fe1-xCox)(2) magnetic ordering exchange interaction
Indexed BySCI
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000176003400006
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Document Type期刊论文
Corresponding AuthorZhang, ZD
AffiliationChinese Acad Sci, Inst Met Res, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
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GB/T 7714
Guo, ZJ,Zhang, ZD,Zhao, XG,et al. Magnetic ordering and exchange interaction of Laves compounds Sm0.9Pr0.1(Fe1-xCox)(2)[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2002,18(3):219-224.
APA Guo, ZJ.,Zhang, ZD.,Zhao, XG.,Song, XP.,Wang, BW.,...&Geng, DY.(2002).Magnetic ordering and exchange interaction of Laves compounds Sm0.9Pr0.1(Fe1-xCox)(2).JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,18(3),219-224.
MLA Guo, ZJ,et al."Magnetic ordering and exchange interaction of Laves compounds Sm0.9Pr0.1(Fe1-xCox)(2)".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 18.3(2002):219-224.
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