Magnetovolume effect in intermetallics LaFe13-xSix

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	Magnetovolume effect in intermetallics LaFe13-xSix
	Jia, L ; Sun, JR ; Zhang, HW ; Hu, FX ; Dong, C ; Shen, BG
刊名	JOURNAL OF PHYSICS-CONDENSED MATTER
	2006
卷号	18 期号:44 页码:9999
关键词	MAGNETIC ENTROPY CHANGE METAMAGNETIC TRANSITION COMPOUND LAFE11.4SI1.6 DIFFRACTION
ISSN号	0953-8984
通讯作者	Sun, JR: Chinese Acad Sci, State Key Lab Magnetism, Inst Phys, Beijing 100080, Peoples R China.
中文摘要	Based on the Bean-Rodbell model, which assumes a linear variation of exchange coupling with atom spacing, the magnetovolume effects in LaFe13-xSix (x = 1.2-2.0) have been systematically studied. A relation between phase volume and magnetization is first obtained by comparing the structural and magnetic data collected at various temperatures. The maximum spontaneous magnetostriction thus derived is dependent on the content of Si, linearly decreasing from similar to 2.15% for x = 1.2 to similar to 1.12% for x = 2. Based on these results and limited experimental data, the parameters involved in the Bean-Rodbell model are determined for the LaFe13-xSix compounds. Further analysis indicates that the Bean-Rodbell model equipped with these parameters gives a satisfactory description of the magnetovolume effects produced by interstitial hydrogen for the LaFe11.44Si1.56 hydride. To explain the pressure effects, in contrast, changes of the parameters under pressure, which are a result of the enhancement of the first-order character of the phase transition, have to be taken into account. These results indicate that either the increase or the decrease of the Curie temperature is simply a consequence of the variation of the phase volume due to the introduction of interstitial atoms or the application of a high pressure, and can be described well by the Bean-Rodbell model.
收录类别	SCI
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/41713]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Jia, L,Sun, JR,Zhang, HW,et al. Magnetovolume effect in intermetallics LaFe13-xSix[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2006,18(44):9999.
APA	Jia, L,Sun, JR,Zhang, HW,Hu, FX,Dong, C,&Shen, BG.(2006).Magnetovolume effect in intermetallics LaFe13-xSix.JOURNAL OF PHYSICS-CONDENSED MATTER,18(44),9999.
MLA	Jia, L,et al."Magnetovolume effect in intermetallics LaFe13-xSix".JOURNAL OF PHYSICS-CONDENSED MATTER 18.44(2006):9999.