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Structure and magnetic properties of Sm2Fe17-xCrxcompound prepared by arc melting

Hao Yan-Ming An Li-Qun Wang Ling-Ling Yan Da-Li

Structure and magnetic properties of Sm2Fe17-xCrxcompound prepared by arc melting

Hao Yan-Ming, An Li-Qun, Wang Ling-Ling, Yan Da-Li
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Publishing process
  • Received Date:  23 December 2008
  • Accepted Date:  17 February 2009
  • Published Online:  05 May 2009

Structure and magnetic properties of Sm2Fe17-xCrxcompound prepared by arc melting

  • 1. (1)天津科技大学理学院物理部,天津 300222; (2)天津师范大学物理系,天津 300384

Abstract: The structural and magnetic properties of Sm2Fe17-xCrx compound have been investigated by means of x-ray diffraction and magnetization measurements. The results show that the Sm2Fe17-xCrx (x=1—3) compounds annealed at 1050 ℃ for 5 days have a rhomhedral Th2Zn17-type structure,and the Sm2Fe17-xCrx(x=25, 30) compounds annealed at 1050 ℃ for 7 days have a monoclinic Nd3(Fe,Ti)29-type structure. Long annealing time and high content of Cr can make the Sm-Fe-Cr compound with a Nd3(Fe,Ti)29-type structure become very stable. This is quiet different from the R2Fe17-xCrx compound (R is a heavy rare earth element). The analysis of unit-cell volume and unit-cell parameters show that there exists a strong anisotropic magneto-volume effect in Sm2Fe17-xCrx compounds. The result of magnetization measurement shows that the effects of the substituting Cr for Fe at dumbbell sites on the Curie temperature and the magneto-crystalline anisotropy of the compound with Th2Ni17-type structure are greater than that of the compound with Th2Zn17-type structure.

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