Crystal structures and magnetic performance of nanocrystalline Sm–Co compounds

doi:10.1007/s11706-012-0171-7

Front Mater Sci

2012, Vol. 6

Issue (3) : 207-215 https://doi.org/10.1007/s11706-012-0171-7

REVIEW ARTICLE

Crystal structures and magnetic performance of nanocrystalline Sm–Co compounds

Xiao-Yan SONG(

), Zhe-Xu ZHANG, Nian-Duan LU, Hai-Ning LIANG, Ding-Peng LI, Xiang-Quan YAN, Jiu-Xing ZHANG

College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials (Ministry of Education), Beijing University of Technology, Beijing 100124, China

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Abstract

A variety of intermetallic compounds in the binary Sm–Co system were reviewed, and the contents were focused on the crystal structures, magnetic properties and the nanoscale effects. The representative nanocrystalline Sm–Co compounds were introduced in details, the diagrams for their lattice structures and the atomic sites and occupancies were provided. Moreover, the magnetic properties of the nanocrystalline Sm–Co compounds were compared with those of the conventional polycrystalline counterparts. It showed that the nanocrystalline Sm–Co compounds exhibit special phase stability and remarkably enhanced magnetic performance, which are promising candidates for the matrix phases to develop permanent magnets, particularly the advanced high-temperature magnetic materials.

Keywords Sm–Co compounds nanoscale crystal structure magnetic performance

Corresponding Author(s): SONG Xiao-Yan,Email:xysong@bjut.edu.cn

Issue Date: 05 September 2012

Cite this article:

Zhe-Xu ZHANG,Nian-Duan LU,Hai-Ning LIANG, et al. Crystal structures and magnetic performance of nanocrystalline Sm–Co compounds[J]. Front Mater Sci, 2012, 6(3): 207-215.

URL:

https://academic.hep.com.cn/foms/EN/10.1007/s11706-012-0171-7
https://academic.hep.com.cn/foms/EN/Y2012/V6/I3/207

Fig.1 Crystal unit cell of the nanocrystalline SmCo compound, with the dashed rectangles illustrating the local equivalent atom configuration. (Reproduced with permission from Ref. [], Copyright 2010 IOP Publishing) Magnetization hysteresis loops of the coarse-grained polycrystalline and nanocrystalline SmCo compounds at the room temperature.

Fig.2 Crystal unit cell of nanocrystalline SmCo compound. (Reproduced with permission from Ref. [], Copyright 2010 Elsevier) (b) Magnetization hysteresis loops of the coarse-grained polycrystalline and nanocrystalline SmCo compounds at the room temperature.

Tab.1 Atom sites and occupancy ratios in the lattice cell of the nanocrystalline SmCo compound (hexagonal), from Rietveld refinement

Fig.3 Crystal unit cell of nanocrystalline SmCo compound. (Reproduced with permission from Ref. [], Copyright 2009 International Union of Crystallography) (b) Magnetization hysteresis loops of the coarse-grained polycrystalline and nanocrystalline SmCo compounds at the room temperature. (Reproduced with permission from Ref. [], Copyright 2009 American Institute of Physics)

Tab.2 Atom sites and occupancy ratios in the lattice cell of the nanocrystalline SmCo compound (hexagonal), from Rietveld refinement

Fig.4 Crystal unit cell of nanocrystalline SmCo compound. Magnetization hysteresis loop of the nanocrystalline SmCo compound at the room temperature. Inset: the enlargement of local magnetization hysteresis loop. Temperature dependence of magnetization of the nanocrystalline SmCo compound in a field of 5 kOe. (Reproduced with permission from Ref. [], Copyright 2011 American Institute of Physics)

Tab.3 Atom sites and occupancy ratios in the lattice cell of the nanocrystalline SmCo compound (hexagonal), from Rietveld refinement

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