Microstructure and domain structures of Sm0.56GdxDy0.44-x(Co0.68Fe 0.22Cu0.08Zr0.02)7.22 magnets with low temperature coefficients

Jinbo Yang, Changguo Ji, Weihua Mao, Yingchang Yang, Hai Xu, Baoshan Han, Wei Li, Xiaojun Yu

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6 Scopus citations

Abstract

The microstructure and domain structures of high performance temperature-compensated sintered magnets with composition of Sm0.56GdxDy0.44-x(TM)7.22 (TM=Co0.68Fe0.22Cu0.08Zr0.02) 7.22 (0.0 ≤x≤0.4) have been investigated by using electron microscopy and magnetic force microscopy. Both microstructure and magnetic properties of these magnets show a significant dependence on the content of heavy rare earth Gd and Dy. The intrinsic coercive force increases significantly with increasing Gd content. It is found that there are two different types of grains in the magnets, which show different domain structures. The larger magnetocrystalline anisotropy, larger cell size, and coarser grain boundary region give rise to a higher coercivity in the Gd-rich magnets.

Original languageEnglish (US)
Pages (from-to)1053-1056
Number of pages4
JournalJournal of Applied Physics
Volume86
Issue number2
DOIs
StatePublished - Jul 15 1999

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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