Sm-Co-Cu-Ti high-temperature permanent magnets

J. Zhou, R. Skomski, C. Chen, G. C. Hadjipanayis, D. J. Sellmyer

Research output: Contribution to journalArticlepeer-review

147 Scopus citations


A class of promising permanent-magnet materials with an appreciable high-temperature coercivity of 8.6 kOe at 500°C is reported. The Sm-Co-Cu-Ti magnets are prepared by arc melting and require a suitable heat treatment. Magnetization measurements as a function of temperature and x-ray diffraction patterns indicate that the samples are two-phase mixtures of 2:17 and 1:5 structures. Depending on heat treatment and composition, some of the magnets exhibit a positive temperature coefficient of coercivity. The promising high-temperature behavior of the coercivity is ascribed to the temperature dependence of the domain-wail energy, which affects the curvature of the walls and the pinning behavior.

Original languageEnglish (US)
Pages (from-to)1514-1516
Number of pages3
JournalApplied Physics Letters
Issue number10
StatePublished - Sep 4 2000

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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