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The European Physical Journal B

, Volume 64, Issue 1, pp 19–25 | Cite as

Thermomagnetic history effects across the first order magneto-structural transition in the giant magnetocaloric Fe-Rh alloy

  • M. ManekarEmail author
  • S. B. Roy
Article

Abstract

Results of ac susceptibility and isofield and isothermal magnetization measurements on a poly-crystalline Fe-Rh alloy are presented across the first order magneto-structural transition. Interesting thermomagnetic history effects are observed, including the one in which the virgin magnetization curve lies outside the envelope curve in an isothermal field variation of magnetization. These thermomagnetic history effects are interpreted in terms of a disorder influenced first order phase transition and associated features like phase coexistence and metastability, without invoking the idea of a kinetic arrest of the transition. The importance of understanding these history effects is highlighted in the context of repeatable functional properties of Fe-Rh alloy.

PACS

75.30.Kz Magnetic phase boundaries 

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  1. 1.Magnetic and Superconducting Materials SectionRaja Ramanna Centre for Advanced TechnologyIndoreIndia

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