J Mater Sci Technol ›› 2000, Vol. 16 ›› Issue (02): 167-171.

• Research Articles • Previous Articles     Next Articles

Giant volume magnetostriction caused by itinerant electron metamagnetic transition and pronounced invar effects in La(FexSi1-x)(13) compounds

K.Fukamichi, A.Fujita   

  1. Department of Materials Science, Graduate School of Engineering, Tohoku University, Aoba-yama 02, Sendai 980-8579, Japan
  • Received:1999-07-02 Revised:1999-08-25 Online:2000-03-28 Published:2009-10-10
  • Contact: K.Fukamichi

Abstract: A first-order itinerant electron metamagnetic (IEM) transition above the Curie temperature T-C for ferromagnetic La(FexSi1-x)(13) compounds has been confirmed by applying magnetic field. The Volume change just above T-C for x=0.88 is huge of about 1.5%, which is caused by a large magnetic moment induced by the IEM transition. These compounds have a possibility for practical applications as giant magnetostrictive materials. Pronounced Invar effects bring about a negative thermal expansion below T-C, closely correlated with the negative mode-mode coupling among spin fluctuations.

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