Large spontaneous magnetostrictive softening below the Curie temperature of Fe3C Invar particles

Duman E., Acet M., Hulser T., Wassermann E., Rellinghaus B., Itie J., ...Daha Fazla

JOURNAL OF APPLIED PHYSICS, cilt.96, sa.10, ss.5668-5672, 2004 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 96 Sayı: 10
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1063/1.1803634
  • Dergi Adı: JOURNAL OF APPLIED PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.5668-5672
  • Ankara Üniversitesi Adresli: Hayır

Özet

Fe3C incorporates only Fe as a metallic element and is an Invar material with valence electron concentration 8.67. We have studied the equation of state up to 20 GPa of Fe3C particles (dsimilar to40 nm) below and above the Curie temperature (room temperature and 550 K, respectively) to search for a softening associated with a magnetovolume instabilities characteristic of Invar-type material. The isothermal bulk modulus of Fe3C particles at room temperature was found to be about 13% smaller than that of the value at 550 K. This difference is comparable with the relative difference in the bulk modulus of Fe65Ni35 Invar in a similar temperature range around the Curie temperature. (C) 2004 American Institute of Physics.