Magnetic instabilities in Fe3C cementite particles observed with FeK-edge X-ray circular dichroism under pressure

Duman E., Acet M., Wassermann E., Itie J., Baudelet F., Mathon O., ...Daha Fazla

PHYSICAL REVIEW LETTERS, cilt.94, sa.7, 2005 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 94 Sayı: 7
  • Basım Tarihi: 2005
  • Doi Numarası: 10.1103/physrevlett.94.075502
  • Dergi Adı: PHYSICAL REVIEW LETTERS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Ankara Üniversitesi Adresli: Hayır

Özet

The ferromagnetic interstitial iron compound Fe3C (cementite) is expected to have Invar properties, whereby a high-moment to low-moment transition should occur when the atomic volume is reduced below a critical value. We, therefore, examine the pressure dependence of the Fe K-edge x-ray magnetic circular dichroism in Fe3C at ambient temperature and pressures up to 20 GPa. We find clear evidence for a high-moment to low-moment transition around 10 GPa.