The range of exchange interactions and curie temperature in La0.67-xBixCa0.33MnO3 compounds

Gencer H., ATALAY S.

INTERNATIONAL JOURNAL OF MODERN PHYSICS B, cilt.19, sa.27, ss.4115-4123, 2005 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 19 Sayı: 27
  • Basım Tarihi: 2005
  • Doi Numarası: 10.1142/s0217979205032619
  • Dergi Adı: INTERNATIONAL JOURNAL OF MODERN PHYSICS B
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.4115-4123
  • Anahtar Kelimeler: manganites, exchange interaction, spin wave, Curie temperature, mean-field theory, Bi doping, TRANSPORT-PROPERTIES, MANGANITES
  • İnönü Üniversitesi Adresli: Evet

Özet

Magnetic properties of Bi-3+-doped La0.67-xBiXCa0.33MnO3 (x = 0, 0.05, 0.1, 0.2) are investigated. Using the mean-field and ferromagnetic spin-wave theory at low temperatures, total exchange integrals and Curie temperatures are calculated in the range 0 <= x <= 0.2. Calculated values of T,, are in good agreement with those obtained by magnetic measurements. In addition, the total exchange integral decrease with Bi3+ shows the existence of canted ferromagnetic order in the samples, as observed in experimental results.