Molecular field theory analysis of TbCo 3-xCu x compounds
Journal of Superconductivity and Novel Magnetism, cilt.24, sa.1-2, ss.819-824, 2011 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 24 Sayı: 1-2
- Basım Tarihi: 2011
- Doi Numarası: 10.1007/s10948-010-1025-0
- Dergi Adı: Journal of Superconductivity and Novel Magnetism
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.819-824
- Anahtar Kelimeler: Exchange interactions, Ferrimagnetism, Molecular field theory, Rare-earth intermetallic compounds
- Ankara Hacı Bayram Veli Üniversitesi Adresli: Hayır
Özet
The molecular field theory based on the twosublattice model was employed to analyze the temperature dependence of the magnetization and exchange interactions in TbCo 3-xCu x (0 ≤ x ≤ 0.5) compounds. The molecular field coefficients n CoCo, n TbCo and n TbTb were obtained by a numerical fitting process. The exchange coupling constants J CoCo, J TbCo and J TbTb have been calculated by using the molecular field coefficients. The Co-Co exchange energy decreases with increasing x. J CoCo dominates the three kinds of interactions, implying that the magnetic interactions are dominated by the exchange between 3d electrons. The copper substitution has little influence on the Tb-Co exchange interaction. © Springer Science+Business Media, LLC 2010.