Antiferromagnetic-ferromagnetic crossover in La0.5Pr 0.5Mn2Si2 and its consequences on magnetoelastic and magnetocaloric properties
Physical Review B - Condensed Matter and Materials Physics, cilt.78, sa.14, 2008 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 78 Sayı: 14
- Basım Tarihi: 2008
- Doi Numarası: 10.1103/physrevb.78.144408
- Dergi Adı: Physical Review B - Condensed Matter and Materials Physics
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Ankara Üniversitesi Adresli: Evet
Özet
La0.5Pr0.5Mn2Si2 exhibits an antiferromagnetic-ferromagnetic transition caused by the crossover of the critical distance between Mn atoms on changing temperature. Applying a magnetic field in the antiferromagnetic state can cause a field-induced transformation to the ferromagnetic state at a critical field, which increases with decreasing temperature. We study here with magnetization and strain measurements the magnetic-field-induced strain associated with the field-induced transformation and magnetocaloric effects close to the transition temperature. We also examine the temperature dependence of the critical field and find from magnetization and ferromagnetic resonance measurements that short-range ferromagnetic correlation among the rare earth and Mn-sublattices occur at low temperatures. At low temperatures, this causes a decrease in the critical field for the crossover from antiferromagnetic to ferromagnetic coupling with decreasing temperature. © 2008 The American Physical Society.