Magnetic entropy-change in La0.67-xBixCa0.33MnO3 compound


ATALAY S. , KOLAT V. S. , Gencer H. , ADIGUZEL H. İ.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, cilt.305, ss.452-456, 2006 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 305 Konu: 2
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1016/j.jmmm.2006.02.082
  • Dergi Adı: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
  • Sayfa Sayıları: ss.452-456

Özet

Bi doped lanthanum manganites with the chemical composition of La0.67-xBixCa0.33MnO3 (x = 0, 0.05, 0.1, 0.2) were prepared by the standard solid-state process. The Curie temperatures were measured to be 267 K for x = 0, 248 K for x = 0.05, 244 K for x = 0.1 and 229 K for x = 0.2 samples. It was found that the maximum value of the magnetic entropy change \Delta S-m\ has reached the highest value of 6.08 J/kg K at 3 T for the composition with x = 0.05. Nearly the same maximum entropy change was observed for the x = 0 sample. A large decrease in the magnitude of the entropy change was observed for the x = 0.2 sample. (C) 2006 Elsevier B.V. All rights reserved.