Inverse and conventional magnetic entropy change in La0.8Sm 0.2Mn2Si2 and La0.775Gd 0.225Mn2Si2 compounds

Emre B., Dincer I., Elerman Y., Duman E.

Physica Scripta, cilt.80, sa.5, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 80 Sayı: 5
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1088/0031-8949/80/05/055703
  • Dergi Adı: Physica Scripta
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Ankara Üniversitesi Adresli: Evet

Özet

The magnetic and magnetocaloric properties of La0.8Sm 0.2Mn2Si2 and La0.775Gd 0.225Mn2Si2 compounds have been studied by temperature- and magnetic field-dependent magnetic measurements. Both compounds crystallize in the ThCr2Si2-type structure with the space group I4/mmm. Both compounds exhibit reentrant magnetic phase transitions and field-induced transitions from antiferromagnetic to ferromagnetic or ferrimagnetic state. The isothermal magnetic entropy change is estimated by using the Maxwell relation and Landau theory. Both compounds show inverse and conventional magnetocaloric effects around transition temperatures. Application of Landau theory on magnetic transitions shows good agreement with the result obtained by Maxwell theory. © 2009 The Royal Swedish Academy of Sciences.