Metamagnetic transition and magnetocaloric effect in charge-ordered Pr0.68Ca0.32-xSrxMnO3 (x=0, 0.1, 0.18, 0.26 and 0.32) compounds

KOLAT V. S., İZGİ T., KAYA A. T., BAYRİ N., GENÇER H., ATALAY S.

Journal of Magnetism and Magnetic Materials, vol.322, no.4, pp.427-433, 2010 (SCI-Expanded, Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 322 Issue: 4
  • Publication Date: 2010
  • Doi Number: 10.1016/j.jmmm.2009.09.071
  • Journal Name: Journal of Magnetism and Magnetic Materials
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.427-433
  • Keywords: Magnetic entropy change, Magnetocaloric effect, Manganites, Metamagnetic transition
  • Akdeniz University Affiliated: No

Abstract

In this study, magnetic and magnetocaloric properties of Pr0.68Ca0.32-xSrxMnO3 (x=0, 0.1, 0.18, 0.26 and 0.32) compounds were investigated. X-ray results indicated that all the samples have a single phase of orthorhombic symmetry. The orthorhombic unit cell parameters increase with the increase in Sr content. Large negative magnetic entropy changes (-26.2 J/kg K at 38 K and 5 T for x=0 and -6.5 J/kg K at 83 K and 6 T for x=0.1) were attributed to ultrasharp metamagnetic transitions. The peak value of ΔSm decreased from -4.1 J/kg K for x=0.18 sample to -2.4 J/kg K for x=0.32 at 1 T magnetic field. © 2009 Elsevier B.V. All rights reserved.