Calorimetric study of the inverse magnetocaloric effect in ferromagnetic Ni-Mn-Sn

Moya X., Manosa L., Planes A., Krenke T., Duman E., Acet M., ...Daha Fazla

Journal of Magnetism and Magnetic Materials, cilt.316, sa.2 SPEC. ISS., 2007 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 316 Sayı: 2 SPEC. ISS.
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1016/j.jmmm.2007.03.024
  • Dergi Adı: Journal of Magnetism and Magnetic Materials
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: Ni-Mn-Sn, Heusler alloy, martensitic transition, magnetocaloric effect
  • Ankara Üniversitesi Adresli: Hayır

Özet

We report calorimetric and magnetization results showing that an increase in entropy is induced in a Ni-Mn-Sn ferromagnetic alloy by the application of a magnetic field, thus giving rise to an inverse magnetocaloric effect (MCE). The entropy change found for Ni-Mn-Sn is comparable to that reported for giant magnetocaloric materials but with opposite sign. This inverse MCE has the origin in a crystallographic phase change that modifies the magnetic exchange interactions through the change in the lattice parameters. © 2007 Elsevier B.V. All rights reserved.