Magnetocaloric properties of the Gd5Si2.05-xGe1.95-xMn2x compounds

Yüzüak E., DİNÇER İ., Elerman Y.

Journal of Rare Earths, cilt.28, sa.3, ss.477-480, 2010 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 28 Sayı: 3
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1016/s1002-0721(09)60114-9
  • Dergi Adı: Journal of Rare Earths
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.477-480
  • Anahtar Kelimeler: heat treatments, intermetallics, magnetic materials, rare earths
  • Ankara Üniversitesi Adresli: Evet

Özet

The influence of the manganese-alloying on the structure and magnetocaloric properties of the Gd5Si2.05Ge1.95 compound was studied by X-ray powder diffraction and magnetization measurements. The Gd5Si2.05-xGe1.95-xMn2x (2x=0, 0.03 and 0.08) compounds crystallized in the Gd5Si2Ge2-type monoclinic structure. In all X-ray powder diffraction patterns, a minor hexagonal Gd5Si3 phase was observed as a second phase. With increasing Mn content, the unit cell volume increased. For the compounds with x=0, 0.03 and 0.08, the first order phase transition was observed. The maximum isothermal magnetic entropy change of the Gd5Si2.05-xGe1.95-xMn2x compound with 2x=0.03 at 275 K was found to be -11.6 J/(kg·K) in an applied field of 5 T. © 2010 The Chinese Society of Rare Earths.