Magnetocaloric effect in Tb5Si2-xGe2-xFe2x (0 ≤ 2x ≤ 0.1) compounds

Yuezueak E., Emre B., Yuecel A., Elerman Y.

Journal of Alloys and Compounds, vol.476, no.1-2, pp.929-934, 2009 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 476 Issue: 1-2
  • Publication Date: 2009
  • Doi Number: 10.1016/j.jallcom.2008.09.126
  • Journal Name: Journal of Alloys and Compounds
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.929-934
  • Keywords: Magnetic properties, Magnetocaloric effect, Rare-earth alloys, MAGNETIC-ENTROPY CHANGE, GD5SI2GE2, HYSTERESIS, MN
  • Ankara University Affiliated: Yes

Abstract

The influences of iron-alloying on the structure, magnetic and magnetocaloric properties of the Tb5Si2Ge2 compound have been studied using X-ray powder diffraction and magnetization measurements. X-ray diffraction studies show that both the alloyed and non-alloyed samples crystallize in the P1121/a monoclinic structure at room temperature. As the temperature is lowered, a first-order magnetic transition is observed in the parent compound, whereas only a second-order magnetic transition is recorded for the compounds alloyed with iron. Iron-alloying in small amounts of 2x ≈ 0.05 reduces the magnetic hysteresis significantly while retaining the magnitude of the change in magnetic entropy change. © 2008 Elsevier B.V. All rights reserved.