Effect of high pressure on the magnetocaloric property of LaFe 11.5Si1.5

L. Jia, J. R. Sun, B. G. Shen, D. X. Li, S. Nimori

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10 Citations (Scopus)

Abstract

A field-induced magnetic entropy change under high pressure has been experimentally studied for the LaFe11.5 Si1.5 compound. High pressure causes a linear decrease of the Curie temperature from ~194 to ~88 K, corresponding to a variation of the pressure from ~0 to 1 GPa. Appropriate pressures enhance the magnetic entropy change significantly in the meantime depressing the Curie temperature. A spike-shaped peak, followed by a plateau with a width of ~20 K, of the entropy change emerges and grows rapidly with the increase of pressure, and its maximum value is 138 Jkg K, obtained under the pressure of 1 GPa for a field change of 0-5 T. The pressure effect is also obvious on the entropy plateau. It results in an increase of the plateau height from ~23.8 Jkg K, without pressure, to ~29 Jkg K, when the pressure is 0.45 GPa. These results demonstrate the effectiveness of high pressure in modifying the entropy of LaFe11.5 Si1.5.

Original languageEnglish
Article number106108
JournalJournal of Applied Physics
Volume101
Issue number10
DOIs
Publication statusPublished - 2007

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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