| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1621938 | Journal of Alloys and Compounds | 2009 | 4 Pages |
Abstract
Structural transformation, microstructure and magnetocaloric effect (MCE) were investigated in melt-spun Ni55Mn20.6Ga24.4 and Ni55Mn19.6Ga25.4 ribbons. Magnetic and thermal studies of the ribbons revealed the occurrence of simultaneous structural and magnetic transitions near room temperature with a narrow thermal hysteresis of magnetization ≈2 K. Maximum entropy changes (ΔSM) of −9.5 and −10.4 J/kg K have been obtained at 309 K for a field change of 2 T in Ni55Mn20.6Ga24.4 and Ni55Mn19.6Ga25.4 ribbons, respectively. The Ni55Mn19.6Ga25.4 ribbon exhibits refrigeration capacity (RC) of 47 J/kg with low average hysteresis loss (≈1.5 J/kg) at the merged structural and magnetic transition temperature.
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Metals and Alloys
Authors
N.V. Rama Rao, R. Gopalan, V. Chandrasekaran, K.G. Suresh,