Please use this identifier to cite or link to this item:
|Title:||Investigation of magnetocaloric effect in La 0.45Pr 0.25Ca 0.3MnO 3 by magnetic, differential scanning calorimetry and thermal analysis|
|Source:||Aparnadevi, M., Barik, S.K., Mahendiran, R. (2012-10). Investigation of magnetocaloric effect in La 0.45Pr 0.25Ca 0.3MnO 3 by magnetic, differential scanning calorimetry and thermal analysis. Journal of Magnetism and Magnetic Materials 324 (20) : 3351-3355. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jmmm.2012.05.053|
|Abstract:||We investigated magnetocaloric effect in La 0.45Pr 0.25Ca 0.3MnO 3 by direct methods (changes in temperature and latent heat) and indirect method (magnetization isotherms). This compound undergoes a first-order paramagnetic to ferromagnetic transition with T C=200 K upon cooling. The paramagnetic phase becomes unstable and it transforms into a ferromagnetic phase under the application of magnetic field, which results in a field-induced metamagnetic transition (FIMMT). The FIMMT is accompanied by release of latent heat and temperature of the sample as evidenced from differential scanning calorimetry and thermal analysis experiments. A large magnetic entropy change of ΔS m=-7.2 J kg -1 K -1 at T=212.5 K and refrigeration capacity of 228 J kg -1 are found for a field change of ΔH=5 T. It is suggested that destruction of magnetic polarons and growth of ferromagnetic phase accompanied by a lattice volume change with increasing magnetic field is responsible for the large magnetocaloric effect in this compound. © 2012 Elsevier B.V. All rights reserved.|
|Source Title:||Journal of Magnetism and Magnetic Materials|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 20, 2018
WEB OF SCIENCETM
checked on Dec 13, 2017
checked on Feb 23, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.