Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/115450
Title: Magnetic and calorimetric studies of magnetocaloric effect in La 0.7-xPr xCa 0.3MnO 3
Authors: Barik, S.K. 
Aparnadevi, M.
Rebello, A.
Naik, V.B.
Mahendiran, R. 
Issue Date: 1-Apr-2012
Citation: Barik, S.K., Aparnadevi, M., Rebello, A., Naik, V.B., Mahendiran, R. (2012-04-01). Magnetic and calorimetric studies of magnetocaloric effect in La 0.7-xPr xCa 0.3MnO 3. Journal of Applied Physics 111 (7) : -. ScholarBank@NUS Repository.
Abstract: We report magnetocaloric effect in La 0.7-xPr xCa 0.3MnO 3 (x = 0, 0.2, 0.3, and 0.4). All these compounds undergo first-order paramagnetic to ferromagnetic transition upon cooling and show field-induced metamagnetic transition (FIMMT) in the paramagnetic state. The FIMMT is accompanied by a release of latent heat and change in temperature of the sample as evidenced from differential scanning calorimetry and thermal analysis data for x = 0.3. The magnetic entropy decreases (-δS m 8.23, 8.1, 7, and 5.38 Jkg -1 K -1 for a field change of δH 5 T, for x = 0, 0.2, 0.3, and 0.4, respectively) and refrigeration capacity (RC) increases with increasing x (RC 197, 215, 240, and 259 J/kg for x = 0, 0.2, 0.3, and 0.4, respectively). We suggest that collapse of magnetic polarons in the paramagnetic state and magnetovolume effect are responsible for the observed FIMMT and large -δS m values. © 2012 American Institute of Physics.
Source Title: Journal of Applied Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/115450
ISSN: 00218979
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

2
checked on Mar 6, 2018

WEB OF SCIENCETM
Citations

14
checked on Oct 8, 2021

Page view(s)

50
checked on Oct 14, 2021

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.