Please use this identifier to cite or link to this item:
|Title:||Effect of Fe substitution on magnetocaloric effect in La 0.7Sr0.3Mn1-xFexO3 (0.05≤x≤0.20)||Authors:||Barik, S.K.
|Issue Date:||Apr-2011||Citation:||Barik, S.K., Krishnamoorthi, C., Mahendiran, R. (2011-04). Effect of Fe substitution on magnetocaloric effect in La 0.7Sr0.3Mn1-xFexO3 (0.05≤x≤0.20). Journal of Magnetism and Magnetic Materials 323 (7) : 1015-1021. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jmmm.2010.12.007||Abstract:||We have studied the effect of Fe substitution on magnetic and magnetocaloric properties in La0.7Sr0.3Mn 1-xFexO3 (x=0.05, 0.07, 0.10, 0.15, and 0.20) over a wide temperature range (T=10400 K). It is shown that substitution by Fe gradually decreases the ferromagnetic Curie temperature (TC) and saturation magnetization up to x=0.15 but a dramatic change occurs for x=0.2. The x=0.2 sample can be considered as a phase separated compound in which both short-range ordered ferromagnetic and antiferromagnetic phases coexist. The magnetic entropy change (-ΔSm) was estimated from isothermal magnetization curves and it decreases with increase of Fe content from 4.4 J kg-1 K-1 at 343 K (x=0.05) to 1.3 J kg-1 K -1 at 105 K (x=0.2), under ΔH=5 T. The La0.7Sr 0.3Mn0.93Fe0.07O3 sample shows negligible hysteresis loss, operating temperature range over 60 K around room temperature with refrigerant capacity of 225 J kg-1, and magnetic entropy of 4 J kg-1 K-1 which will be an interesting compound for application in room temperature refrigeration. © 2010 Elsevier B.V. All rights reserved.||Source Title:||Journal of Magnetism and Magnetic Materials||URI:||http://scholarbank.nus.edu.sg/handle/10635/96304||ISSN:||03048853||DOI:||10.1016/j.jmmm.2010.12.007|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on May 29, 2020
WEB OF SCIENCETM
checked on May 21, 2020
checked on May 30, 2020
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.