Magnetocaloric effect and nature of magnetic transition in nanoscale Pr0.5Ca0.5MnO3

Jammalamadaka, Narayana S and Rao, SS and Bhat, SV and Vanacken, J and Moshchalkov, VV (2012) Magnetocaloric effect and nature of magnetic transition in nanoscale Pr0.5Ca0.5MnO3. In: JOURNAL OF APPLIED PHYSICS, 112 (8).

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Abstract

Systematic measurements pertinent to the magnetocaloric effect and nature of magnetic transition around the transition temperature are performed in the 10 nm Pr0.5Ca0.5MnO3 nanoparticles (PCMO10). Maxwell's relation is employed to estimate the change in magnetic entropy. At Curie temperature (T-C) similar to 83.5 K, the change in magnetic entropy (-Delta S-M) discloses a typical variation with a value 0.57 J/kg K, and is found to be magnetic field dependent. From the area under the curve (Delta S vs T), the refrigeration capacity is calculated at T-C similar to 83.5K and it is found to be 7.01 J/kg. Arrott plots infer that due to the competition between the ferromagnetic and anti-ferromagnetic interactions, the magnetic phase transition in PCMO10 is broadly spread over both in temperature as well as magnetic field coordinates. Upon tuning the particle size, size distribution, morphology, and relative fraction of magnetic phases, it may be possible to enhance the magnetocalorific effect further in PCMO10. (C) 2012 American Institute of Physics. http://dx.doi.org/10.1063/1.4759372]

Item Type:	Journal Article
Publication:	JOURNAL OF APPLIED PHYSICS
Publisher:	AMER INST PHYSICS
Additional Information:	Copyright for this article belongs to AMER INST PHYSICS,USA
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	17 Dec 2012 05:37
Last Modified:	17 Dec 2012 05:37
URI:	http://eprints.iisc.ac.in/id/eprint/45554

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