Theoretical work on magnetocaloric effect in La0.75Ca0.25MnO3Report as inadecuate




Theoretical work on magnetocaloric effect in La0.75Ca0.25MnO3 - Download this document for free, or read online. Document in PDF available to download.

Journal of Advanced Ceramics

, Volume 1, Issue 4, pp 290–295

First Online: 09 January 2013Received: 26 September 2012Revised: 10 November 2012Accepted: 12 November 2012

Abstract

In this work, a phenomenological model is applied to describe the magnetocaloric effect for the La0.75Ca0.25MnO3 system near a second-order phase transition from a ferromagnetic to a paramagnetic state. Based on this model, it can predict the values of the magnetocaloric properties from calculation of magnetization as a function of temperature under different external magnetic fields. The magnetic entropy change reaches a peak of about 5.39 J-kg·K at 257 K upon 4 T applied field variation. The ΔSM distribution is much more uniform than that of gadolinium, which is desirable for an Ericson-cycle magnetic refrigerator.

Key wordsmagnetocaloric effect model magnetic entropy change heat capacity change relative cooling power This article is published with open access at Springerlink.com

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Author: Mahmoud Aly Hamad

Source: https://link.springer.com/







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