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Journal of Advanced Ceramics 2012, 1(4): 290-295 https://doi.org/10.1007/s40145-012-0027-8
Research Article | Open Access | Issue | Published: 09 January 2013

Theoretical work on magnetocaloric effect in La0.75Ca0.25MnO3

Show Author's Information Mahmoud Aly HAMAD*( )
Physics Department, College of Science, Al-Jouf University, Al-Jouf, Skaka, P.O. Box 2014, Saudi Arabia
Keywords:
magnetocaloric effect, model, magnetic entropy change, heat capacity change, relative cooling power
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HAMAD MA. Theoretical work on magnetocaloric effect in La0.75Ca0.25MnO3. Journal of Advanced Ceramics, 2012, 1(4): 290-295. https://doi.org/10.1007/s40145-012-0027-8
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Abstract Full text About this article

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 ∆SM distribution is much more uniform than that of gadolinium, which is desirable for an Ericson-cycle magnetic refrigerator.


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About this article

Theoretical work on magnetocaloric effect in La0.75Ca0.25MnO3

Show Author's information Mahmoud Aly HAMAD*( )
Physics Department, College of Science, Al-Jouf University, Al-Jouf, Skaka, P.O. Box 2014, Saudi Arabia

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 ∆SM distribution is much more uniform than that of gadolinium, which is desirable for an Ericson-cycle magnetic refrigerator.

Keywords: magnetocaloric effect, model, magnetic entropy change, heat capacity change, relative cooling power

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Publication history

Received: 26 September 2012
Revised: 10 November 2012
Accepted: 12 November 2012
Published: 09 January 2013
Issue date: December 2012

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© The author(s) 2012

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