Direct and indirect measurement of the magnetocaloric effect in a La0.6Ca0.4MnO3 ceramic perovskite

A.R. Dinesen; Søren Linderoth; Steen Mørup

doi:10.1016/S0304-8853(01)00941-6

Direct and indirect measurement of the magnetocaloric effect in a La₀_.₆Ca₀_.₄Mn_O₃ ceramic perovskite

A.R. Dinesen, Søren Linderoth, Steen Mørup

Department of Physics

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

The adiabatic temperature change DeltaT(ad) due to a change of the external magnetic field (the magnetocaloric effect) for a perovskite-type La0.6Ca0.4MnO3 sample has been measured directly and indirectly (from the entropy change) and the results are compared. From the indirect method, involving magnetic and calorimetric measurements, a maximum temperature change of approximately 0.54K can be expected with a field change of 0.7T. Considering experimental errors, this is in fairly good agreement with the direct temperature measurement, where a maximum temperature change of about 0.5 K was observed with a corresponding change of the applied field. The experimental results are in accordance with theoretical estimates obtained from a mean field theory.

Original language	English
Article number	PII S0304-8853(01)00941-6
Journal	Journal of Magnetism and Magnetic Materials
Volume	253
Issue number	1-2
Pages (from-to)	28-34
ISSN	0304-8853
DOIs	https://doi.org/10.1016/S0304-8853(01)00941-6
Publication status	Published - 2002

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title = "Direct and indirect measurement of the magnetocaloric effect in a La0.6Ca0.4MnO3 ceramic perovskite",

abstract = "The adiabatic temperature change DeltaT(ad) due to a change of the external magnetic field (the magnetocaloric effect) for a perovskite-type La0.6Ca0.4MnO3 sample has been measured directly and indirectly (from the entropy change) and the results are compared. From the indirect method, involving magnetic and calorimetric measurements, a maximum temperature change of approximately 0.54K can be expected with a field change of 0.7T. Considering experimental errors, this is in fairly good agreement with the direct temperature measurement, where a maximum temperature change of about 0.5 K was observed with a corresponding change of the applied field. The experimental results are in accordance with theoretical estimates obtained from a mean field theory.",

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T1 - Direct and indirect measurement of the magnetocaloric effect in a La0.6Ca0.4MnO3 ceramic perovskite

AU - Dinesen, A.R.

AU - Linderoth, Søren

AU - Mørup, Steen

PY - 2002

Y1 - 2002

N2 - The adiabatic temperature change DeltaT(ad) due to a change of the external magnetic field (the magnetocaloric effect) for a perovskite-type La0.6Ca0.4MnO3 sample has been measured directly and indirectly (from the entropy change) and the results are compared. From the indirect method, involving magnetic and calorimetric measurements, a maximum temperature change of approximately 0.54K can be expected with a field change of 0.7T. Considering experimental errors, this is in fairly good agreement with the direct temperature measurement, where a maximum temperature change of about 0.5 K was observed with a corresponding change of the applied field. The experimental results are in accordance with theoretical estimates obtained from a mean field theory.

AB - The adiabatic temperature change DeltaT(ad) due to a change of the external magnetic field (the magnetocaloric effect) for a perovskite-type La0.6Ca0.4MnO3 sample has been measured directly and indirectly (from the entropy change) and the results are compared. From the indirect method, involving magnetic and calorimetric measurements, a maximum temperature change of approximately 0.54K can be expected with a field change of 0.7T. Considering experimental errors, this is in fairly good agreement with the direct temperature measurement, where a maximum temperature change of about 0.5 K was observed with a corresponding change of the applied field. The experimental results are in accordance with theoretical estimates obtained from a mean field theory.

U2 - 10.1016/S0304-8853(01)00941-6

DO - 10.1016/S0304-8853(01)00941-6

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EP - 34

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 1-2

M1 - PII S0304-8853(01)00941-6