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Title: Enhancement of magnetocaloric properties in (1 − x)La{sub 0.7}Ca{sub 0.2}Sr{sub 0.1}MnO{sub 3}/xLa{sub 0.7}Ca{sub 0.15}Sr{sub 0.15}MnO{sub 3} composite system (0 ≤ x ≤ 1)

Abstract

Highlights: • The parent compounds were elaborated by solid-state reaction. • Continuous curves were investigated by the numerical calculations in (1 − x)La{sub 0.7}Ca{sub 0.2}Sr{sub 0.1}MnO{sub 3}/xLa{sub 0.7}Ca{sub 0.15}Sr{sub 0.15}MnO{sub 3} system. • The optimum magnetocaloric effect has been found for the composition with x = 0.45. - Abstract: The present work reveals an especial agreement between the experimental results and the continuous curves investigated by the numerical calculations in (1 − x)La{sub 0.7}Ca{sub 0.2}Sr{sub 0.1}MnO{sub 3}/xLa{sub 0.7}Ca{sub 0.15}Sr{sub 0.15}MnO{sub 3} composite system. Moreover, the ability to adjust the magnetic entropy change in a large temperature range is revealed to be possible by the mixture of both individual phases La{sub 0.7}Ca{sub 0.2}Sr{sub 0.1}MnO{sub 3} and La{sub 0.7}Ca{sub 0.15}Sr{sub 0.15}MnO{sub 3}. Our samples have been synthesised using the solid state method. Rietveld refinements of the X-ray diffraction patterns show that both samples are single phase. The Curie temperature T{sub C} is found to be 308 K and 338 K for La{sub 0.7}Ca{sub 0.2}Sr{sub 0.1}MnO{sub 3} and La{sub 0.7}Ca{sub 0.15}Sr{sub 0.15}MnO{sub 3}, respectively. Moreover, the magnetic entropy change and the Relative Cooling Power (RCP) values were estimated. We have shown that the optimum magnetocaloric effect at μ{sub 0}H = 2T has beenmore » found for the composition with x = 0.45, which exhibits a table-like ΔS curve with a peak value slightly lowered and strongly expanded when comparing with the parent compounds.« less

Authors:
; ; ;
Publication Date:
OSTI Identifier:
22730449
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 95; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CURIE POINT; MAGNETIC MATERIALS; MAGNETIC PROPERTIES; MAGNETIZATION; TEMPERATURE RANGE; X-RAY DIFFRACTION

Citation Formats

Ezaami, A., E-mail: ezaamiasma@yahoo.fr, Ouled Nasser, N., Cheikhrouhou-Koubaa, W., and Cheikhrouhou, A.. Enhancement of magnetocaloric properties in (1 − x)La{sub 0.7}Ca{sub 0.2}Sr{sub 0.1}MnO{sub 3}/xLa{sub 0.7}Ca{sub 0.15}Sr{sub 0.15}MnO{sub 3} composite system (0 ≤ x ≤ 1). United States: N. p., 2017. Web. doi:10.1016/J.MATERRESBULL.2017.07.036.
Ezaami, A., E-mail: ezaamiasma@yahoo.fr, Ouled Nasser, N., Cheikhrouhou-Koubaa, W., & Cheikhrouhou, A.. Enhancement of magnetocaloric properties in (1 − x)La{sub 0.7}Ca{sub 0.2}Sr{sub 0.1}MnO{sub 3}/xLa{sub 0.7}Ca{sub 0.15}Sr{sub 0.15}MnO{sub 3} composite system (0 ≤ x ≤ 1). United States. doi:10.1016/J.MATERRESBULL.2017.07.036.
Ezaami, A., E-mail: ezaamiasma@yahoo.fr, Ouled Nasser, N., Cheikhrouhou-Koubaa, W., and Cheikhrouhou, A.. Wed . "Enhancement of magnetocaloric properties in (1 − x)La{sub 0.7}Ca{sub 0.2}Sr{sub 0.1}MnO{sub 3}/xLa{sub 0.7}Ca{sub 0.15}Sr{sub 0.15}MnO{sub 3} composite system (0 ≤ x ≤ 1)". United States. doi:10.1016/J.MATERRESBULL.2017.07.036.
@article{osti_22730449,
title = {Enhancement of magnetocaloric properties in (1 − x)La{sub 0.7}Ca{sub 0.2}Sr{sub 0.1}MnO{sub 3}/xLa{sub 0.7}Ca{sub 0.15}Sr{sub 0.15}MnO{sub 3} composite system (0 ≤ x ≤ 1)},
author = {Ezaami, A., E-mail: ezaamiasma@yahoo.fr and Ouled Nasser, N. and Cheikhrouhou-Koubaa, W. and Cheikhrouhou, A.},
abstractNote = {Highlights: • The parent compounds were elaborated by solid-state reaction. • Continuous curves were investigated by the numerical calculations in (1 − x)La{sub 0.7}Ca{sub 0.2}Sr{sub 0.1}MnO{sub 3}/xLa{sub 0.7}Ca{sub 0.15}Sr{sub 0.15}MnO{sub 3} system. • The optimum magnetocaloric effect has been found for the composition with x = 0.45. - Abstract: The present work reveals an especial agreement between the experimental results and the continuous curves investigated by the numerical calculations in (1 − x)La{sub 0.7}Ca{sub 0.2}Sr{sub 0.1}MnO{sub 3}/xLa{sub 0.7}Ca{sub 0.15}Sr{sub 0.15}MnO{sub 3} composite system. Moreover, the ability to adjust the magnetic entropy change in a large temperature range is revealed to be possible by the mixture of both individual phases La{sub 0.7}Ca{sub 0.2}Sr{sub 0.1}MnO{sub 3} and La{sub 0.7}Ca{sub 0.15}Sr{sub 0.15}MnO{sub 3}. Our samples have been synthesised using the solid state method. Rietveld refinements of the X-ray diffraction patterns show that both samples are single phase. The Curie temperature T{sub C} is found to be 308 K and 338 K for La{sub 0.7}Ca{sub 0.2}Sr{sub 0.1}MnO{sub 3} and La{sub 0.7}Ca{sub 0.15}Sr{sub 0.15}MnO{sub 3}, respectively. Moreover, the magnetic entropy change and the Relative Cooling Power (RCP) values were estimated. We have shown that the optimum magnetocaloric effect at μ{sub 0}H = 2T has been found for the composition with x = 0.45, which exhibits a table-like ΔS curve with a peak value slightly lowered and strongly expanded when comparing with the parent compounds.},
doi = {10.1016/J.MATERRESBULL.2017.07.036},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = ,
volume = 95,
place = {United States},
year = {2017},
month = {11}
}