Effects of the sintering temperature on the La0.63Gd0.37MnO3 structure and magnetic properties

Anas Rasras; Riheb Hamdi; Said Mansour; Ayman Samara; Yousef Haik

doi:10.1007/s00339-020-04032-0

Effects of the sintering temperature on the La_0.63Gd_0.37MnO₃ structure and magnetic properties

Anas Rasras, Riheb Hamdi, Said Mansour, Ayman Samara, Yousef Haik^*

^*Corresponding author for this work

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Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

La_0.63Gd_0.37MnO₃ material was synthesized using the Pechini-modified-sol–gel method at different sintering temperatures 600, 650, 750, 800, and 900 °C. After characterizing the samples structurally and magnetically, we report a direct relation between the crystallite size, particles agglomeration level, and material performance in field-cooling/zero-field-cooling magnetization modes, in addition to an inverse relation between the existence of Griffith phase and the samples’ magneto-caloric performance. The material sintered at 800 °C presents the maximum isothermal entropy change among others that is 7.57 J kg⁻¹ K⁻¹ at 7 T, in addition to a good performance shown at higher temperatures, making it a promising candidate for different cooling applications.

Original language	English
Article number	838
Journal	Applied Physics A: Materials Science and Processing
Volume	126
Issue number	11
DOIs	https://doi.org/10.1007/s00339-020-04032-0
Publication status	Published - 1 Nov 2020

Keywords

Cryogenic cooling
LaGdMnO
Magnetocaloric refrigeration
Perovskite manganites

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10.1007/s00339-020-04032-0

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abstract = "La0.63Gd0.37MnO3 material was synthesized using the Pechini-modified-sol–gel method at different sintering temperatures 600, 650, 750, 800, and 900 °C. After characterizing the samples structurally and magnetically, we report a direct relation between the crystallite size, particles agglomeration level, and material performance in field-cooling/zero-field-cooling magnetization modes, in addition to an inverse relation between the existence of Griffith phase and the samples{\textquoteright} magneto-caloric performance. The material sintered at 800 °C presents the maximum isothermal entropy change among others that is 7.57 J kg−1 K−1 at 7 T, in addition to a good performance shown at higher temperatures, making it a promising candidate for different cooling applications.",

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AU - Rasras, Anas

AU - Hamdi, Riheb

AU - Mansour, Said

AU - Samara, Ayman

AU - Haik, Yousef

PY - 2020/11/1

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N2 - La0.63Gd0.37MnO3 material was synthesized using the Pechini-modified-sol–gel method at different sintering temperatures 600, 650, 750, 800, and 900 °C. After characterizing the samples structurally and magnetically, we report a direct relation between the crystallite size, particles agglomeration level, and material performance in field-cooling/zero-field-cooling magnetization modes, in addition to an inverse relation between the existence of Griffith phase and the samples’ magneto-caloric performance. The material sintered at 800 °C presents the maximum isothermal entropy change among others that is 7.57 J kg−1 K−1 at 7 T, in addition to a good performance shown at higher temperatures, making it a promising candidate for different cooling applications.

AB - La0.63Gd0.37MnO3 material was synthesized using the Pechini-modified-sol–gel method at different sintering temperatures 600, 650, 750, 800, and 900 °C. After characterizing the samples structurally and magnetically, we report a direct relation between the crystallite size, particles agglomeration level, and material performance in field-cooling/zero-field-cooling magnetization modes, in addition to an inverse relation between the existence of Griffith phase and the samples’ magneto-caloric performance. The material sintered at 800 °C presents the maximum isothermal entropy change among others that is 7.57 J kg−1 K−1 at 7 T, in addition to a good performance shown at higher temperatures, making it a promising candidate for different cooling applications.

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Effects of the sintering temperature on the La_0.63Gd_0.37MnO₃ structure and magnetic properties

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Keywords

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