Dependence of the magnetocaloric effect on oxygen stoichiometry in polycrystalline La2/3Ba1/3MnO3-δ

W. Zhong; W. Chen; Chak Tong AU; Y. W. Du

doi:10.1016/S0304-8853(02)01479-8

Dependence of the magnetocaloric effect on oxygen stoichiometry in polycrystalline La_2/3Ba_1/3MnO_3-δ

W. Zhong^*, W. Chen, Chak Tong AU, Y. W. Du

^*Corresponding author for this work

Department of Chemistry

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

102 Citations (Scopus)

Abstract

Polycrystalline perovskites La_2/3Ba_1/3MnO _3-δ with different oxygen deficiency δ(0≤δ≤0.10) have been prepared by a modified sol-gel method and their Curie temperatures and magnetocaloric effect have been studied. A close relationship is confirmed to hold between the Curie temperature and the oxygen stoichiometry. The maximum magnetic entropy change is in the order of 2. 7 J/kgK and peaks at Curie temperature for La_2/3Ba _1/3MnO₃ upon 10 kOe applied field change. For the samples with oxygen deficiency, a reduction of the maximum magnetic entropy change has been observed.

Original language	English
Pages (from-to)	238-243
Number of pages	6
Journal	Journal of Magnetism and Magnetic Materials
Volume	261
Issue number	1-2
DOIs	https://doi.org/10.1016/S0304-8853(02)01479-8
Publication status	Published - Apr 2003

User-Defined Keywords

Magnetocaloric effect
Oxygen stoichiometry
Perovskite manganites
Sol-gel synthesis

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10.1016/S0304-8853(02)01479-8

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title = "Dependence of the magnetocaloric effect on oxygen stoichiometry in polycrystalline La2/3Ba1/3MnO3-δ",

abstract = "Polycrystalline perovskites La2/3Ba1/3MnO 3-δ with different oxygen deficiency δ(0≤δ≤0.10) have been prepared by a modified sol-gel method and their Curie temperatures and magnetocaloric effect have been studied. A close relationship is confirmed to hold between the Curie temperature and the oxygen stoichiometry. The maximum magnetic entropy change is in the order of 2. 7 J/kgK and peaks at Curie temperature for La2/3Ba 1/3MnO3 upon 10 kOe applied field change. For the samples with oxygen deficiency, a reduction of the maximum magnetic entropy change has been observed.",

keywords = "Magnetocaloric effect, Oxygen stoichiometry, Perovskite manganites, Sol-gel synthesis",

author = "W. Zhong and W. Chen and AU, {Chak Tong} and Du, {Y. W.}",

note = "Funding Information: This work is supported by the National Natural Science Foundation of China under Grant No. 50072007, and the National Key Project for Basic Research (No. G1999064508), People's Republic of China.",

year = "2003",

month = apr,

doi = "10.1016/S0304-8853(02)01479-8",

language = "English",

volume = "261",

pages = "238--243",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

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TY - JOUR

T1 - Dependence of the magnetocaloric effect on oxygen stoichiometry in polycrystalline La2/3Ba1/3MnO3-δ

AU - Zhong, W.

AU - Chen, W.

AU - AU, Chak Tong

AU - Du, Y. W.

N1 - Funding Information: This work is supported by the National Natural Science Foundation of China under Grant No. 50072007, and the National Key Project for Basic Research (No. G1999064508), People's Republic of China.

PY - 2003/4

Y1 - 2003/4

N2 - Polycrystalline perovskites La2/3Ba1/3MnO 3-δ with different oxygen deficiency δ(0≤δ≤0.10) have been prepared by a modified sol-gel method and their Curie temperatures and magnetocaloric effect have been studied. A close relationship is confirmed to hold between the Curie temperature and the oxygen stoichiometry. The maximum magnetic entropy change is in the order of 2. 7 J/kgK and peaks at Curie temperature for La2/3Ba 1/3MnO3 upon 10 kOe applied field change. For the samples with oxygen deficiency, a reduction of the maximum magnetic entropy change has been observed.

AB - Polycrystalline perovskites La2/3Ba1/3MnO 3-δ with different oxygen deficiency δ(0≤δ≤0.10) have been prepared by a modified sol-gel method and their Curie temperatures and magnetocaloric effect have been studied. A close relationship is confirmed to hold between the Curie temperature and the oxygen stoichiometry. The maximum magnetic entropy change is in the order of 2. 7 J/kgK and peaks at Curie temperature for La2/3Ba 1/3MnO3 upon 10 kOe applied field change. For the samples with oxygen deficiency, a reduction of the maximum magnetic entropy change has been observed.

KW - Magnetocaloric effect

KW - Oxygen stoichiometry

KW - Perovskite manganites

KW - Sol-gel synthesis

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U2 - 10.1016/S0304-8853(02)01479-8

DO - 10.1016/S0304-8853(02)01479-8

M3 - Journal article

AN - SCOPUS:0141607622

SN - 0304-8853

VL - 261

SP - 238

EP - 243

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 1-2

ER -

Dependence of the magnetocaloric effect on oxygen stoichiometry in polycrystalline La_2/3Ba_1/3MnO_3-δ

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