Negative Magnetism in Perovskite Manganites Gd1-xSrxMnO3(0.1 ≤x ≤0.3)

doi:10.1007/s40242-015-5196-x

高等学校化学研究 ›› 2015, Vol. 31 ›› Issue (5): 699-703.doi: 10.1007/s40242-015-5196-x

Negative Magnetism in Perovskite Manganites Gd_1-xSr_xMnO₃(0.1 ≤x ≤0.3)

ZHANG Yingnan, LI Junjia, ZHANG Ziqing, LIU Fuyang, ZHAO Xudong, LIU Xiaoyang

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China

收稿日期:2015-05-14 修回日期:2015-07-18 出版日期:2015-10-01 发布日期:2015-07-27
通讯作者: ZHAO Xudong, E-mail: xdzhao@jlu.edu.cn; LIU Xiaoyang, E-mail: liuxy@jlu.edu.cn E-mail:xdzhao@jlu.edu.cn;liuxy@jlu.edu.cn
基金资助:
Supported by the National Natural Sciences Foundation of China(Nos.21271082, 21371068).

Negative Magnetism in Perovskite Manganites Gd_1-xSr_xMnO₃(0.1 ≤x ≤0.3)

ZHANG Yingnan, LI Junjia, ZHANG Ziqing, LIU Fuyang, ZHAO Xudong, LIU Xiaoyang

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China

Received:2015-05-14 Revised:2015-07-18 Online:2015-10-01 Published:2015-07-27
Contact: ZHAO Xudong, E-mail: xdzhao@jlu.edu.cn; LIU Xiaoyang, E-mail: liuxy@jlu.edu.cn E-mail:xdzhao@jlu.edu.cn;liuxy@jlu.edu.cn
Supported by:
Supported by the National Natural Sciences Foundation of China(Nos.21271082, 21371068).

摘要/Abstract

摘要：

A series of Sr-substituted Gd_1-xSr_xMnO₃(0.1≤ x≤ 0.3) materials was prepared via a standard method involving solid-state reaction. Their crystal structure within the entire doping region was determined to be orthorhombic perovskite type. The magnetic properties of the perovskite Gd_1-xSr_xMnO₃(0.1≤ x≤ 0.3) were thoroughly investigated. It appears that Mn ions with high valence state can induce stronger magnetization, and negative magnetization is evident in the manganites with x=0.1 and x=0.2, suggesting that valence fluctuation plays an important role in such systems. The result of XPS analysis indicates that the valence state of Mn ions is 3.25 and there seems to be excess amounts of oxygen in the structure of Gd_0.8Sr_0.2MnO_3+δ. In addition, the results of magnetization measurements demonstrate that spin reversal occurs only when the applied field is less than 1.99×10⁵ A/m, which presumably could be due to the negative exchange interaction between Mn sub-lattice and Gd sites.

关键词: Perovskite manganite, Solid-state reaction, Negative magnetization, Spin reversal

Abstract:

Key words: Perovskite manganite, Solid-state reaction, Negative magnetization, Spin reversal

ZHANG Yingnan, LI Junjia, ZHANG Ziqing, LIU Fuyang, ZHAO Xudong, LIU Xiaoyang. Negative Magnetism in Perovskite Manganites Gd_1-xSr_xMnO₃(0.1 ≤x ≤0.3)[J]. 高等学校化学研究, 2015, 31(5): 699-703.

ZHANG Yingnan, LI Junjia, ZHANG Ziqing, LIU Fuyang, ZHAO Xudong, LIU Xiaoyang. Negative Magnetism in Perovskite Manganites Gd_1-xSr_xMnO₃(0.1 ≤x ≤0.3)[J]. Chemical Research in Chinese Universities, 2015, 31(5): 699-703.

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Negative Magnetism in Perovskite Manganites Gd_1-xSr_xMnO₃(0.1 ≤x ≤0.3)

Negative Magnetism in Perovskite Manganites Gd_1-xSr_xMnO₃(0.1 ≤x ≤0.3)

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