Magnetic and Electrical Property in Mg2+ Deficient La1.4Sr1.6Mn2O7 Perovskite

Yun Zong; Xu Zhao; Wei Chen

doi:10.4028/www.scientific.net/AMR.936.571

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 936Magnetic and Electrical Property in Mg2+ Deficient...

Magnetic and Electrical Property in Mg²⁺ Deficient La_1.4Sr_1.6Mn₂O₇ Perovskite

Abstract:

The nominal compositions of La_1.4Sr_1.6-xMg_xM_n2O₇ (x=0, 0.1, 0.2, 0.3, 0.4) have been synthesized using solid-state reaction method. The XRD analyses show that the x=0 compound is pure I4/mmm tetragonal bilayered perovskites phase, while they are mixture of an orthorhombic ABO₃-type perovskite and tetragonal bilayered perovskites for x=0.1, 0.2 and 0.3). When x is 0.4, the compound is pure orthorhombic ABO3-type perovskite. For lightly doped samples (x=0.1 and 0.2), the Curie and Nair temperature decreases with the increasing Mg²⁺ doping, while the metal-insulation transformation temperature is 90K and 140K, respectively. For heavy doped samples (x=0.3 and 0.4), the magnetic property shows spin-glass state, and the resistance increases nearly 4 order of magnitudes.

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Advanced Materials Research (Volume 936)

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571-576

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https://doi.org/10.4028/www.scientific.net/AMR.936.571

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June 2014

Authors:

Yun Zong*, Xu Zhao, Wei Chen

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Bilayered Perovskites, Electrical Properties, Magnetic Property

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