Electrochemical Synthesis of Ferromagnetic LaMnO3 and Metallic NdNiO3

Electrochemical Synthesis of Ferromagnetic LaMnO3 and Metallic NdNiO3
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铁磁LaMnO3和金属NdNiO3的电化学合成

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发表时间:
1995
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通讯作者:
C. Rao
C. Rao
中科院分区:
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文献类型:
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作者:
R. Mahesh;K. Kannan;C. Rao

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虽然通常制备的 $NdNiO_{3-delta}$ 高度缺氧,并且在低温下表现出金属-绝缘体转变,但通过电化学氧化可以制备近乎金属的 $NdNiO_3- delta$ $(delta = 0.05)$。在进行电化学氧化时,斜方晶系绝缘 $LaMnO_3$ 转变为菱形结构,然后转变为立方结构。最后两相是铁磁相并表现出金属-绝缘体转变。
While $NdNiO_{3-delta}$ prepared ordinarily is highly oxygen-deficient and exhibits a metal-insulator transition at low temperature, it has been possible to prepare nearly metallic $NdNiO_3- delta$ $(delta = 0.05)$ by electrochemical oxidation. On progressive electrochemical oxidation, orthorhombic, insulating $LaMnO_3$ transforms to a rhornbohedral and then to a cubic structure. The last two phases are ferromagnetic and exhibit metal-insulator transitions.