Abstract

The magnetic and structural transitions in rhombohedral La_0.7Sr_0.3Co_1 – xNb_xO₃ and cubic La_0.3Sr_0.7Co_1 – xNb_xO₃ have been studied as a function of Nb content and temperature by using of neutron and X-ray diffraction. The increase in the Nb concentration leads to the gradual increase in the lattice volume and significant decrease in the magnetic moment which completely disappears at the niobium doping level higher than 0.1. No essential structure changes and rhombohedral distortions have been found.

中文翻译：

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Nb掺杂钴氧化物中磁性和结构跃迁的中子衍射研究

摘要

利用中子和X，研究了菱面体La _0.7 Sr _0.3 Co _{1 –  x} Nb _x O ₃和立方La _0.3 Sr _0.7 Co _{1 –  x} Nb _x O _3中的磁性和结构转变与Nb含量和温度的关系。射线衍射。Nb浓度的增加会导致晶格体积的逐渐增加和磁矩的显着下降，而在铌掺杂水平高于0.1时，磁矩会完全消失。没有发现必要的结构变化和菱形的扭曲。