SynthesisandcharacterizationofLaNixCo1–xO3:Roleofmicrostructureonmagneticproperties

被引：2

作者：

LChvezGuerrero ^{[1
]}

BMedinaLott ^{[1
,2
]}

RFCienfuegos ^{[1
,3
]}

MAGarzaNavarro ^{[1
,3
]}

RNVannier ^{[4
]}

ARingued ^{[2
]}

M Hinojosa ^{[1
,3
]}

MCassir ^{[2
]}

机构：

[1] Universidad Autónoma de Nuevo León, FIME Cd Universitaria, San Nicolás de los Garza, México, CP , México

[2] Laboratoired’Electrochimie et de Chimie Analytique, UMR CNRS, Chimie Paris Tech ENSCP, rue Pierre et Marie Curie, F- Paris Cedex , France

[3] Centro de Innovación, Investigación y Desarrollo en Ingeniería y Tecnología, PIIT Monterrey, México

[4] Unité de Catalyse et de Chimie du Solide, UMR CNRS, Villeneuve d’Ascq, France

来源：

JournalofRareEarths | 2015年 / 33卷 / 03期

关键词：

Co-doped perovskite; microstructural control; modified sol-gel; ferromagnetic; rare earths;

D O I：

暂无

中图分类号：

O611.2 [结构];

学科分类号：

070301 ; 081704 ;

摘要：

Perovskite-type structures with the composition La Ni x Co1–x O3(x=0.3, 0.5, 0.7) were synthesized by a modified sol-gel method. Using transitional metal elements on the lanthanum base perovskites, properties could be tuned by doping the structure. Thermogravimetric analysis(TGA) evidenced a temperature of 350 °C as the start point of the perovskite-phase formation. Scanning electron microscopy(SEM) images showed the microstructure changes(grain size) of the cobalt-doped perovskite due to composition. In addition, it was shown that magnetic properties of the samples were dependent of cobalt content; experimental results pointed to the existence of disordered spins interactions, which were more evident with the decrease of cobalt content and the existence of ferromagnetic coupling among spins of the samples. These results showed the feasibility of producing a family of compounds with the desired properties, manipulating composition and therefore the microstructure.

引用

页码：277 / 281

页数：5

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