Cation and oxygen nonstoichiometry in R-Mn-O (R = La, Nd) bulk samples and thin films

被引:47
作者
Bosak, AA [1 ]
Gorbenko, OY
Kaul, AR
Graboy, IE
Dubourdieu, C
Senateur, JP
Zandbergen, HW
机构
[1] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, Russia
[2] Inst Natl Polytech Grenoble, Mat & Genie Phys Lab, F-38402 St Martin Dheres, France
[3] Delft Univ Technol, Mat Sci Lab, Natl Ctr HREM, NL-2628 AL Delft, Netherlands
关键词
MOCVD; manganites; magnetoresistance; epitaxial stabilisation;
D O I
10.1016/S0304-8853(99)00714-3
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Using injection MOCVD technique a series of epitaxial thin films of La and Nd manganites were prepared. Epitaxial stabilisation of high-pressure phase NdMn(7)O(12) in thin films was observed for low Nd content. For ceramic samples reduced in the flowing Ar with increase of La-vacancy concentration Mn(2+) appearance and collapse of static JT-distortion were observed. Oxidation of manganites stabilises vacancies in A-sublattice of perovskite, which results in the broadening of homogeneity area. For La/Mn and Nd/Mn cation-stoichiometric composition 1 : 1 a shift of oxygen solubility boundary was observed. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:61 / 66
页数:6
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