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

Using injection MOCVD technique a series of epitaxial thin films of La and Nd manganites were prepared. Epitaxial stabilisation of high-pressure phase NdMn 7O 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...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2000-03, Vol.211 (1), p.61-66
Main Authors: Bosak, A.A., Gorbenko, O.Yu, Kaul, A.R., Graboy, I.E., Dubourdieu, C., Senateur, J.P., Zandbergen, H.W.
Format: Article
Language:English
Subjects:
Epitaxial stabilisation
Magnetoresistance
Manganites
MOCVD
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Summary:Using injection MOCVD technique a series of epitaxial thin films of La and Nd manganites were prepared. Epitaxial stabilisation of high-pressure phase NdMn 7O 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.
ISSN:0304-8853
DOI:10.1016/S0304-8853(99)00714-3