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Cation distribution and oxidation states in nickel manganites NiMn2O4 and Ni0.8Mn2.2O4 from powder neutron diffraction

✍ Scribed by J.L. Baudour; F. Bouree; M.A. Fremy; R. Legros; A. Rousset; B. Gillot

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 245 KB
Volume: 180-181
Category: Article
ISSN: 0921-4526
DOI: 10.1016/0921-4526(92)90672-f

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✦ Synopsis

The cation distribution has been determined in the nickel manganites NiMnzO, and Ni, sMnz zO, from powder neutron diffraction studies. It strongly depends upon the thermal history of the specimens. Additional information given by MnZt thermogravimetric oxidation experiments, has established the oxidation states of cations on the tetrahedral and octahedral sites of the cubic spine1 structure.

The magnetic structures determined at 1.5 K are in good agreement with the weak values of the spontaneous magnetization.

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