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Structural and magnetic phase transformations in La 0.88 MnO 3 − x crystals

Structural and magnetic phase transformations in La 0.88 MnO 3 − x crystals Abstract The crystal structure and elastic, magnetic, and transport properties of the La0.88MnO3 − x system are studied. It is established that, depending on the oxygen content at x > 0.13, the system is orbitally ordered by the LaMnO3 type and consists of a mixture of orbitally ordered and disordered orthorhombic phases (0.11 ≤ x ≤ 0.13); at x < 0.11, the system is monoclinically distorted. The orbitally ordered samples show properties inherent in both antiferro-and ferromagnetics, whereas the orbitally disordered samples are ferromagnetics and possess extremely high magnetic resistance. Analysis of the structure and properties of the samples showed that no oxygen vacancies are formed in the La0.88MnO3 − x system. It is assumed that the excessive Mn3+ is incorporated into interstitials in the vicinity of lanthanum vacancies. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Crystallography Reports Springer Journals

Structural and magnetic phase transformations in La 0.88 MnO 3 − x crystals

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References (17)

Publisher
Springer Journals
Copyright
2003 MAIK "Nauka/Interperiodica"
ISSN
1063-7745
eISSN
1562-689X
DOI
10.1134/1.1578120
Publisher site
See Article on Publisher Site

Abstract

Abstract The crystal structure and elastic, magnetic, and transport properties of the La0.88MnO3 − x system are studied. It is established that, depending on the oxygen content at x > 0.13, the system is orbitally ordered by the LaMnO3 type and consists of a mixture of orbitally ordered and disordered orthorhombic phases (0.11 ≤ x ≤ 0.13); at x < 0.11, the system is monoclinically distorted. The orbitally ordered samples show properties inherent in both antiferro-and ferromagnetics, whereas the orbitally disordered samples are ferromagnetics and possess extremely high magnetic resistance. Analysis of the structure and properties of the samples showed that no oxygen vacancies are formed in the La0.88MnO3 − x system. It is assumed that the excessive Mn3+ is incorporated into interstitials in the vicinity of lanthanum vacancies.

Journal

Crystallography ReportsSpringer Journals

Published: May 1, 2003

Keywords: Crystallography and Scattering Methods

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