Structure, magnetic and magnetoresistive properties of La0.7Sr0.3Mn1−xSnxO3 samples (0≤x≤0.20)

Autor:	S. Pignard, H. Vincent, N. Kallel, Karol Fröhlich, Mohamed Oumezzine
Rok vydání:	2005
Předmět:	Magnetoresistance Condensed matter physics Magnetic moment Chemistry Mechanical Engineering Doping Metals and Alloys Ion Nuclear magnetic resonance Mechanics of Materials Electrical resistivity and conductivity Superexchange Materials Chemistry Curie temperature Crystallite
Zdroj:	Journal of Alloys and Compounds. 399:20-26
ISSN:	0925-8388
DOI:	10.1016/j.jallcom.2005.03.019
Popis:	Structural, magnetic, and transport properties of polycrystalline La0.7Sr0.3Mn1−xSnxO3 have been experimentally investigated. Single-phase samples were obtained in the range 0 ≤ x ≤ 0.20 by a conventional solid-state reaction method in air. The substitution of Sn4+ at the Mn site results in a significant lattice expansion, a reduction in the Curie temperature TC and in the magnetic moment per Mn ion. In addition, gradual changes in the resistivity behaviour are observed in the Sn-doped samples leading to an enhancement of the magnetoresistance at low doping ratio. The results are analysed in relation to the variation in the Mn3+–O2−–Mn4+ network and to the magnetic disorder caused by the presence of the large and nonmagnetic Sn4+ ions in the Mn sublattice.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e95826156030c0c1663c56fc2d36ced4 https://doi.org/10.1016/j.jallcom.2005.03.019 Zobrazit plný text záznamu Full Text from ScienceDirect