Magnetotransport in the La1.2(Sr, Ca)1.8Mn2O7 solid solution
VELÁZQUEZ, Matias
Institut d'électronique fondamentale [IEF]
Laboratoire de Physico-Chimie de l'État Solide [CHIMSOL]
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Institut d'électronique fondamentale [IEF]
Laboratoire de Physico-Chimie de l'État Solide [CHIMSOL]
VELÁZQUEZ, Matias
Institut d'électronique fondamentale [IEF]
Laboratoire de Physico-Chimie de l'État Solide [CHIMSOL]
< Reduce
Institut d'électronique fondamentale [IEF]
Laboratoire de Physico-Chimie de l'État Solide [CHIMSOL]
Language
en
Article de revue
This item was published in
Journal of Physics: Condensed Matter. 2002, vol. 14, n° 26, p. 6667-6674
IOP Publishing
English Abstract
High-quality single crystals of La1.2Sr1.8 −y Cay Mn2O7 (0 ≤ y ≤ 0.2) were studied by means of electrical resistivity and magnetoresistance measurements. They exhibit a phase transition to a metallic ferromagnetic state ...Read more >
High-quality single crystals of La1.2Sr1.8 −y Cay Mn2O7 (0 ≤ y ≤ 0.2) were studied by means of electrical resistivity and magnetoresistance measurements. They exhibit a phase transition to a metallic ferromagnetic state at low temperature and strongly anisotropic electronic transport properties, which result from their lamellar structure. The temperature range of the resistivity measurements is extended up to about 1000 K, which allows us to discriminate between different theoretical models. In addition, an accurate comparison of parallel and perpendicular resistivity is carried out in order to reveal the effect of the two-dimensional magnetic correlations. The effect of disorder achieved by substitution of Ca2+, of smaller ionic radius, for Sr2+ is also investigated in detail.Read less <
Origin
Hal imported