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Magnetic Structure and Giant Magnetoresistance of Ferromagnetic La1−δMn1−δO3—An Example of Double-Exchange Striction?

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dc.contributor.author Cheetham, A K
dc.contributor.author Rao, C N R
dc.contributor.author Vogt, T
dc.date.accessioned 2012-11-27T11:02:22Z
dc.date.available 2012-11-27T11:02:22Z
dc.date.issued 1996-11-01
dc.identifier 0022-4596 en_US
dc.identifier.citation Journal Of Solid State Chemistry 126(2), 337-341 (1996) en_US
dc.identifier.uri https://libjncir.jncasr.ac.in/xmlui/10572/1102
dc.description Letter. Restricted Access. en_US
dc.description.abstract A neutron powder diffraction study of the structure of the rhombohedral phase of La1−δMn1−δO3(δ = 0.04) as a function of temperature has been carried out. The crystal structure is well described at all temperatures by a model inR− 3c(a= 5.52264(5) andc= 13.3309(5) at 300 K) and the low temperature data contain magnetic contributions to the Bragg scattering due to ferromagnetic ordering below Tc∼ 200 K. The spin is canted at approximately 45° from [001]. The Mn–O–Mn angle decreases on cooling toTc, but shows a slight increase on further cooling, presumably due to the onset of a double-exchange striction effect. Resistivity and magnetization data corroborate the neutron findings and reveal an insulator to metal transition close toTcwith a negative giant magnetoresistance value of ∼50% at this temperature. The results confirm the striking similarity between the structural, magnetic, and conducting properties of rhombohedral La1−δMn1−δO3and those of the solid solution La1−xAxMnO3(x∼ 0.3). en_US
dc.description.uri http://dx.doi.org/10.1006/jssc.1996.0347 en_US
dc.language.iso en en_US
dc.publisher Academic Press Inc en_US
dc.rights © 1996 Academic Press en_US
dc.subject Defect Structure en_US
dc.subject Lamno3 en_US
dc.title Magnetic Structure and Giant Magnetoresistance of Ferromagnetic La1−δMn1−δO3—An Example of Double-Exchange Striction? en_US
dc.type Article en_US


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