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 |