dc.contributor.author |
Verelst, M
|
|
dc.contributor.author |
Rangavittal, N
|
|
dc.contributor.author |
Rao, C N R
|
|
dc.contributor.author |
Rousset, A
|
|
dc.date.accessioned |
2012-12-05T08:38:20Z |
|
dc.date.available |
2012-12-05T08:38:20Z |
|
dc.date.issued |
1993-05 |
|
dc.identifier |
0022-4596 |
en_US |
dc.identifier.citation |
Journal of Solid State Chemistry 104(1), 74-80 (1993) |
en_US |
dc.identifier.uri |
https://libjncir.jncasr.ac.in/xmlui/10572/1206 |
|
dc.description |
Restricted Access |
en_US |
dc.description.abstract |
LaMnO3+δ samples with Mn4+ content up to 50% have been prepared by different methods. The structure of LaMnO3+δ changes from orthorhombic to cubic (via rhombohedral) with increase in the Mn4+ content. LaMnO3+δ samples containing greater than 20% Mn4+ are ferromagnetic and show resistivity maxima at a temperature Tt which is close to the ferromagnetic Curie temperature. The resistivity maximum is due to the occurrence of a metal-insulator transition. In samples heated to the same temperature, the value of Tt increases with % Mn4+. For a given sample, Tt increases with the temperature of heat treatment due to the increase in particle size. The onset of ferromagnetism in LaMnO3+δ accompanied by an insulator-metal transition is similar to that found in La1-xCaxMnO3 and La1-xSrxCoO3. |
en_US |
dc.description.uri |
http://dx.doi.org/10.1006/jssc.1993.1142 |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Academic Press Inc |
en_US |
dc.rights |
© 1993 Academic Press Inc |
en_US |
dc.subject |
Experimental study |
en_US |
dc.subject |
Electrical conductivity |
en_US |
dc.subject |
Metal insulator transition |
en_US |
dc.subject |
Temperature |
en_US |
dc.subject |
Thermal annealing |
en_US |
dc.subject |
Ferromagnetism |
en_US |
dc.subject |
Chemical composition |
en_US |
dc.subject |
Inorganic compound |
en_US |
dc.subject |
Manganese Lanthanum Oxides Mixed |
en_US |
dc.subject |
Transition metal Compounds |
en_US |
dc.subject |
Lanthanide Compounds |
en_US |
dc.title |
Metal-Insulator Transitions In Anion-Excess Lamno3+δ Controlled By The Mn4+ Content |
en_US |
dc.type |
Article |
en_US |