dc.contributor.author |
Kundu, Asish
|
|
dc.contributor.author |
Sarkar, R
|
|
dc.contributor.author |
Pahari, B
|
|
dc.contributor.author |
Ghoshray, A
|
|
dc.contributor.author |
Rao, C N R
|
|
dc.date.accessioned |
2012-12-05T06:42:07Z |
|
dc.date.available |
2012-12-05T06:42:07Z |
|
dc.date.issued |
2007-04 |
|
dc.identifier |
0022-4596 |
en_US |
dc.identifier.citation |
Journal of Solid State Chemistry 180(4), 1318-1324 (2007) |
en_US |
dc.identifier.uri |
https://libjncir.jncasr.ac.in/xmlui/10572/1198 |
|
dc.description |
Restricted Access |
en_US |
dc.description.abstract |
A comparative study of the magnetic properties of a few members of the Ln(0.5)Sr(0.5)CoO(3) family with different radii of the A-site cations, 〈rA〉, in the range 1.19-1.40 A has been carried out. The apparent Tc (where the magnetization undergoes an abrupt increase) decreases markedly with 〈rA〉 as well as the size-disorder arising from the mismatch in the size of the A-site cations. The value of the magnetization at low temperatures decreases markedly with decrease in〈rA〉 or increase in size-disorder, suggesting that the relative proportion of the ferromagnetic (FM) species decreases relative to that of the paramagnetic (PM) species. Such a variation of the FM/ PM ratio with composition and temperature is evidenced from the Mossbauer spectra of La0.5Sr0.5CoO3 as well. The variation of the FM/PM ratio with 〈rA〉 and size-disorder, as well as a local-probe study using Co-59 Nuclear magnetic resonance spectroscopy suggest that electronic phase separation is an inherent feature of the Ln(0.5)Sr(0.5)CoO(3) type cobaltates, with the nature of the different magnetic species in the phase-separated system varying with 〈rA〉 and size disorder. (c) 2007 Elsevier Inc. All rights reserved. |
en_US |
dc.description.uri |
http://dx.doi.org/10.1016/j.jssc.2007.02.003 |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Academic Press Inc Elsevier Science |
en_US |
dc.rights |
© 2007 Elsevier Inc |
en_US |
dc.subject |
Mossbauer spectroscopy |
en_US |
dc.subject |
Itinerant-Electron Ferromagnetism |
en_US |
dc.subject |
Cation Size-Disorder |
en_US |
dc.subject |
Transport-Properties |
en_US |
dc.subject |
La1- Xsrxcoo3 |
en_US |
dc.subject |
System |
en_US |
dc.subject |
Pr |
en_US |
dc.subject |
Gd |
en_US |
dc.subject |
Nd |
en_US |
dc.title |
A Comparative study of the magnetic properties and phase separation behavior of the rare earth cobaltates, Ln0.5Sr0.5CoO3 (Ln = rare earth) |
en_US |
dc.type |
Article |
en_US |