dc.contributor.author |
Seikh, Md Motin
|
|
dc.contributor.author |
Sudheendra, L
|
|
dc.contributor.author |
Rao, C N R
|
|
dc.date.accessioned |
2012-11-27T09:20:41Z |
|
dc.date.available |
2012-11-27T09:20:41Z |
|
dc.date.issued |
2004-10 |
|
dc.identifier |
0022-4596 |
en_US |
dc.identifier.citation |
Journal of Solid State Chemistry 177(10), 3633-3639 (2004) |
en_US |
dc.identifier.uri |
https://libjncir.jncasr.ac.in/xmlui/10572/1089 |
|
dc.description |
Restricted Access |
en_US |
dc.description.abstract |
Magnetic and electron transport properties of four series of manganates of the composition La0.5−xLnxSr0.5MnO3 (Ln=Pr, Nd, Gd and Y) have been investigated to examine how the ferromagnetic metallic nature of the parent La compound changes over to antiferromagnetic insulating behavior, with change in Ln and x due to the associated changes in the A-site cation radius as well as the size disorder. When Ln=Pr and Nd, there is a transition from the tetragonal I4/mcm structure to the orthorhombic Immm and Imma structures at x=0.2 and 0.35, respectively. There is a gradual evolution of the properties from those of La0.5Sr0.5MnO3 to those of Pr0.5Sr0.5MnO3 or Nd0.5Sr0.5MnO3 with increase in x. Thus, when x>0.2 and >0.35, respectively, the Pr- and Nd-substituted manganates show ferromagnetic transitions followed by antiferromagnetic transitions at low temperatures, with the ferromagnetic TC decreasing with increasing x. The Gd and Y series of compounds are all orthorhombic and show a decrease in TC with the increase in x, the ferromagnetism disappearing at high x. At a value of x corresponding to the A-site cation radius of Pr0.5Sr0.5MnO3, the Gd and Y series of compounds exhibit ferromagnetism in the 250–300 K region and undergo an antiferromagnetic transition on cooling. The TC−TN gap is sensitive to the disorder arising from the size mismatch. |
en_US |
dc.description.uri |
http://dx.doi.org/10.1016/j.jssc.2004.06.004 |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Academic Press Inc Elsevier Science |
en_US |
dc.rights |
© 2004 Elsevier Inc |
en_US |
dc.subject |
manganates |
en_US |
dc.subject |
rare earth |
en_US |
dc.subject |
ferromagnetism |
en_US |
dc.subject |
in rare earth manganates |
en_US |
dc.subject |
Jahn-Teller distortion |
en_US |
dc.subject |
size-disorder |
en_US |
dc.subject |
in rare earth manganates |
en_US |
dc.subject |
Rare-Earth Manganates |
en_US |
dc.subject |
Manganese Oxide Perovskites |
en_US |
dc.subject |
A-Site Cations |
en_US |
dc.subject |
Charge |
en_US |
dc.subject |
Transition |
en_US |
dc.subject |
Size |
en_US |
dc.subject |
Magnetoresistance |
en_US |
dc.subject |
Disorder |
en_US |
dc.subject |
Order |
en_US |
dc.subject |
Ca |
en_US |
dc.title |
Magnetic properties of La(0.5-x)Ln(x)Sr(0.5)MnO(3) (Ln = Pr, Nd, Gd and Y) |
en_US |
dc.type |
Article |
en_US |