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Magnetic properties of La(0.5-x)Ln(x)Sr(0.5)MnO(3) (Ln = Pr, Nd, Gd and Y)

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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


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