Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/11606
Title: Effect of structural disorder on electrical and magneto transport of La<sub>0.5</sub>Pr<sub>0.2</sub>R<sub>0.3</sub>MnO<sub>3</sub> (R = Sr and Ba) manganite films
Authors: Markna, J H
Solanki, P S
Khachar, U D
Thaker, C M
Rana, D S
Kuberkar, D G
Keywords: Manganite films
Structural disorder
Magneto transport
Pulsed laser deposition
Issue Date: May-2011
Publisher: NISCAIR-CSIR, India
Abstract: The manganite thin films La<sub>0.5</sub>Pr<sub>0.2</sub>R<sub>0.3</sub>MnO<sub>3</sub> (R = Sr<sup>2+</sup> and Ba<sup>2+</sup>) have been studied to understand the effect of A-site cationic size disorder (σ<sub>A</sub><sup>2</sup>) on their electrical and magneto transport properties. Epitaxial thin films of La<sub>0.5</sub>Pr<sub>0.2</sub>Sr<sub>0.3</sub>MnO<sub>3</sub> (LPSMO) and La<sub>0.5</sub>Pr<sub>0.2</sub>Ba<sub>0.3</sub>MnO<sub>3</sub> (LPBMO) were synthesized using Pulsed Laser Deposition (PLD) technique with desirable thicknesses of 150 nm. In the present paper, it is shown, how Sr<sup>+2</sup> and Ba<sup>+2</sup> substitution at La-site leads to half-metallicity in LPSMO and low temperature resistivity minima in LPBMO films, respectively. It is observed that the resistivity and high field magneto resistance (HFMR) increase to ~ 55% in LPSMO and ~ 95% in LPBMO films with increasing size disorder. The increase in cation size disorder in LPBMO as compared to LPSMO, results in high values of positive and negative temperature coefficient of resistance (TCR) ~ 59.8%K<sup>−1</sup> and −55.1% K<sup>−1</sup>, respectively.
Description: 354-359
URI: http://hdl.handle.net/123456789/11606
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.49(05) [May 2011]

Files in This Item:
File Description SizeFormat 
IJPAP 49(5) 354-359.pdf131.79 kBAdobe PDFView/Open


Items in NOPR are protected by copyright, with all rights reserved, unless otherwise indicated.