|
NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.49 [2011] >
IJPAP Vol.49(05) [May 2011] >
| Title: | Effect of structural disorder on electrical and magneto transport of La0.5Pr0.2R0.3MnO3 (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 La0.5Pr0.2R0.3MnO3 (R = Sr2+
and Ba2+) have been studied to understand the effect of A-site
cationic size disorder (σA2) on their electrical and
magneto transport properties. Epitaxial thin films of La0.5Pr0.2Sr0.3MnO3
(LPSMO) and La0.5Pr0.2Ba0.3MnO3
(LPBMO) were synthesized using Pulsed Laser Deposition (PLD) technique with
desirable thicknesses of 150 nm. In the present paper, it is shown, how Sr+2
and Ba+2 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−1 and −55.1% K−1, respectively. |
| Page(s): | 354-359 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.49(05) [May 2011]
|
|
