Impact of Quenched Disorder on Magnetotransport Properties in Nd0.55-xSmxSr0.45MnO3 Thin Films
IR@NPL: CSIR-National Physical Laboratory, New Delhi
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| Title |
Impact of Quenched Disorder on Magnetotransport Properties in Nd0.55-xSmxSr0.45MnO3 Thin Films
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| Creator |
Srivastava, Manoj K.
Kaur, Amarjeet Singh, H. K. |
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| Subject |
Applied Physics/Condensed Matter
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| Description |
The effect of size mismatch induced quenched disorder on magnetotransport properties has been studied in polycrystalline Nd0.55-xSmxSr0.45MnO3 (x=0.00, 0.05, 0.15, 0.25, 0.35, and 0.45) thin films (thickness similar to 300nm) prepared on LaAlO3 [LAO (001)] single crystal substrates by chemical spray pyrolysis. X-ray diffraction (XRD) data reveals that the films have oriented growth along out-of-plane (OP) direction. The OP lattice parameter decreases on substitution of Sm3+ ions for Nd3+. The insulator-metal/PM-FM transition temperatures (T-IM/T-C) for all the compositions decrease systematically and the transitions get sharpened as the variance sigma(2) that measures the quenched disorder due to size mismatch. The in-plane and out-of-plane low field magnetoresistance (LFMR) are enhanced appreciably with increasing quenched disorder (sigma(2)). The variation in peak magnetoresistance (maximum MR around TIM) with sigma(2) shows drastic change above sigma(2)= 0.008469 angstrom(2) (x=0.25). The small polaron activation energy also increases appreciably. The observed effects have been explained in terms of the size disorder induced carrier localization.
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| Publisher |
American Institute of Physic
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| Date |
2013
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://npl.csircentral.net/3182/1/Impact%20of%20quenched%20disorder%20on%20magnetotransport.pdf
Srivastava, Manoj K. and Kaur, Amarjeet and Singh, H. K. (2013) Impact of Quenched Disorder on Magnetotransport Properties in Nd0.55-xSmxSr0.45MnO3 Thin Films. Solid State Physics: Proceedings Of The 55th DAE Solid State Physics Symposium 2010, PTS A and B, 1512. pp. 722-723. ISSN 0094-243X |
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| Relation |
http://npl.csircentral.net/3182/
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