Colossal Magnetoresistance and Phase Separation in Manganite Thin Films
IR@NPL: CSIR-National Physical Laboratory, New Delhi
View Archive Info| Field | Value | |
| Title |
Colossal Magnetoresistance and Phase Separation in Manganite Thin Films
|
|
| Creator |
Srivastava, M. K.
Agarwal, V. Kaur, A. Singh, H. K. |
|
| Subject |
Applied Physics/Condensed Matter
|
|
| Description |
In the present work, polycrystalline Sm0.55Sr0.45MnO3 thin films were prepared on LSAT (001) single crystal substrates by ultrasonic nebulized spray pyrolysis technique. The X-ray diffraction theta-2 theta scan reveals that these films (i) have very good crystallinity, (ii) are oriented along out-of-plane c-direction, and (iii) are under small tensile strain. The impact of oxygen vacancy results into (i) higher value of paramagnetic insulator (PMI) to ferromagnetic metal (FMM) transition temperature, i. e., T-C/T-IM, (ii) sharper PMI-FMM transition, (iii) higher value of magnetization and magnetic saturation moment, and (iv) higher value of magnetoresistance (similar to 99%). We suggest here that oxygen vacancy favors FMM phase while oxygen vacancy annihilation leads to antiferromagnetic-charge ordered insulator (AFM-COI) phase. The observed results have been explained in context of phase separation (PS) caused by different fractions of the competing FMM and AFM-COI phases.
|
|
| Publisher |
AIP Publishing
|
|
| Date |
2017
|
|
| Type |
Conference or Workshop Item
PeerReviewed |
|
| Format |
application/pdf
|
|
| Identifier |
http://npl.csircentral.net/2937/1/Colossal%20Magnetoresistance%20and%20Phase%20Separation.pdf
Srivastava, M. K. and Agarwal, V. and Kaur, A. and Singh, H. K. (2017) Colossal Magnetoresistance and Phase Separation in Manganite Thin Films. In: 61ST DAE-SOLID STATE PHYSICS SYMPOSIUM, DEC 26-30, 2016, KIIT Univ, Bhubaneswar, INDIA. |
|
| Relation |
http://npl.csircentral.net/2937/
|
|