Agarwal, Vasudha and Sharma, Geetanjali and Siwach, P. K. and Maurya, K. K. and Awana, V. P. S. and Singh, H. K. (2015) Crossover from charge order to strain glass in phase separated manganite thin films: Impact of thermal cycling and substrate induced strain. Solid State Communications, 202. pp. 43-47. ISSN 0038-1098

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The magnetic and electrical transport properties of single crystalline La1-x-yPryCaxMnO3 (x approximate to 0.42, y approximate to 0.40) thin films (similar to 140 nm) deposited on (1 1 0) oriented LaAlO3 and SrTiO3 substrates have been investigated. The magnetotransport properties of these films exhibit substrate dependent phase separation and a crossover from the high temperature antiferromagnetic-charge ordered insulator (AFM-COI) phase (T > T-c to strain glass (T < T-g). At intermediate temperatures (T-g <= T <= T-c) dynamical liquid having prominent thermal-magneto-resistive hysteresis dominates in the cooling cycle while in the warming cycle it is preceded by ferromagnetic metal (FMM) phase. Magnetic fields required to drive AFM-COI to FMM phase transition are higher than required for the strain glass to FMM transformation. The magneto-electric transitions and temperature span of the distinct magnetic regimes are sensitive to the thermal cycling and substrate induced strain.

Item Type: Article
Uncontrolled Keywords: Phase separation Thin film Strainglass Charge order
Subjects: Applied Physics/Condensed Matter
Depositing User: Dr. Rajpal Walke
Date Deposited: 20 Sep 2016 11:14
Last Modified: 20 Sep 2016 11:14

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