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arXiv · 1408.2966

Crossover from charge order to strain glass in phase separated manganite thin films: Impact of thermal cycling and substrate induced strain

Vasudha Agarwal·P. K. Siwach·V. P. S. Awana·H. K. Singh
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Abstract

The magnetic and magnetotransport properties of single crystalline La1-x-yPryCaxMnO3 (x=0.42, y=0.40) thin films (~140 nm) deposited on (110) oriented LaAlO3 and SrTiO3 substrates exhibit a crossover from the high temperature antiferromagnetic-charge ordered insulator (AFM-COI) phase (T>TN) to strain glass (T<Tg). At intermediate temperatures (Tg<T<TN) 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 field required to drive AFM-COI to FMM phase transition are higher than that for the strain glass. The magneto-electric nature and temperature span of the distinct magnetic regimes are sensitive to the thermal cycling and substrate induced strain.

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Vasudha Agarwal, P. K. Siwach, V. P. S. Awana, H. K. Singh. 2014-08-13. Crossover from charge order to strain glass in phase separated manganite thin films: Impact of thermal cycling and substrate induced strain. https://doi.org/10.1016/j.ssc.2014.10.018

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