Evidence of nanoscale structural phase separation in large bandwidth La0.2Sr0.8MnO3

Bindu, R and Singh, Sanjay and Singh, Navneet and Ranjan, Rajeev and Maiti, Kalobaran and Hill, AH and Barman, SR (2012) Evidence of nanoscale structural phase separation in large bandwidth La0.2Sr0.8MnO3. In: Physical Review B, 86 (14). pp. 140104-1.

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Abstract

We have investigated the structural evolution of La0.2Sr0.8MnO3 using temperature dependent high resolution synchrotron x-ray diffraction technique. In a wide temperature range, La0.2Sr0.8MnO3 reveals nanoscale structural inhomogeneity consisting of cubic and tetragonal phases. The present results suggest that domains of nanometer size of the tetragonal (low temperature) phase start nucleating in the cubic (high temperature) phase even above the Neel temperature (T-N). The tetragonal phase fraction increases substantially below T-N. Detailed analysis suggests that the twinned phase is tetragonal, orbital ordered, and insulating. At temperatures below 170 K, a small amount of the cubic phase is retained. The present results reveal the significance of the connectivity between the nanoscale structural phase separation with the physical properties.

Item Type:	Journal Article
Publication:	Physical Review B
Publisher:	American Physical Society
Additional Information:	Copyright of this article belongs to American Physical Society.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	19 Feb 2013 05:35
Last Modified:	19 Feb 2013 05:35
URI:	http://eprints.iisc.ac.in/id/eprint/45375

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