Investigation of electronic phase segregation in La0.75Ca0.15Sr0.10MnO3 manganite

R. Venkatesh; D. Venkateshwarlu; Nini Pryds

doi:10.1088/1742-6596/534/1/012020

Investigation of electronic phase segregation in La_0.75Ca_0.15Sr_0.10MnO₃ manganite

R. Venkatesh, D. Venkateshwarlu, Nini Pryds

Department of Energy Conversion and Storage

University Grant Commission, New Delhi

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Abstract

The effect of electronic phase segregation in a broad metal-Insulator transition (MIT) observed in La0.75Ca0.25-xSrxMnO3 (x=0.1) composition is investigated using heat capacity, magnetization, electrical resistivity and magnetoresistance measurements. The negative magnetoresistance of 65% in an applied magnetic field of 12T and 15% in 1T with a broad working range of 18K around 300K which is beneficial for room temperature colossal magnetoresistance (CMR) applications. The broad transition in temperature dependent zero field resistivity measurement is analyzed in the light of percolation model indicates the abundance of insulating/metallic clusters in metallic/insulating region. A significant difference between the metallic fraction around the MIT and the ferromagnetic phases observed around the Curie temperature demonstrates the interplay between volume of itinerant and polaronic electronic phases.

Original language	English
Article number	012020
Book series	Journal of Physics: Conference Series (Online)
Volume	534
Issue number	1
Number of pages	4
ISSN	1742-6596
DOIs	https://doi.org/10.1088/1742-6596/534/1/012020
Publication status	Published - 2014
Event	International Conference on Recent Trends in Physics (ICRTP 2014) - Indore, India Duration: 22 Feb 2014 → 23 Feb 2014 http://icrtp2014.com/

Conference

Conference	International Conference on Recent Trends in Physics (ICRTP 2014)
Country/Territory	India
City	Indore
Period	22/02/2014 → 23/02/2014
Internet address	http://icrtp2014.com/

Bibliographical note

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd

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title = "Investigation of electronic phase segregation in La0.75Ca0.15Sr0.10MnO3 manganite",

abstract = "The effect of electronic phase segregation in a broad metal-Insulator transition (MIT) observed in La0.75Ca0.25-xSrxMnO3 (x=0.1) composition is investigated using heat capacity, magnetization, electrical resistivity and magnetoresistance measurements. The negative magnetoresistance of 65% in an applied magnetic field of 12T and 15% in 1T with a broad working range of 18K around 300K which is beneficial for room temperature colossal magnetoresistance (CMR) applications. The broad transition in temperature dependent zero field resistivity measurement is analyzed in the light of percolation model indicates the abundance of insulating/metallic clusters in metallic/insulating region. A significant difference between the metallic fraction around the MIT and the ferromagnetic phases observed around the Curie temperature demonstrates the interplay between volume of itinerant and polaronic electronic phases.",

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note = "Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd; International Conference on Recent Trends in Physics (ICRTP 2014), ICRTP ; Conference date: 22-02-2014 Through 23-02-2014",

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N1 - Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd

PY - 2014

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N2 - The effect of electronic phase segregation in a broad metal-Insulator transition (MIT) observed in La0.75Ca0.25-xSrxMnO3 (x=0.1) composition is investigated using heat capacity, magnetization, electrical resistivity and magnetoresistance measurements. The negative magnetoresistance of 65% in an applied magnetic field of 12T and 15% in 1T with a broad working range of 18K around 300K which is beneficial for room temperature colossal magnetoresistance (CMR) applications. The broad transition in temperature dependent zero field resistivity measurement is analyzed in the light of percolation model indicates the abundance of insulating/metallic clusters in metallic/insulating region. A significant difference between the metallic fraction around the MIT and the ferromagnetic phases observed around the Curie temperature demonstrates the interplay between volume of itinerant and polaronic electronic phases.

AB - The effect of electronic phase segregation in a broad metal-Insulator transition (MIT) observed in La0.75Ca0.25-xSrxMnO3 (x=0.1) composition is investigated using heat capacity, magnetization, electrical resistivity and magnetoresistance measurements. The negative magnetoresistance of 65% in an applied magnetic field of 12T and 15% in 1T with a broad working range of 18K around 300K which is beneficial for room temperature colossal magnetoresistance (CMR) applications. The broad transition in temperature dependent zero field resistivity measurement is analyzed in the light of percolation model indicates the abundance of insulating/metallic clusters in metallic/insulating region. A significant difference between the metallic fraction around the MIT and the ferromagnetic phases observed around the Curie temperature demonstrates the interplay between volume of itinerant and polaronic electronic phases.

U2 - 10.1088/1742-6596/534/1/012020

DO - 10.1088/1742-6596/534/1/012020

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JF - Journal of Physics: Conference Series (Online)

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