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Multiple magnetic transitions and magnetocaloric effect in hydrothermally synthesized single crystalline La0.5Sr0.5MnO3 nanowires

Published online by Cambridge University Press:  12 July 2012

Sayan Chandra
Affiliation:
Department of Physics, University of South Florida, Tampa, FL 33620, USA
Anis Biswas
Affiliation:
Department of Physics, University of South Florida, Tampa, FL 33620, USA
Subarna Datta
Affiliation:
Unit for Nanoscience, S N Bose National Centre for Basic Science, Kolkata 700098, India
Barnali Ghosh
Affiliation:
Unit for Nanoscience, S N Bose National Centre for Basic Science, Kolkata 700098, India
A.K. Raychaudhuri
Affiliation:
Unit for Nanoscience, S N Bose National Centre for Basic Science, Kolkata 700098, India
M.H. Phan
Affiliation:
Department of Physics, University of South Florida, Tampa, FL 33620, USA
H. Srikanth
Affiliation:
Department of Physics, University of South Florida, Tampa, FL 33620, USA
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Abstract

We have successfully prepared La0.5Sr0.5MnO3nanowires using a novel hydrothermal synthesis process and studied their magnetic and magnetocaloric properties. The system exhibits an inverse magnetocaloric effect (IMCE) around 175 K indicating presence of significant AFM correlation. The MCE study reveals a clear paramagnetic (PM) to ferromagnetic (FM) transition near room temperature (T ~ 325K) which is followed by onset of AFM at lower temperatures. The development of the FM-like magnetic state at low temperature is attributed to the enhanced double exchange (DE) driven ferromagnetism in AFM state as predicted by recent theoretical studies.

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Copyright © Materials Research Society 2012

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Multiple magnetic transitions and magnetocaloric effect in hydrothermally synthesized single crystalline La0.5Sr0.5MnO3 nanowires
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Multiple magnetic transitions and magnetocaloric effect in hydrothermally synthesized single crystalline La0.5Sr0.5MnO3 nanowires
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Multiple magnetic transitions and magnetocaloric effect in hydrothermally synthesized single crystalline La0.5Sr0.5MnO3 nanowires
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