Oscillatory exchange bias and training effects in nanocrystalline Pr0.5Ca0.5MnO3

Oscillatory exchange bias and training effects in nanocrystalline Pr0.5Ca0.5MnO3

We report on exchange bias effects in 10 nm particles of Pr0.5Ca0.5MnO3 which appear as a result of competing interactions between the ferromagnetic (FM)/anti-ferromagnetic (AFM) phases. The fascinating new observation is the demonstration of the temperature dependence of oscillatory exchange bias (...

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Main Authors: S. Narayana Jammalamadaka, S. S. Rao, S. V. Bhat, J. Vanacken, V. V. Moshchalkov
Format: Article
Language:English
Published: AIP Publishing LLC 2012-03-01
Series:AIP Advances
Online Access:http://dx.doi.org/10.1063/1.3696033
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spelling doaj-ba82adf781d34ccabeb7cc825959680b2020-11-24T22:19:46ZengAIP Publishing LLCAIP Advances2158-32262012-03-0121012169012169-710.1063/1.3696033071201ADVOscillatory exchange bias and training effects in nanocrystalline Pr0.5Ca0.5MnO3S. Narayana Jammalamadaka0S. S. Rao1S. V. Bhat2J. Vanacken3V. V. Moshchalkov4INPAC – Institute for Nanoscale Physics and Chemistry, Nanoscale Superconductivity and Magnetism and Pulsed Fields Group, K.U. Leuven, Celestijnenlaan 200D, B–3001 Leuven, BelgiumINPAC – Institute for Nanoscale Physics and Chemistry, Semiconductor Physics Laboratory, K.U. Leuven, Celestijnenlaan 200D, B–3001 Leuven, BelgiumDepartment of Physics, Indian Institute of Science, Bangalore – 560012, IndiaINPAC – Institute for Nanoscale Physics and Chemistry, Nanoscale Superconductivity and Magnetism and Pulsed Fields Group, K.U. Leuven, Celestijnenlaan 200D, B–3001 Leuven, BelgiumINPAC – Institute for Nanoscale Physics and Chemistry, Nanoscale Superconductivity and Magnetism and Pulsed Fields Group, K.U. Leuven, Celestijnenlaan 200D, B–3001 Leuven, BelgiumWe report on exchange bias effects in 10 nm particles of Pr0.5Ca0.5MnO3 which appear as a result of competing interactions between the ferromagnetic (FM)/anti-ferromagnetic (AFM) phases. The fascinating new observation is the demonstration of the temperature dependence of oscillatory exchange bias (OEB) and is tunable as a function of cooling field strength below the SG phase, may be attributable to the presence of charge/spin density wave (CDW/SDW) in the AFM core of PCMO10. The pronounced training effect is noticed at 5 K from the variation of the EB field as a function of number of field cycles (n) upon the field cooling (FC) process. For n > 1, power-law behavior describes the experimental data well; however, the breakdown of spin configuration model is noticed at n ≥ 1.http://dx.doi.org/10.1063/1.3696033
collection DOAJ
language English
format Article
sources DOAJ
author S. Narayana Jammalamadaka
S. S. Rao
S. V. Bhat
J. Vanacken
V. V. Moshchalkov
spellingShingle S. Narayana Jammalamadaka
S. S. Rao
S. V. Bhat
J. Vanacken
V. V. Moshchalkov
Oscillatory exchange bias and training effects in nanocrystalline Pr0.5Ca0.5MnO3
AIP Advances
author_facet S. Narayana Jammalamadaka
S. S. Rao
S. V. Bhat
J. Vanacken
V. V. Moshchalkov
author_sort S. Narayana Jammalamadaka
title Oscillatory exchange bias and training effects in nanocrystalline Pr0.5Ca0.5MnO3
title_short Oscillatory exchange bias and training effects in nanocrystalline Pr0.5Ca0.5MnO3
title_full Oscillatory exchange bias and training effects in nanocrystalline Pr0.5Ca0.5MnO3
title_fullStr Oscillatory exchange bias and training effects in nanocrystalline Pr0.5Ca0.5MnO3
title_full_unstemmed Oscillatory exchange bias and training effects in nanocrystalline Pr0.5Ca0.5MnO3
title_sort oscillatory exchange bias and training effects in nanocrystalline pr0.5ca0.5mno3
publisher AIP Publishing LLC
series AIP Advances
issn 2158-3226
publishDate 2012-03-01
description We report on exchange bias effects in 10 nm particles of Pr0.5Ca0.5MnO3 which appear as a result of competing interactions between the ferromagnetic (FM)/anti-ferromagnetic (AFM) phases. The fascinating new observation is the demonstration of the temperature dependence of oscillatory exchange bias (OEB) and is tunable as a function of cooling field strength below the SG phase, may be attributable to the presence of charge/spin density wave (CDW/SDW) in the AFM core of PCMO10. The pronounced training effect is noticed at 5 K from the variation of the EB field as a function of number of field cycles (n) upon the field cooling (FC) process. For n > 1, power-law behavior describes the experimental data well; however, the breakdown of spin configuration model is noticed at n ≥ 1.
url http://dx.doi.org/10.1063/1.3696033
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