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

Jammalamadaka, Narayana S and Rao, SS and Bhat, SV and Vanacken, J and Moshchalkov, VV (2012) Oscillatory exchange bias and training effects in nanocrystalline Pr0.5Ca0.5MnO3. In: AIP ADVANCES, 2 (1).

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Abstract

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. Copyright 2012 Author(s). This article is distributed under a Creative Commons Attribution 3.0 Unported License. http://dx.doi.org/10.1063/1.3696033]

Item Type:	Journal Article
Publication:	AIP ADVANCES
Publisher:	AMER INST PHYSICS
Additional Information:	Copyright for this article belongs to the AMER INST PHYSICS
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	01 Aug 2012 12:36
Last Modified:	01 Aug 2012 12:36
URI:	http://eprints.iisc.ac.in/id/eprint/44529

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