Oscillatory exchange bias and training effects in nanocrystalline Pr0.5Ca0.5MnO3
| Autor: | S. Narayana Jammalamadaka, S. S. Rao, S. V. Bhat, J. Vanacken, V. V. Moshchalkov |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | AIP Advances, Vol 2, Iss 1, Pp 012169-012169-7 (2012) |
| Druh dokumentu: | article |
| ISSN: | 2158-3226 82595968 |
| DOI: | 10.1063/1.3696033 |
| Popis: | 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. |
| Databáze: | Directory of Open Access Journals |
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