| Autor: |
S. Narayana Jammalamadaka, S. S. Rao, J. Vanacken, A. Stesmans, S. V. Bhat, V. V. Moshchalkov |
| Jazyk: |
angličtina |
| Rok vydání: |
2011 |
| Předmět: |
|
| Zdroj: |
AIP Advances, Vol 1, Iss 4, Pp 042151-042151-9 (2011) |
| Druh dokumentu: |
article |
| ISSN: |
2158-3226 |
| DOI: |
10.1063/1.3664786 |
| Popis: |
We report on isothermal pulsed (20 ms) field magnetization, temperature dependent AC – susceptibility, and the static low magnetic field measurements carried out on 10 nm sized Pr0.5Ca0.5MnO3 nanoparticles (PCMO10). The saturation field for the magnetization of PCMO10 (∼ 250 kOe) is found to be reduced in comparison with that of bulk PCMO (∼300 kOe). With increasing temperature, the critical magnetic field required to ‘melt’ the residual charge-ordered phase decays exponentially while the field transition range broadens, which is indicative of a Martensite-like transition. The AC - susceptibility data indicate the presence of a frequency-dependent freezing temperature, satisfying the conventional Vogel-Fulcher and power laws, pointing to the existence of a spin-glass-like disordered magnetic phase. The present results lead to a better understanding of manganite physics and might prove helpful for practical applications. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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