| Autor: |
Jammalamadaka, S. Narayana, Rao, S. S., Vanacken, J., Stesmans, A., Bhat, S. V., Moshchalkov, V. V. |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
AIP Advances 1, 042151 (2011) |
| Druh dokumentu: |
Working Paper |
| 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: |
arXiv |
| Externí odkaz: |
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