Martensite-like transition and spin-glass behavior in nanocrystalline Pr0.5Ca0.5MnO3

被引:15
|
作者
Jammalamadaka, S. Narayana [1 ]
Rao, S. S. [2 ,3 ]
Vanacken, J. [1 ]
Stesmans, A. [2 ]
Bhat, S. V. [3 ]
Moshchalkov, V. V. [1 ]
机构
[1] Katholieke Univ Leuven, Pulsed Fields Grp, INPAC, B-3001 Louvain, Belgium
[2] Katholieke Univ Leuven, Semicond Phys Lab, INPAC, B-3001 Louvain, Belgium
[3] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India
来源
AIP ADVANCES | 2011年 / 1卷 / 04期
关键词
ORBITALLY ORDERED MANGANITES; METAMAGNETIC TRANSITIONS; MAGNETIC-FIELD; CHARGE;
D O I
10.1063/1.3664786
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
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 (similar to 250 kOe) is found to be reduced in comparison with that of bulk PCMO (similar to 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. Copyright 2011 Author(s). This article is distributed under a Creative Commons Attribution 3.0 Unported License. [doi:10.1063/1.3664786]
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收藏
页数:9
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