Dynamic properties of cluster glass in La(0.25)Ca(0.75)MnO(3) nanoparticles

IMR OpenIR

	Dynamic properties of cluster glass in La(0.25)Ca(0.75)MnO(3) nanoparticles
	X. H. Huang; J. F. Ding; Z. L. Jiang; Y. W. Yin; Q. X. Yu; X. G. Li
	2009
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	106 期号:8
摘要	The dynamic magnetic properties of cluster glass in La(0.25)Ca(0.75)MnO(3) nanoparticles with average particle size range from 40 to 1000 nm have been investigated by measuring the frequency and dc magnetic field (H) dependencies of the ac susceptibility. The frequency-dependent T(f), the freezing temperature of the ferromagnetic clusters determined by the peak in the real part of the ac susceptibility chi' versus T curve with H=0, is fit to a power law. The relaxation time constant tau(0) decreases as the particle size increases from 40 to 350 nm, which indicates the decrease in the size of the clusters at the surface of the nanoparticle. The relationship between H and T(f)(H) deviates from the De Almeida-Thouless-type phase boundary at relatively high fields for the samples with size range from 40 to 350 nm. Moreover, for the samples with particle sizes of 40 and 100 nm, tau(0) increases with increasing H, which indicates the increasing cluster size and may be ascribed to the competition between the influence of H and the local anisotropy field in the shell spins. All these results may give rise to a new insight into the behaviors of the cluster glass state in the nanosized antiferromagnetic charge-ordered perovskite manganites. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3246869]
部门归属	[huang, x. h.] univ sci & technol china, dept phys, hefei natl lab phys sci microscale, hefei 230026, peoples r china. acad sinica, int ctr mat phys, shenyang 110015, peoples r china.;huang, xh (reprint author), univ sci & technol china, dept phys, hefei natl lab phys sci microscale, hefei 230026, peoples r china;lixg@ustc.edu.cn
关键词	Spin-glass Behavior Magnetization Phase Susceptibility La0.5sr0.5coo3 Fulcher Systems State Law
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31984
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. H. Huang,J. F. Ding,Z. L. Jiang,et al. Dynamic properties of cluster glass in La(0.25)Ca(0.75)MnO(3) nanoparticles[J]. Journal of Applied Physics,2009,106(8).
APA	X. H. Huang,J. F. Ding,Z. L. Jiang,Y. W. Yin,Q. X. Yu,&X. G. Li.(2009).Dynamic properties of cluster glass in La(0.25)Ca(0.75)MnO(3) nanoparticles.Journal of Applied Physics,106(8).
MLA	X. H. Huang,et al."Dynamic properties of cluster glass in La(0.25)Ca(0.75)MnO(3) nanoparticles".Journal of Applied Physics 106.8(2009).