Spin-glass shell and magnetotransport properties of a La0.67Ca0.33MnO3 nanoring network

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	Spin-glass shell and magnetotransport properties of a La0.67Ca0.33MnO3 nanoring network
	Zhu, MH ; Zhao, YG ; Cai, W ; Wu, XS ; Gao, SN ; Wang, K ; Luo, LB ; Huang, HS ; Lu, L
刊名	PHYSICAL REVIEW B
	2007
卷号	75 期号:13
ISSN号	1098-0121
中文摘要	The magnetotransport and magnetic property of the La0.67Ca0.33MnO3 (LCMO) nanoring network (NRN) have been investigated. This NRN-LCMO shows a giant magnetoconductance at low temperatures with strong memory effect of magnetic field. Its high field magnetoconductance shows linear field dependence with an anomalously abrupt increase of slope at about 4 T. The magnetic field dependence of the resistance peak in the resistance vs temperature curve strongly depends on the grain size. The most interesting results are the exchange bias effect of magnetization and the resistance relaxation at low temperatures, which suggest the existence of two types of spin glass in the shell of LCMO grains. The magnetotransport behavior of NRN-LCMO was explained by considering the role of the spin-glass shell in the tunneling process with a core-shell model. We emphasized that the shell layers are magnetized by both the external magnetic field and the internal magnetic field induced by the ferromagnetic cores. This work also indicates that the electronic transport of NRN-LCMO can provide some important information on the magnetic state of the nanograin shell.
收录类别	SCI
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/52932]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Zhu, MH,Zhao, YG,Cai, W,et al. Spin-glass shell and magnetotransport properties of a La0.67Ca0.33MnO3 nanoring network[J]. PHYSICAL REVIEW B,2007,75(13).
APA	Zhu, MH.,Zhao, YG.,Cai, W.,Wu, XS.,Gao, SN.,...&Lu, L.(2007).Spin-glass shell and magnetotransport properties of a La0.67Ca0.33MnO3 nanoring network.PHYSICAL REVIEW B,75(13).
MLA	Zhu, MH,et al."Spin-glass shell and magnetotransport properties of a La0.67Ca0.33MnO3 nanoring network".PHYSICAL REVIEW B 75.13(2007).