Relaxation motion and possible memory of domain structures in barium titanate ceramics studied by mechanical and dielectric losses

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	Relaxation motion and possible memory of domain structures in barium titanate ceramics studied by mechanical and dielectric losses
	Cheng, BL ; Gabbay, M ; Maglione, M ; Fantozzi, G
刊名	JOURNAL OF ELECTROCERAMICS
	2003
卷号	10 期号:1 页码:5
关键词	LEAD-ZIRCONATE-TITANATE FERROELECTRIC CERAMICS ANELASTIC BEHAVIOR INTERNAL-FRICTION WALL MOTION BATIO3 GRAIN SIZE
ISSN号	1385-3449
通讯作者	Cheng, BL (reprint author), Chinese Acad Sci, Ctr Condensed Matter Phys, Inst Phys, Lab Opt Phys, Beijing 100080, Peoples R China.
中文摘要	The relaxation motion and memory effect of domain structures have been investigated using mechanical and dielectric loss measurements in BaTiO3 ceramics with grains sizes varied from 1 mum to 50 mum. The measurements of mechanical loss, elastic modulus, dielectric loss and permittivity show that each phase transition induces a loss peak and an anomaly in the dielectric constants and elastic modulus, furthermore, a number of relaxation loss peaks due to ferroelectric domains in the samples with large grain have been observed. All the relaxation peaks can be analysed by Arrhenius relationship for a wide range of frequency from 10(-2) to 10(6) Hz. The activation energies of relaxation peaks have been determined as 0.92 eV, 0.68 eV, 0.47 eV, and 0.29 eV for the peaks located in the tetragonal, orthorhombic, and rhombohedral phase, with Arrhenius perfactor in the order of 10(-13) s. Moreover, one relaxation process is insensitive to ferroelectric phase transitions, and it can exist in all the ferroelectric phases. This implies a possible memory effect of ferroelectric domain structures. Such a motion of domain wall is limited in fine-grained materials. Effect of vacuum annealing on the relaxation peak in the tetragonal phase is also studied to clarify the mechanisms of the peak. These relaxation peaks could be explained by the interaction between different domain walls and the diffusion of oxygen vacancy in the domains.
收录类别	SCI
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/52036]
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	Cheng, BL,Gabbay, M,Maglione, M,et al. Relaxation motion and possible memory of domain structures in barium titanate ceramics studied by mechanical and dielectric losses[J]. JOURNAL OF ELECTROCERAMICS,2003,10(1):5.
APA	Cheng, BL,Gabbay, M,Maglione, M,&Fantozzi, G.(2003).Relaxation motion and possible memory of domain structures in barium titanate ceramics studied by mechanical and dielectric losses.JOURNAL OF ELECTROCERAMICS,10(1),5.
MLA	Cheng, BL,et al."Relaxation motion and possible memory of domain structures in barium titanate ceramics studied by mechanical and dielectric losses".JOURNAL OF ELECTROCERAMICS 10.1(2003):5.