Ferroelectric nanodomains in the uniaxial relaxor system Sr0.61-xBa0.39Nb2O6:Cex3+ -: art. no. 224109

被引：122

作者：

Lehnen, P ^{[1
]}

Kleemann, W

Woike, T

Pankrath, R

机构：

[1] Gerhard Mercator Univ, Lab Angew Phys, D-47048 Duisburg, Germany

[2] Univ Cologne, Inst Mineral, D-50674 Cologne, Germany

[3] Univ Osnabruck, Fachbereich Phys, D-49069 Osnabruck, Germany

来源：

PHYSICAL REVIEW B | 2001年 / 64卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.64.224109

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The domain morphology of the disordered relaxor ferroelectric strontium barium niobate doped with cerium, Sr0.61-xBa0.39Nb2O6Cex3+, has been investigated by piezoelectric force microscopy. The evolution of natural and written domains above the phase-transition temperature T-c reveals a very slow relaxation into a depolarized multicluster state. This hints at strong pinning forces due to quenched random fields. Below T-c zero-field-cooled nanodomains are observed to show fractal-like shapes. Their size distribution can be described by a power law with exponential cutoff in accordance with the random-field Ising model.

引用

页数：5

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