Fe3+ defect dipole centers in ferroelectric PbTiO3 studied using electron paramagnetic resonance

被引：20

作者：

Keeble, D. J. ^{[1
]}

Loyo-Menoyo, M. ^{[1
]}

Booq, Z. I. Y. ^{[1
]}

Garipov, R. R. ^{[1
]}

Eremkin, V. V. ^{[2
]}

Smotrakov, V. ^{[2
]}

机构：

[1] Univ Dundee, Carnegie Lab Phys, Sch Engn Phys & Math, Dundee DD1 4HN, Scotland

[2] Rostov State Univ, Inst Phys, Rostov Na Donu 344090, Russia

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 01期

关键词：

annealing; charge compensation; crystal symmetry; dielectric polarisation; ferroelectric materials; hyperfine structure; lead compounds; paramagnetic resonance; vacancies (crystal); S-STATE; ALIGNMENT; CRYSTALS; TITANATE; FATIGUE; STRAIN; OXIDES; EPR;

D O I：

10.1103/PhysRevB.80.014101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Three Fe3+ centers with tetragonal symmetry and with the defect axis parallel to the polarization direction were detected in ferroelectric PbTiO3 crystals using electron paramagnetic resonance. All exhibit large zero-field splittings (ZFS). Two are assigned to Fe3+-oxygen vacancy dipole defect complexes, and the third to the isolated Fe3+ with distant charge compensation. The Fe3+-V-O defect with the largest ZFS converts to the second stable center on annealing; comparison of the cubic ZFS terms show the in-plane oxygen ligands relax outwards in stable center.

引用

页数：7

共 26 条

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