EPR EVIDENCE OF EXTRINSIC SYMMETRY-BREAKING DEFECTS IN NOMINALLY PURE KTAO3

被引：18

作者：

PECHENYI, AP

GLINCHUK, MD

AZZONI, CB

SCARDINA, F

PALEARI, A

机构：

[1] UNIV PAVIA,DEPT PHYS ALESSANDRO VOLTA,I-27100 PAVIA,ITALY

[2] UNIV MILAN,DEPT PHYS,I-20133 MILAN,ITALY

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.51.12165

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

EPR measurements on nominally pure (undoped) KTaO3 single crystals at low temperature (4.2 K) are reported. Evidence is brought of impurity defects analyzed through the experimental spin-Hamiltonian parameters. Axial EPR spectra of Fe3+ in different cation positions are detected. An orthorhombic spectrum is found and attributed to Fe3+ substituting for K+ ions and involving nearby potassium vacancies as charge compensators. Manganese impurities are also observed following illumination of the sample to cause a change of the Mn valence state. © 1995 The American Physical Society.

引用

页码：12165 / 12169

页数：5

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