Defect structure and formation of defect complexes in Cu2+-modified metal oxides derived from a spin-Hamiltonian parameter analysis

被引：38

作者：

Eichel, Ruediger-A. ^{[1
]}

Drahus, Michael D. ^{[1
]}

Jakes, Peter ^{[1
]}

Eruenal, Ebru ^{[1
]}

Erdem, Emre ^{[1
]}

Parashar, S. K. S. ^{[2
]}

Kungl, Hans ^{[3
]}

Hoffmann, Michael J. ^{[3
]}

机构：

[1] Univ Freiburg, Inst Phys Chem 1, D-79104 Freiburg, Germany

[2] Indian Inst Technol, Dept Phys & Meteorol, Kharagpur 721302, W Bengal, India

[3] Univ Karlsruhe, Inst Ceram Mech Engn, D-76131 Karlsruhe, Germany

来源：

MOLECULAR PHYSICS | 2009年 / 107卷 / 19期

关键词：

ferroelectrics; defect structure; copper doping; oxygen vacancy; defect dipole; ELECTRON-PARAMAGNETIC-RESONANCE; ZIRCONATE-TITANATE CERAMICS; DOPED BATIO3; COPPER; EPR; ESR; TRANSITION; CU2+; MGO; POLYCRYSTALLINE;

D O I：

10.1080/00268970903084920

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The nearest neighbour oxygen octahedron about copper functional centres in metal oxides has been systematically studied by means of electron paramagnetic resonance (EPR) spectroscopy. In particular, the determined g vertical bar,zz and [image omitted] spin-Hamiltonian parameters were analysed, finding linear dependences as a function of chemical bonding and local distortion of the oxygen octahedron. Moreover, through the introduction of a dimensionless coordination parameter , different defect structures with respect to the number of coordinated oxygen vacancies may be distinguished. This allows for a distinct assignment of defect complexes between the copper functional centre with one or two oxygen vacancies.

引用

页码：1981 / 1986

页数：6

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