Theoretical studies of the g factors and local structure for Pt3+ in α-Al 2 O 3

Autor:	Li-Li Li, S. Y. Wu, Zhiyao Zhang, Shi-chuan Zhang
Rok vydání:	2012
Předmět:	Physics Valence (chemistry) Octahedron Impurity law Doping General Physics and Astronomy Perturbation (astronomy) Atomic physics Electron paramagnetic resonance Anisotropy law.invention Ion
Zdroj:	Pramana. 78:475-482
ISSN:	0973-7111 0304-4289
DOI:	10.1007/s12043-011-0250-9
Popis:	The anisotropic g factors and local structure for the trigonal Pt3+ centre in alpha-Al2O3 are theoretically investigated from the perturbation formulas of the g factors for a 5d(7) ion in trigonal symmetry. The Pt3+ impurity is found to experience an outward displacement by about 0.18 angstrom away from the centre of the oxygen octahedron along the C-3-axis. The calculated g factors based on the above axial displacement show good agreement with the observed values. Importantly, the pending problem of +3 valence state of the doped Pt in alpha-Al2O3 is theoretically clarified, and the possibility of Pt+ (5d(9)) is thus excluded in this work.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::da6782cde4217873fdee31f116e5792c https://doi.org/10.1007/s12043-011-0250-9 Zobrazit plný text záznamu Plný text ve formátu PDF