EPR and optical absorption studies of VO2+ doped L-alanine (C3H7NO2) single crystals

被引：9

作者：

Biyik, Recep ^{[1
]}

机构：

[1] Ondokuz Mayis Univ, Fac Arts & Sci, Dept Phys, TR-55139 Samsun, Turkey

来源：

PHYSICA B-CONDENSED MATTER | 2009年 / 404卷 / 20期

关键词：

L-Alanine; EPR; Absorption spectrum; Vanadyl ion; ELECTRON-PARAMAGNETIC-RES; BETA-CELL LINE; VANADYL ION; RESONANCE; COMPLEXES; SPECTRA; CU2+;

D O I：

10.1016/j.physb.2009.05.039

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

VO2+ doped L-alanine (C3H7NO2) single crystals and powders are examined by electron paramagnetic resonance (EPR) and optical absorption spectroscopy. Three magnetically different sites are resolved from angular variations Of L-alanine single crystal EPR spectra. In some specific orientations each VO2+ line splits into three superhyperfine lines with intensities of 1:2:1 and maximum splitting value of 2.23 mT. The local symmetries of VO2+ complex sites are nearly axial. The optical absorption spectra show three bands. Spin Hamiltonian parameters are measured and molecular orbital coefficients are calculated by correlating EPR and optical absorption data for the central vanadyl ion. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：3483 / 3486

页数：4

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