Studies of EPR g factors of the isoelectronic 3d(3) series Cr3+Mn4+ and Fe5+ in SrTiO3 crystals

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	Studies of EPR g factors of the isoelectronic 3d(3) series Cr3+Mn4+ and Fe5+ in SrTiO3 crystals
	W. C. Zheng; X. X. Wu
	2005
发表期刊	Journal of Physics and Chemistry of Solids
ISSN	0022-3697
卷号	66 期号:10 页码:1701-1704
摘要	The g-shifts Ag( = g-g(s), where g(s) approximate to 2.0023 is the free-ion value) of the isoelectronic 3d(3) series Cr3+. Mn4+ and Fe5+ in SrTiO3 crystals are calculated from the high-order perturbation formula based on the cluster approach for 3d3 ion in cubic octahedral site. The formula includes not only the contribution from the crystal-field (CF) mechanism, but also that from the charge-transfer (CT) mechanism (which is omitted in the CF theory). From the calculations, it is found that the contribution Delta g(CT) from the CT mechanism in sign is contrary to the corresponding Delta g(CF) from the CF mechanism and the relative importance of CT mechanism (characterized by vertical bar Delta g(CT)/Delta g(CF)vertical bar) increases with the increasing valence state (and hence the atomic number) of 3d(3) ion. The positive g-shift Delta g of SrTiO3:Fe5+ is due mainly to the contribution of CT mechanism. So, for the explanations of g factors of the high valence state 3d" ions (e.g. Mn4+ and Fe5+) in crystals, the contributions from both CF and CT mechanisms should be taken into account. (c) 2005 Elsevier Ltd. All rights reserved.
部门归属	sichuan univ, dept mat sci, chengdu 610064, peoples r china. civil aviat flying inst china, dept phys, guanghan 618307, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china. fudan univ, natl key lab, surface phys lab, shanghai 200433, peoples r china.;zheng, wc (reprint author), sichuan univ, dept mat sci, chengdu 610064, peoples r china;zhengwc1@163.com
关键词	Oxides Crystal Fields Electronic Paramagnetic Resonance Optical Properties Electron-paramagnetic-resonance Atomic Screening Constants Scf Functions Luminescence Parameters Spectra Temperature Manganese Lattices Csmgbr3
URL	查看原文
WOS记录号	WOS:000234337700017
引用统计	被引频次：34[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35285
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. C. Zheng,X. X. Wu. Studies of EPR g factors of the isoelectronic 3d(3) series Cr3+Mn4+ and Fe5+ in SrTiO3 crystals[J]. Journal of Physics and Chemistry of Solids,2005,66(10):1701-1704.
APA	W. C. Zheng,&X. X. Wu.(2005).Studies of EPR g factors of the isoelectronic 3d(3) series Cr3+Mn4+ and Fe5+ in SrTiO3 crystals.Journal of Physics and Chemistry of Solids,66(10),1701-1704.
MLA	W. C. Zheng,et al."Studies of EPR g factors of the isoelectronic 3d(3) series Cr3+Mn4+ and Fe5+ in SrTiO3 crystals".Journal of Physics and Chemistry of Solids 66.10(2005):1701-1704.