提出了新的掺杂离子局域结构畸变模型,称之为配体离子移动模型,建立了此模型下晶体微观结构与电子顺磁共振(EPR)参量之间的定量关系.首次在考虑SS(spin-spin)、SOO(spin-other-orbit)和OO(orbit-orbit)作用的基础上,采用全组态完全对角化方法,对ZnAl2O4∶Cr3+晶体的局域晶格畸变、EPR参量及其电子精细光谱进行了系统的研究,结果表明,Cr3+离子掺入ZnAl2O4晶体后,O2-离子在氧平面上向远离[111]轴的方向移动了(0.01777±0.00007)nm.从而成功地解释了ZnAl2O4∶Cr3+晶体的EPR参量.同时研究也表明,OO磁相互作用并不引起新的能级分裂,只使能级产生移动,能级移动达到10cm-1的量级,但对ZFS参量的贡献甚微.
参考文献
[1] | 杨子元.Al2O3:Cu3+晶体EPR参量及其晶格畸变研究[J].功能材料,2000(05):544-545,550. |
[2] | Zheng W C.[J].PHYSICAL REVIEW B,1992(06):3156-3157. |
[3] | Yang Z Y.[J].Journal of Physics:Condensed Matter:4091-4096. |
[4] | Zheng W C;Wu S Y.[J].Zeitschrift für Naturforschung:925-928. |
[5] | Yang ZY.;Rudowicz C.;Yeung YY. .Spin Hamiltonian and structural disorder analysis for two high temperature Cr3+ defect centers in alpha-LiIO3 crystals - low symmetry effects[J].The journal of physics and chemistry of solids,2003(5):887-896. |
[6] | Zheng W C.[J].PHYSICAL REVIEW B,1987(16):8774-8776. |
[7] | Zhou Y Y.[J].PHYSICAL REVIEW B,1991(13):11374-11376. |
[8] | Wood D L;Imbusch G F;Macfarlane R M.[J].Journal of Chemical Physics,1968(11):5255-5236. |
[9] | Macfarlane R M.[J].PHYSICAL REVIEW B,1970:989-1004. |
[10] | Mikenda W;Preisinger A.[J].Journal of Luminescence,1981:53-66. |
[11] | Mikenda W;Preisinger A.[J].Journal of Luminescence,1981:67-83. |
[12] | Derkosch J;Mikenda W.[J].Journal of Luminescence,1983(04):431-441. |
[13] | Gesmundo F;Asmundis C .[J].Chemical Physics,1974,4(02):307-313. |
[14] | 杨子元,邰持明,郑俊博.ZnAl2O4:Cr3+晶体4A2基态ZFS及其三角晶格畸变研究[J].波谱学杂志,1999(04):325-330. |
[15] | 杨子元,魏群.三角对称晶场中 4 A2(3d3 )态离子EPR参量的SS和SOO机制[J].化学物理学报,2004(04):401-406. |
[16] | Rudowicz C;Yang Z Y;Yeung Y Y.[J].Journal of Physics and Chemistry of Solids:1419-1428. |
[17] | Yang Z Y;Hao Y;Rudowicz C.[J].Journal of Physics:Condensed Matter:3481-3494. |
[18] | 魏群,杨子元.Cr3+:MgAl2O4晶体EPR参量及其电子精细光谱的研究[J].波谱学杂志,2004(01):25-32. |
[19] | 杨子元.三角晶场中4A2(3d3)态离子全组态EPR理论研究[J].化学物理学报,2000(02):190-196. |
[20] | Yu W L;Zhang X M;Yang L X.[J].PHYSICAL REVIEW B,1994:6856-6864. |
[21] | Wybourne B G.[J].Journal of Physics C:Solid State Physics:1457-1458. |
[22] | Judd B R.Operator Techniques in Atomic Spectroscopy[M].New York: McGraw-Hill Book Company,1963 |
[23] | Marvin H H.[J].Physical Review,1947:102-110. |
[24] | Horie H.[J].Progress of Theoretical Physics,1953(03):296-308. |
[25] | Blume M;Watson R E.[J].Proceedings of the Royal Society of London,1963:565-578. |
[26] | Yu W L.[J].Journal of Sichuan Normal University,2002(06):606-614. |
[27] | Zheng W C.[J].PHYSICAL REVIEW B,1992(18):12030-12033. |
[28] | Zhou Y Y.[J].PHYSICAL REVIEW B,1990(02):917-919. |
[29] | Newman D J;Betty N .[J].Reports on Progress in Physics,1989,52:699-763. |
[30] | Yeung Y Y;Newman D J.[J].PHYSICAL REVIEW B,1986(04):2258-2265. |
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