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http://repositorio.unicamp.br/jspui/handle/REPOSIP/77843
Type: | Artigo de periódico |
Title: | Theoretical and experimental investigation of the electron spin resonance of Co2+ in Zn-2(OH)PO4 and Mg-2(OH)AsO4 |
Author: | Foglio, ME dos Santos, MC Barberis, GE Rojo, JM Mesa, JL Lezama, L Rojo, T |
Abstract: | Electron spin-resonance experiments were performed on Co2+ substituting for Zn2+ or Mg2+ in powder samples of Zn-2(OH)PO4 and Mg-2(OH)AsO4. These two compounds are iso-structural and contain the Co2+ in two environments with approximately octahedral and trigonal bipyramidal structures. The observed resonances are described using a theoretical model that considers the departures from the two perfect structures. It is shown that resonance in the penta-coordinated complex is allowed, and the crystal fields that would reproduce the resonance of the Co2+ in the two environments are calculated. The low intensity of the resonance in the penta-coordinated complex is explained by assuming that this site is much less populated than the octahedral one; this assumption was verified by a molecular calculation of the energies of the two environments, with both Co and Zn as central ions in Zn-2(OH)PO4. |
Country: | Inglaterra |
Editor: | Iop Publishing Ltd |
Citation: | Journal Of Physics-condensed Matter. Iop Publishing Ltd, v. 14, n. 8, n. 2025, n. 2041, 2002. |
Rights: | fechado |
Identifier DOI: | 10.1088/0953-8984/14/8/329 |
Date Issue: | 2002 |
Appears in Collections: | Unicamp - Artigos e Outros Documentos |
Files in This Item:
File | Description | Size | Format | |
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WOS000174564700038.pdf | 327.64 kB | Adobe PDF | View/Open |
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