Artículo
Abstract:
The constants corresponding to the spin-Hamiltonian terms without cylindrical symmetry for Mn2+ in calcite (CaCO3) have been measured by EPR techniques; it is shown that the principal axes of the spin Hamiltonian are rotated 15.5°from the crystal axes. This value allows us to obtain information about the charge distribution of the carbonate ligands. Our result is in agreement with the predictions of a simple covalent model for the carbonates. We measured also the angular variation of the linewidth of an EPR transition; our data allow us to explain the source of the inhomogeneous broadening for Mn2+ in our sample as random internal stresses. We compare our results with previous data obtained for Mn2+ in CaWO4 where the source of broadening is a distribution of point defects in the sample. A method for finding the source of inhomogeneous broadening in sites of low symmetry is discussed. © 1975 The American Physical Society.
Registro:
| Documento: | Artículo |
| Título: | EPR spectra and linewidths of Mn2+ in calcite |
| Autor: | Barberis, G.E.; Calvo, R.; Maldonado, H.G.; Zarate, C.E. |
| Filiación: | Departmento de Fisica, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, Argentina Carrera del Investigador Cientifico, Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina |
| Año: | 1975 |
| Volumen: | 12 |
| Número: | 3 |
| Página de inicio: | 853 |
| Página de fin: | 860 |
| DOI: | http://dx.doi.org/10.1103/PhysRevB.12.853 |
| Título revista: | Physical Review B |
| ISSN: | 01631829 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01631829_v12_n3_p853_Barberis |
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Citas:
---------- APA ----------
Barberis, G.E., Calvo, R., Maldonado, H.G. & Zarate, C.E. (1975) . EPR spectra and linewidths of Mn2+ in calcite. Physical Review B, 12(3), 853-860.http://dx.doi.org/10.1103/PhysRevB.12.853
---------- CHICAGO ----------
Barberis, G.E., Calvo, R., Maldonado, H.G., Zarate, C.E. "EPR spectra and linewidths of Mn2+ in calcite" . Physical Review B 12, no. 3 (1975) : 853-860.http://dx.doi.org/10.1103/PhysRevB.12.853
---------- MLA ----------
Barberis, G.E., Calvo, R., Maldonado, H.G., Zarate, C.E. "EPR spectra and linewidths of Mn2+ in calcite" . Physical Review B, vol. 12, no. 3, 1975, pp. 853-860.http://dx.doi.org/10.1103/PhysRevB.12.853
---------- VANCOUVER ----------
Barberis, G.E., Calvo, R., Maldonado, H.G., Zarate, C.E. EPR spectra and linewidths of Mn2+ in calcite. 1975;12(3):853-860.http://dx.doi.org/10.1103/PhysRevB.12.853
