Hyperfine interaction of Vk centres in Cs2NaYCl6 crystals
J. Barreto, J.L. Boldú, H. del Castillo and E. Muñoz
Instituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica, Ciudad Universitaria México, D.F. 04510. México.
Recibido el 28 de septiembre de 2010.
Aceptado el 10 de enero de 2012.
Abstract
In this work we present the results obtained through electron paramagnetic resonance (EPR) spectroscopy of the study of the hyperfine interaction of the Vk centres in the Cesium, sodium, yttrium hexachloride (Cs2NaYCl6) crystals. These electron defect centres are created by γ–irradiation at liquid nitrogen temperature of the Cs2NaYCl6 crystals. Our results are: g|| =2.008, g┴=2.023, A|| =91.21 (gauss) and A┴ =3.10 (gauss) and these results are compared with those obtained by Th. Pawlik and J.M. Spaeth [24] for the same system and those of D. Shoemaker [23] for sodium chloride.
Keywords: Elpasolites; crystal growth; colour centres; EPR.
Resumen
Presentamos los resultados obtenidos por medio de la espectroscopía de resonancia paramagnética electrónica (EPR) del estudio de la interacción hiperfina de centros Vk en los cristales de hexacloruro de cesio, sodio, itrio (Cs2NaYCl6). Éstos centros de defecto electrónico se crean por irradiación γ a temperatura de nitrógeno líquido en los cristales de Cs2NaYCl6. Nuestros resultados son: g|| =2.008, g┴ =2.023, A|| =91.21 (gauss) and A┴ =3.10 (gauss) y éstos resultados se comparan con los obtenidos por Th. Pawlik y J.M. Spaeth [24] para el mismo sistema y los de D. Shoemaker [23] para cloruro de sodio.
Descriptores: Elpasolitas; crecimiento de cristales; centros de color; EPR.
PACS: 75.10.Dq; 76.30.Mi; 61.80.Ed
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