An EPR study of Ni+ centers in SrF2:Ni and BaF2:Ni |
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| Authors: | P J Alonso J Casas-Gonzalez R Alcal H W Den Hartog |
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| Institution: | 1. Dpto. Física Fundamental, Fac. Ciencias , Zaragoza , Spain;2. Solid State Physics Lab. , Melkweg , 1 , Groningen , The Netherlands |
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| Abstract: | An EPR study of RT X-irradiated SrF2:Ni and BaF2:Ni has been performed. Different kinds of Ni+ centers showing small deviations with respect to a basic structure have been observed. This basic structure consists of a Ni+ ion displaced along a <100> direction from the cation substitutional position toward the center of a face of the cube of fluorines. These results are similar to those previously reported on CaF2:Ni. The spin Hamiltonian parameters of the different centers obtained from the analysis of the corresponding rotational diagrams are also reported. |
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| Keywords: | Diamond Positron annihilation Defect profile Residual stress X-ray diffraction |
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