Studies by electron paramagnetic resonance of K- and Na-bromides doped with Eu2+
Por:
Aguilar S.G., Murrieta S.H., Rubio O.J., Muñoz P.E.
Publicada:
1 ene 1975
Resumen:
The electron paramagnetic resonance of Eu2+ in orthorhombic sites of NaBr and KBr has been observed at 1.2 and 300 K using an X-band spectrometer. The spin-Hamiltonian parameters for Eu2+ ions in NaBr have been determined for the first time. Some disagreement between the results obtained at room temperature and those reported recently by other workers for the KBr host is noted. Absolute signs of the spin-Hamiltonian parameters were determined from the relative intensities of the resonance lines at liquid helium temperatures. In both studies the sign of the b2 0 term was found to be positive, and is therefore in agreement with the sign reported by Nair et al. for Eu2+ in KCl and by Aguilar et al. for Eu 2+ in NaCl. The behavior of the second-order spin-Hamiltonian paramerer b2 0 as a function of the lattice size is discussed. Copyright © 1975 American Institute of Physics.
Filiaciones:
Instituto de Física, UNAM, México 20, D. F
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