SPECTROSCOPIC INVESTIGATIONS OF THE ANTIFERROMAGNETICALLY ORDERED $TbPO_{4}$
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Date
1974
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Ohio State University
Abstract
The optical absorption and fluorescence spectra of the paramagnetic rare-earth ion $Tb^{3+}$ in $TbPo_{4}$, were recorded. The spectra show that this ionic insulator orders antiferromagnetically below $T_{N} = 2.2$K. The parameters of the crystal-field Hamiltonian for the $Tb^{3+}$ in $TbPO_{4}$ could be determined. With these parameters a classical expression was derived for the electrical crystal-field energy as a function of the orientation ($\theta, \varphi$) of the magnetic moments in the magnetically ordered state.
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Author Institution: Department of Chemistry, Carleton University