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Crystal Field Theory of Magnetic Behaviour of Er_{2}(SO_{4})_{3}·8H_{2}O

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Gupta R., Ghosh U., Basu C.

Acta Physica Polonica A

1996

vol. 89

issue 5-6

649-655

Using the most rigorous approach of direct diagonalization of the Hamiltonian matrix constructed in the complete basis states (364 in number) of the Er^{3+} ion the observed magnetic susceptibility and anisotropy data of erbium sulphate octahydrate were simulated and the set of crystal field parameters was evaluated. This procedure automatically includes the effect of intermediate coupling and the J-mixing under the crystal field. It was also demonstrated that such rigorous calculation using complete basis states is necessary in order to evaluate the correct set of parameters which may widely differ from the values obtained from approximate calculations previously performed using partial number of basis states of the ion concerned.

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1 Acta Physica Polonica A

1 1996

1 Basu C.

1 Ghosh U.

1 Gupta R.

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Crystal Field Theory of Magnetic Behaviour of Er_{2}(SO_{4})_{3}·8H_{2}O