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Magnetic properties of ErIG and approximation of isotropic exchange

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Czechoslovak Journal of Physics B Aims and scope

Abstract

A one-ion model calculation which considers the Er3+ ion subject to the crystal field, the isotropic exchange field and the applied magnetic field is compared with the following experimental data: the easy axis direction, the transition temperature, the temperature and field dependence of the magnetization, the compensation temperature, the magnetocrystalline anisotropy and the umbrella structure of Er3+ magnetic moments in ErIG. The crystal field parameters in Y(Er)GG and ErGG are discussed and determined first. The same parameters are used for ErIG, only those of second order are allowed to vary. In spite of the isotropic exchange approximation, the experiments (except the controversial umbrella structure and anisotropy data) are well reproduced within the framework of this model. Further improvements are expected by inclusion of the anisotropy of the exchange interaction.

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Authors and Affiliations

  1. Institute of Physics, Czechosl. Acad. Sci., Na Slovance 2, 180 40, Praha 8, Czechoslovakia

    I. Veltruský

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  1. I. Veltruský
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Dedicated to Dr. Svatopluk Krupička on the occasion of his 65th birthday.

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Veltruský, I. Magnetic properties of ErIG and approximation of isotropic exchange. Czech J Phys 37, 30–41 (1987). https://doi.org/10.1007/BF01597875

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  • DOI: https://doi.org/10.1007/BF01597875

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