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Dilution effects in Ho2-xYxSn2O7: from the spin ice to the single-ion magnet

Prando, G., Carretta, P., Giblin, Sean ORCID:, Lago, J., Pin, S. and Ghigna, P. 2009. Dilution effects in Ho2-xYxSn2O7: from the spin ice to the single-ion magnet. Journal of Physics Conference Series: Highly Frustrated Magnetism 2008 (HFM 2008) 145 (1) , 012033. 10.1088/1742-6596/145/1/012033

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A study of the modifications of the magnetic properties of Ho2-YxSn2O7 upon varying the concentration of diamagnetic Y3+ ions is presented. Magnetization and specific heat measurements show that the Spin Ice ground-state is only weakly affected by doping for x ≤ 0.3, even if non-negligible changes in the crystal field at Ho3+ occur. In this low doping range μSR relaxation measurements evidence a modification in the low-temperature dynamics with respect to the one observed in the pure Spin Ice. For x → 2, or at high temperature, the dynamics involve fluctuations among Ho3+ crystal field levels which give rise to a characteristic peak in 119Sn nuclear spin-lattice relaxation rate. In this doping limit also the changes in Ho3+magnetic moment suggest a variation of the crystal field parameters.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: IOP Publishing
Last Modified: 21 Oct 2022 10:50

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