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Dy2−x Y x Ti2O7: phonon vibration and magnetization with dilution

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Abstract

In this paper, the dilution effects of non-magnetic Y ions on spin-ice compound Dy2Ti2O7 by infrared and Raman spectra and magnetization measurements were investigated. An anomalous phonon softening with temperature decreasing is found in both the parent and diluted compounds, and Y doping can relax the softening of phonons except that of the IR mode near 233 cm−1, indicating a strong phonon–phonon coupling in the spin-ice material. The magnetization measurements reveal that the non-magnetic impurities do not severely influence the spin-ice rules in the ground state when the level of dilution is not very high. However, a large amount of dilution enhance the disorder and break the spin-ice state because the collective spin-flip clusters are no longer available.

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Acknowledgments

This work was financially supported by the State Key Project of Fundamental Research of China (Nos. 2010CB923403 and 2011CBA00111), the National Natural Science Foundation of China (Nos. 11174290 and U1232142), and the Hundred Talents Program of the Chinese Academy of Sciences (No. 2010A1175).

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Authors and Affiliations

  1. High Magnetic Field Laboratory, Chinese Academy of Sciences and University of Science and Technology of China, Hefei, 230031, China

    Hui Liu, You-Ming Zou, Shi-Le Zhang, Ran-Ran Zhang, Chang-Jin Zhang & Yu-Heng Zhang

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  1. Hui Liu
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  2. You-Ming Zou
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  3. Shi-Le Zhang
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Correspondence to Chang-Jin Zhang.

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Liu, H., Zou, YM., Zhang, SL. et al. Dy2−x Y x Ti2O7: phonon vibration and magnetization with dilution. Rare Met. 34, 81–88 (2015). https://doi.org/10.1007/s12598-013-0178-y

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  • DOI: https://doi.org/10.1007/s12598-013-0178-y

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