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High-Field Multi-Frequency ESR in the Rare-Earth Spinel Compound CdYb2S4

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Abstract

We have performed electron spin resonance (ESR) measurements in the low temperature magnetic-ordered state of polycrystalline samples of CdYb2S4. This material is one of the rare-earth spinel compounds in which Yb3+ ions form the pyrochlore lattice, and consequently, CdYb2S4 possesses anomalous properties caused by geometrical frustration and anisotropic terms. Some ESR signals have been detected, and their resonance fields are well-fitted by linear lines in the frequency vs. magnetic-field plane. One of the ESR modes appears to intersect the origin of this plane, suggesting a nearly gapless feature in the magnetically ordered state of this material. Two additional ESR modes appear above H c = 2.6 T, indicating that there is a field-induced phase transition at H c. Given the nearly gapless feature of CdYb2S4, we expect that the ground state of CdYb2S4 must be either the Palmer–Chalker state or the ψ 2 state.

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Acknowledgments

We thank Kalro Penc, Collin Broholm, Oleg Tchernyshyov, and Kenta Kimura for fruitful discussions. This work was partially supported by Grants-in-Aid (No. 25707030) from JSPS, and by PRESTO, JST, Japan.

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Correspondence to M. Hagiwara.

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Yoshizawa, D., Kida, T., Nakatsuji, S. et al. High-Field Multi-Frequency ESR in the Rare-Earth Spinel Compound CdYb2S4 . Appl Magn Reson 46, 993–996 (2015). https://doi.org/10.1007/s00723-015-0651-x

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  • DOI: https://doi.org/10.1007/s00723-015-0651-x

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