Chemical pressure effects on magnetism in the quantum spin liquid candidates Yb2 X2 O7 (X = Sn, Ti, Ge)

Z. L. Dun, M. Lee, E. S. Choi, A. M. Hallas, C. R. Wiebe, J. S. Gardner, E. Arrighi, R. S. Freitas, A. M. Arevalo-Lopez, J. P. Attfield, H. D. Zhou, J. G. Cheng

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Abstract

The linear and nonlinear ac susceptibility measurements of Yb-pyrochlores, Yb2X2O7 (X=Sn, Ti, and Ge), show transitions with a ferromagnetic nature at 0.13 and 0.25 K for Yb2Sn2O7 and Yb2Ti2O7, respectively, and an antiferromagnetic ordering at 0.62 K for Yb2Ge2O7. These systematical results (i) provided information about the nature of the unconventional magnetic ground state in Yb2Ti2O7; (ii) realized a distinct antiferromagnetic ordering state in Yb2Ge2O7; and (iii) demonstrated that the application of chemical pressure through the series of Yb-pyrochlores can efficiently perturb the fragile quantum spin fluctuations of the Yb3+ ions and lead to very different magnetic ground states.
Original languageEnglish
Article number064401
JournalPhysical review B: Condensed matter and materials physics
Volume89
Issue number6
DOIs
Publication statusPublished - 4 Feb 2014

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