Realization of Quantum Dipoles in Triangular Lattice Crystal Ba3Yb(BO3)3

Abstract

We investigate the thermodynamic properties of the ytterbium-based triangular lattice compound Ba3Yb(BO3)3. The results demonstrate the absence of any long-range ordering down to 56 mK. Analysis of the magnetization, susceptibility and specific heat measurements suggests that Ba3Yb(BO3)3 may realize a S = 1/2 quantum dipole lattice, in which the dominant interaction is the long range dipole-dipole coupling on the geometrically frustrated triangular lattice, and exchange interactions are subdominant or negligible.

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• Rare-earth tuning of magnetic entropy and interaction scales in K${}_3$$Ln$(PO${}_4$)${}_2$ ($Ln$ = Yb, Gd) for adiabatic demagnetization refrigeration