Study of the ground state properties of $LiH{o}_x{Y}_{1-x}{F}_4$ using $\mu$SR

Abstract

$LiH{o}_x{Y}_{1-x}{F}_4$ is an insulating system where the magnetic Ho${}^{3+}$ ions have an Ising character, and interact mainly through magnetic dipolar fields. We used the muon spin relaxation technique to study the nature of the ground state for samples with x=0.25, 0.12, 0.08, 0.045 and 0.018. In contrast with some previous works, we have not found any signature of canonical spin glass behavior down to $\approx$15mK. Instead, below $\approx$300mK we observed dynamic magnetism characterized by a single correlation time with a temperature independent fluctuation rate. We observed that this low temperature fluctuation rate increases with x up to 0.08, above which it levels off. The 300mK energy scale corresponds to the Ho3+ hyperfine interaction strength, suggesting that the hyperfine interaction may be intimately involved with the spin dynamics in this system.

References in corpus (14)

• Induced Random Fields in the LiHo${}_x$Y${}_{1-x}$F${}_4$ Quantum Ising Magnet in a Transverse Magnetic Field
• Quantum and Classical Glass Transitions in $LiH{o}_x{Y}_{1-x}{F}_4$
• Observation of Spin Glass Dynamics in Dilute LiHo${}_x$Y${}_{1-x}$F${}_4$
• Significance of the Hyperfine Interactions in the Phase Diagram of $\mathrm{LiH}{\mathrm{o}}_{\mathrm{x}}{\mathrm{Y}}_{1-\mathrm{x}}{\mathrm{F}}_4$
• Quantum spin glass and the dipolar interaction
• The low-$T$ phase diagram of $\mathrm{LiH}{\mathrm{o}}_{\mathrm{x}}{\mathrm{Y}}_{1-\mathrm{x}}{\mathrm{F}}_4$
• Absence of Conventional Spin-Glass Transition in the Ising Dipolar System LiHo_xY_{1-x}F_4
• Spin Glass Transition at Nonzero Temperature in a Disordered Dipolar Ising System: The Case of LiHoxY{1-x}F4
• Phase diagram of the dilute magnet LiHo_xY_{1-x}F_4
• Monte Carlo study of the spin-glass phase of the site-diluted dipolar Ising model
• Absence of Dipole Glass Transition for Randomly Dilute Classical Ising Dipoles
• Specific Heat of the Dilute Ising Magnet LiHo${}_x$Y${}_{1-x}$F${}_4$
• Low-temperature properties of the dilute dipolar magnet LiHo_xY_(1-x)F_4
• Muon spin rotation studies of spin dynamics at avoided level crossings in LiY0.998Ho0.002F4

Cited by in corpus (8)

• Experimental Phase Diagram and Dynamics of a Dilute Dipolar-Coupled Ising System
• Controllable quantum spin glasses with magnetic impurities embedded in quantum solids
• Evolution of spin relaxation processes in LiY${}_{1-x}$Ho${}_x$F${}_4$ with increasing x studied via AC-susceptibility and muon spin relaxation
• $\mu$SR study of spin freezing and persistent spin dynamics in NaCaNi${}_2$F${}_7$
• A strongly interacting, two-dimensional, dipolar spin ensemble in (111)-oriented diamond
• Dynamical Quantum Phase Transitions in presence of a spin bath
• μSR Study of Spin Dynamics in LiY${}_{1-x}$Ho${}_x$F${}_4$
• Thermodynamics of a Quantum Ising system coupled to a spin bath: Zero Temperature Results