Abstract
The study explores the spin-quadrupole-strain coupling and the magnetic Grquotuneisen parameter in the spin-nematic phase of LiCuVO${}_{4}$ by the ultrasound and magnetocaloric experiments in high magnetic fields. The paper shows a strong involvement of a crystal lattice observed as anomalies in the acoustic properties and a divergence of the Grquotuneisen parameter at the transition to the spin-nematic state.
Highlights
Spin-nematic phases in which the spin-rotational symmetry is broken whereas translational and time-reversal symmetry are preserved constitute the magnetic analog of nematic liquid crystals [1]
We report on the magnetocaloric effect and ultrasound studies of the frustrated quasi-one-dimensional spin-1/2 compound LiCuVO4, evidencing a spin-nematic state
In this paper we report on an investigation of the spinnematic state in LiCuVO4 by the pulsed high-field magnetocaloric effect (MCE) and ultrasound measurements
Summary
Spin-nematic phases in which the spin-rotational symmetry is broken whereas translational and time-reversal symmetry are preserved constitute the magnetic analog of nematic liquid crystals [1]. High-field magnetization and 51V nuclear magnetic resonance results obtained just below the spin-saturated state have recently been reported as evidence for a spin-nematic phase in LiCuVO4 [16,17]. From the currently available high-field magnetization results the spin-nematic phase in LiCuVO4 has been suggested to exist from μ0Hc3 of about 40 T for H c and 47 T for H a or b to the saturation field μ0Hsat ≈ 44.5 and 52 T, respectively, for the H c and H a or b directions [16,18]. In this paper we report on an investigation of the spinnematic state in LiCuVO4 by the pulsed high-field magnetocaloric effect (MCE) and ultrasound measurements. The ultrasound attenuation results show contributions from the spin-quadrupolar and spin-dipolar degrees of freedom in the spin-nematic state of LiCuVO4
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