Magnetovolume Effect on the First-Order Metamagnetic Transition in UTe${}_2$

Abstract

The link between the metamagnetic transition and novel spin-triplet superconductivity of UTe${}_2$ was discussed thermodynamically through magnetostriction measurements in a pulsed-magnetic field. We revealed a discontinuous magnetostriction across the metamagnetic transition at ${\mu }_0{H}_{\mathrm{m}}\approx 35$~T for the applied magnetic fields along the crystallographic $b$ axis in the orthorhombic structure. The resultanting volume magnetostriction of $\Delta V/V\approx -5.9\times 10^{-4}$ gives the initial pressure dependence of $H_{\mathrm{m}}$ by employing the Clausius-Clapeyron's equation, which agrees with previous pressure experiments. Further, significant anisotropic magnetostriction (AMS), derived by subtracting the averaged linear magnetostriction, was revealed. Contrary to the weakly field-dependent AMS along the $a$ axis, those along the $b$ and $c$ axes show strong field dependences with a similar magnitude but with opposite signs, indicating its lattice instability. The relationship between characteristic energy scales of magnetic fields and temperatures was discussed in terms of the Grüneisen parameters compared to the other $f$-electron systems. The volume shrinkage in UTe${}_2$ at $H_{\mathrm{m}}$, contrary to the volume expansion in typical heavy fermion metamagnets, pushes to invoke the link with the valence instability related to the itinerant-localized dual nature of the U magnetism.

6 pages, 5 figures, including supplemental material. To be published in Journal of Physical Society of Japan

References in corpus (22)

• Unconventional Superconductivity in Heavy Fermion UTe2
• Review of U-based Ferromagnetic Superconductors: Comparison between UGe2, URhGe, and UCoGe
• Unconventional Superconductivity in UTe2
• Metamagnetic Transition in Heavy Fermion Superconductor UTe2
• Multiple Superconducting Phases and Unusual Enhancement of the Upper Critical Field in UTe2
• Low energy band structure and symmetries of UTe2 from angle resolved photoemission spectroscopy
• 125Te-NMR Study on a Single Crystal of Heavy Fermion Superconductor UTe2
• Low-dimensional antiferromagnetic fluctuations in the heavy-fermion paramagnetic ladder UTe${}_2$
• Magnetic-Field-Induced Phenomena in the Paramagnetic Superconductor UTe${}_2$
• Magnetic-Field Control of Quantum Critical Points of Valence Transition
• Heavy fermions in high magnetic field
• Spatially inhomogeneous superconductivity in UTe2
• Valence Fluctuations Revealed by Magnetic Field Scan: Comparison with Experiments in YbXCu_4 (X=In, Ag, Cd) and CeYIn_5 (Y=Ir, Rh)
• Thermodynamic Investigation of Metamagnetism in Pulsed High Magnetic Fields on Heavy Fermion Superconductor UTe${}_2$
• Magnetic Properties under Pressure in Novel Spin-Triplet Superconductor UTe2
• Field-Induced Superconductivity near the Superconducting Critical Pressure in UTe2
• Dimensionality driven enhancement of ferromagnetic superconductivity in URhGe
• Slow Electronic Dynamics in the Paramagnetic State of UTe${}_2$
• Enhancement and Discontinuity of Effective Mass through the First-Order Metamagnetic Transition in UTe${}_2$
• Core-Level Photoelectron Spectroscopy Study of UTe${}_2$
• Thermodynamic signatures of short-range magnetic correlations in UTe${}_2$
• On Sharp Enhancement of Effective Mass of Quasiparticles and Coefficient of T^{2} Term of Resistivity around First-Order Metamagnetic Transition Observed in UTe_{2}

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• First Observation of de Haas-van Alphen Effect and Fermi Surfaces in Unconventional Superconductor UTe2
• Field-induced tuning of the pairing state in a superconductor
• A review of UTe${}_2$ at high magnetic fields
• Rhombic skyrmion lattice coupled with orthorhombic structural distortion in EuAl${}_4$
• c axis electrical transport at the metamagnetic transition in the heavy-fermion superconductor UTe2 under pressure
• A quantum critical line bounds the high field metamagnetic transition surface in UTe${}_2$
• A review on magnetic field induced spin crossover in LaCoO${}_3$ up to 600 T
• Emergence of Elastic Softening Featuring Ultra-Slow Dynamics Around Magnetic Critical Endpoint in UCoAl
• Dramatic elastic response at the critical end point in UTe${}_2$
• Crystal-field magnetostriction of the spin ice under ultrahigh magnetic fields
• Slow magnetic quantum oscillations in the c-axis magnetoresistance of UTe${}_2$