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Metamagnetic Transition in Heavy Fermion Superconductor UTe2
We studied the magnetization of the recently discovered heavy fermion superconductor UTe2 up to 56 T in pulsed-magnetic fields. A first-order metamagnetic transition was clearly observed at Hm = 34.9 T, when a magnetic field H was applied along the orthorhombic hard-magnetization b-axis. The transit...
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Published in: | Journal of the Physical Society of Japan 2019-06, Vol.88 (6), p.063706 |
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container_start_page | 063706 |
container_title | Journal of the Physical Society of Japan |
container_volume | 88 |
creator | Miyake, Atsushi Shimizu, Yusei Sato, Yoshiki J Li, Dexin Nakamura, Ai Homma, Yoshiya Honda, Fuminori Flouquet, Jacques Tokunaga, Masashi Aoki, Dai |
description | We studied the magnetization of the recently discovered heavy fermion superconductor UTe2 up to 56 T in pulsed-magnetic fields. A first-order metamagnetic transition was clearly observed at Hm = 34.9 T, when a magnetic field H was applied along the orthorhombic hard-magnetization b-axis. The transition has a critical end point at ∼11 K and 34.7 T, where the first order transition terminates and changes into a crossover regime. Using the thermodynamic Maxwell relation, we evaluated the field dependence of the Sommerfeld coefficient of specific heat, which is directly related to the superconducting pairing. From the analysis, we found a significant enhancement of the effective mass centered at Hm, which is reminiscent of the field-reentrant superconductivity of the ferromagnet URhGe in transverse fields. We discuss the origin of their field-robust superconductivity. |
doi_str_mv | 10.7566/JPSJ.88.063706 |
format | article |
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A first-order metamagnetic transition was clearly observed at Hm = 34.9 T, when a magnetic field H was applied along the orthorhombic hard-magnetization b-axis. The transition has a critical end point at ∼11 K and 34.7 T, where the first order transition terminates and changes into a crossover regime. Using the thermodynamic Maxwell relation, we evaluated the field dependence of the Sommerfeld coefficient of specific heat, which is directly related to the superconducting pairing. From the analysis, we found a significant enhancement of the effective mass centered at Hm, which is reminiscent of the field-reentrant superconductivity of the ferromagnet URhGe in transverse fields. 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source | American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list) |
subjects | Crossovers Dependence Fermions Ferromagnetism Heavy fermion superconductors Magnetic fields Magnetism Magnetization Superconductivity |
title | Metamagnetic Transition in Heavy Fermion Superconductor UTe2 |
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