De haas-van alphen effect studies on the ferromagnetic superconductor UGe2 under high pressure

Taichi Terashima; Takehiko Matsumoto; Chieko Terakura; Shinya Uji; Noriaki Kimura; Motoki Endo; Takemi Komatsubara; Haruyoshi Aoki; Kunihiko Maezawa

doi:10.1143/jpsjs.71s.29

De haas-van alphen effect studies on the ferromagnetic superconductor UGe₂ under high pressure

Taichi Terashima, Takehiko Matsumoto, Chieko Terakura, Shinya Uji, Noriaki Kimura, Motoki Endo, Takemi Komatsubara, Haruyoshi Aoki, Kunihiko Maezawa

SCI - Physics

Research output: Contribution to journal › Article › peer-review

Abstract

We have developed a clamped piston-cylinder high-pressure cell using NiCrAl alloy and have performed de Haas-van Alphen effect measurements on UGe ₂ under hydrostatic pressures up to 17.6 kbar, which exceeds the critical pressure P_c where the Curie temperature T_c vanishes. We have found that a discontinuous change of the Fermi surface occurs across P_c. Quasiparticle effective masses are substantially enhanced near 13 kbar, where the T_x anomaly, which occurs below T_c in the ferromagnetic phase, is suppressed. Heavy masses (∼40 me) are observed near P_c on both the ferromagnetic and paramagnetic sides.

Original language	English
Pages (from-to)	29-32
Number of pages	4
Journal	journal of the physical society of japan
Volume	71
Issue number	SUPPL.
DOIs	https://doi.org/10.1143/jpsjs.71s.29
Publication status	Published - 2002

Keywords

De haas-van alphen effect
Fermi surface
High pressure
UGe

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/jpsjs.71s.29

Cite this

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title = "De haas-van alphen effect studies on the ferromagnetic superconductor UGe2 under high pressure",

abstract = "We have developed a clamped piston-cylinder high-pressure cell using NiCrAl alloy and have performed de Haas-van Alphen effect measurements on UGe 2 under hydrostatic pressures up to 17.6 kbar, which exceeds the critical pressure Pc where the Curie temperature Tc vanishes. We have found that a discontinuous change of the Fermi surface occurs across Pc. Quasiparticle effective masses are substantially enhanced near 13 kbar, where the Tx anomaly, which occurs below Tc in the ferromagnetic phase, is suppressed. Heavy masses (∼40 me) are observed near Pc on both the ferromagnetic and paramagnetic sides.",

keywords = "De haas-van alphen effect, Fermi surface, High pressure, UGe",

author = "Taichi Terashima and Takehiko Matsumoto and Chieko Terakura and Shinya Uji and Noriaki Kimura and Motoki Endo and Takemi Komatsubara and Haruyoshi Aoki and Kunihiko Maezawa",

year = "2002",

doi = "10.1143/jpsjs.71s.29",

language = "English",

volume = "71",

pages = "29--32",

journal = "Journal of the Physical Society of Japan",

issn = "0031-9015",

publisher = "Physical Society of Japan",

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TY - JOUR

T1 - De haas-van alphen effect studies on the ferromagnetic superconductor UGe2 under high pressure

AU - Terashima, Taichi

AU - Matsumoto, Takehiko

AU - Terakura, Chieko

AU - Uji, Shinya

AU - Kimura, Noriaki

AU - Endo, Motoki

AU - Komatsubara, Takemi

AU - Aoki, Haruyoshi

AU - Maezawa, Kunihiko

PY - 2002

Y1 - 2002

N2 - We have developed a clamped piston-cylinder high-pressure cell using NiCrAl alloy and have performed de Haas-van Alphen effect measurements on UGe 2 under hydrostatic pressures up to 17.6 kbar, which exceeds the critical pressure Pc where the Curie temperature Tc vanishes. We have found that a discontinuous change of the Fermi surface occurs across Pc. Quasiparticle effective masses are substantially enhanced near 13 kbar, where the Tx anomaly, which occurs below Tc in the ferromagnetic phase, is suppressed. Heavy masses (∼40 me) are observed near Pc on both the ferromagnetic and paramagnetic sides.

AB - We have developed a clamped piston-cylinder high-pressure cell using NiCrAl alloy and have performed de Haas-van Alphen effect measurements on UGe 2 under hydrostatic pressures up to 17.6 kbar, which exceeds the critical pressure Pc where the Curie temperature Tc vanishes. We have found that a discontinuous change of the Fermi surface occurs across Pc. Quasiparticle effective masses are substantially enhanced near 13 kbar, where the Tx anomaly, which occurs below Tc in the ferromagnetic phase, is suppressed. Heavy masses (∼40 me) are observed near Pc on both the ferromagnetic and paramagnetic sides.

KW - De haas-van alphen effect

KW - Fermi surface

KW - High pressure

KW - UGe

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