Evidence for the microscopic coexistence of superconductivity and ferromagnetism in UGe2:73Ge-NMR/NQR study

A. Harada; H. Kotegawa; Y. Kawasaki; G. Q. Zheng; Y. Kitaoka; E. Yamamoto; Y. Haga; Y. Onuki; K. Itoh; E. E. Haller

doi:10.1016/j.physb.2005.01.283

Evidence for the microscopic coexistence of superconductivity and ferromagnetism in UGe₂:⁷³Ge-NMR/NQR study

A. Harada, H. Kotegawa, Y. Kawasaki, G. Q. Zheng, Y. Kitaoka, E. Yamamoto, Y. Haga, Y. Onuki, K. Itoh, E. E. Haller

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

1 Citation (Scopus)

Abstract

We report on the pressure-induced novel phases of ferromagnetism and superconductivity (SC) in the itinerant ferromagnet UGe2 via the ⁷³Ge-NQR measurements under pressure (P). The NQR spectrum has revealed that the ferromagnetic phases are separated into weakly and strongly polarized phases around a critical value of Pc*∼1.2GPa, pointing to a first-order transition around Pc*. Here we present further evidence for the phase separation into ferromagnetic and paramagnetic phases around a critical pressure Pc∼1.6GPa. The measurements of nuclear spin-lattice relaxation rate 1/T1 have probed that SC sets only in the ferromagnetic phase at Tsc∼0.2K, but it does not in the paramagnetic phase.

Original language	English
Pages (from-to)	1057-1059
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	359-361
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2005.01.283
Publication status	Published - Apr 30 2005
Externally published	Yes

Keywords

Ferromagnetism
NMR/NQR
Superconductivity
UGe

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/j.physb.2005.01.283

Cite this

@article{81a5432d05a24281bcd7ca3649aeb2a6,

title = "Evidence for the microscopic coexistence of superconductivity and ferromagnetism in UGe2:73Ge-NMR/NQR study",

abstract = "We report on the pressure-induced novel phases of ferromagnetism and superconductivity (SC) in the itinerant ferromagnet UGe2 via the 73Ge-NQR measurements under pressure (P). The NQR spectrum has revealed that the ferromagnetic phases are separated into weakly and strongly polarized phases around a critical value of Pc*∼1.2GPa, pointing to a first-order transition around Pc*. Here we present further evidence for the phase separation into ferromagnetic and paramagnetic phases around a critical pressure Pc∼1.6GPa. The measurements of nuclear spin-lattice relaxation rate 1/T1 have probed that SC sets only in the ferromagnetic phase at Tsc∼0.2K, but it does not in the paramagnetic phase.",

keywords = "Ferromagnetism, NMR/NQR, Superconductivity, UGe",

author = "A. Harada and H. Kotegawa and Y. Kawasaki and Zheng, {G. Q.} and Y. Kitaoka and E. Yamamoto and Y. Haga and Y. Onuki and K. Itoh and Haller, {E. E.}",

note = "Funding Information: This work was supported by a Grant-in-Aid for Creative Scientific Research (15GS0123), MEXT and The 21st Century COE Program supported by the Japan Society for the Promotion of Science. ",

year = "2005",

month = apr,

day = "30",

doi = "10.1016/j.physb.2005.01.283",

language = "English",

volume = "359-361",

pages = "1057--1059",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

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TY - JOUR

T1 - Evidence for the microscopic coexistence of superconductivity and ferromagnetism in UGe2:73Ge-NMR/NQR study

AU - Harada, A.

AU - Kotegawa, H.

AU - Kawasaki, Y.

AU - Zheng, G. Q.

AU - Kitaoka, Y.

AU - Yamamoto, E.

AU - Haga, Y.

AU - Onuki, Y.

AU - Itoh, K.

AU - Haller, E. E.

N1 - Funding Information: This work was supported by a Grant-in-Aid for Creative Scientific Research (15GS0123), MEXT and The 21st Century COE Program supported by the Japan Society for the Promotion of Science.

PY - 2005/4/30

Y1 - 2005/4/30

N2 - We report on the pressure-induced novel phases of ferromagnetism and superconductivity (SC) in the itinerant ferromagnet UGe2 via the 73Ge-NQR measurements under pressure (P). The NQR spectrum has revealed that the ferromagnetic phases are separated into weakly and strongly polarized phases around a critical value of Pc*∼1.2GPa, pointing to a first-order transition around Pc*. Here we present further evidence for the phase separation into ferromagnetic and paramagnetic phases around a critical pressure Pc∼1.6GPa. The measurements of nuclear spin-lattice relaxation rate 1/T1 have probed that SC sets only in the ferromagnetic phase at Tsc∼0.2K, but it does not in the paramagnetic phase.

AB - We report on the pressure-induced novel phases of ferromagnetism and superconductivity (SC) in the itinerant ferromagnet UGe2 via the 73Ge-NQR measurements under pressure (P). The NQR spectrum has revealed that the ferromagnetic phases are separated into weakly and strongly polarized phases around a critical value of Pc*∼1.2GPa, pointing to a first-order transition around Pc*. Here we present further evidence for the phase separation into ferromagnetic and paramagnetic phases around a critical pressure Pc∼1.6GPa. The measurements of nuclear spin-lattice relaxation rate 1/T1 have probed that SC sets only in the ferromagnetic phase at Tsc∼0.2K, but it does not in the paramagnetic phase.

KW - Ferromagnetism

KW - NMR/NQR

KW - Superconductivity

KW - UGe

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JO - Physica B: Condensed Matter

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