De Haas-van Alphen effect in NpCoGa5

Dai Aoki; Yoshiya Homma; Yoshinobu Shiokawa; Etsuji Yamamoto; Akio Nakamura; Yoshinori Haga; Rikio Settai; Yoshichika Onuki

doi:10.1016/j.physb.2005.01.293

De Haas-van Alphen effect in NpCoGa₅

Dai Aoki, Yoshiya Homma, Yoshinobu Shiokawa, Etsuji Yamamoto, Akio Nakamura, Yoshinori Haga, Rikio Settai, Yoshichika Onuki

Materials Processing and Characterization Division

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

2 Citations (Scopus)

Abstract

We grew high-quality single crystals of NpCoGa5 and succeeded in observing the de Haas-van Alphen effect. The metamagnetic transition, where the antiferromagnetic state changes into the paramagnetic (field-induced ferromagnetic) state, was observed at Hm=43kOe for H∥[001]. On increasing the field angle θ, Hm follows the 1/cosθ dependence, indicating an Ising-type antiferromagnet. The main Fermi surface in NpCoGa5 consists of two kinds of cylindrical ones. The detected cyclotron effective mass is considerably large, ranging from 3.2 to 11.5m0 in the paramagnetic state. NpCoGa5 is a heavy-fermion compound and the 5f electrons significantly contribute to the conduction bands.

Original language	English
Pages (from-to)	1084-1086
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	359-361
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2005.01.293
Publication status	Published - 2005 Apr 30

Keywords

De Haas-van Alphen effect
Fermi surface
NpCoGa

ASJC Scopus subject areas

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

Access to Document

10.1016/j.physb.2005.01.293

Cite this

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title = "De Haas-van Alphen effect in NpCoGa5",

abstract = "We grew high-quality single crystals of NpCoGa5 and succeeded in observing the de Haas-van Alphen effect. The metamagnetic transition, where the antiferromagnetic state changes into the paramagnetic (field-induced ferromagnetic) state, was observed at Hm=43kOe for H∥[001]. On increasing the field angle θ, Hm follows the 1/cosθ dependence, indicating an Ising-type antiferromagnet. The main Fermi surface in NpCoGa5 consists of two kinds of cylindrical ones. The detected cyclotron effective mass is considerably large, ranging from 3.2 to 11.5m0 in the paramagnetic state. NpCoGa5 is a heavy-fermion compound and the 5f electrons significantly contribute to the conduction bands.",

keywords = "De Haas-van Alphen effect, Fermi surface, NpCoGa",

author = "Dai Aoki and Yoshiya Homma and Yoshinobu Shiokawa and Etsuji Yamamoto and Akio Nakamura and Yoshinori Haga and Rikio Settai and Yoshichika Onuki",

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T1 - De Haas-van Alphen effect in NpCoGa5

AU - Aoki, Dai

AU - Homma, Yoshiya

AU - Shiokawa, Yoshinobu

AU - Yamamoto, Etsuji

AU - Nakamura, Akio

AU - Haga, Yoshinori

AU - Settai, Rikio

AU - Onuki, Yoshichika

PY - 2005/4/30

Y1 - 2005/4/30

N2 - We grew high-quality single crystals of NpCoGa5 and succeeded in observing the de Haas-van Alphen effect. The metamagnetic transition, where the antiferromagnetic state changes into the paramagnetic (field-induced ferromagnetic) state, was observed at Hm=43kOe for H∥[001]. On increasing the field angle θ, Hm follows the 1/cosθ dependence, indicating an Ising-type antiferromagnet. The main Fermi surface in NpCoGa5 consists of two kinds of cylindrical ones. The detected cyclotron effective mass is considerably large, ranging from 3.2 to 11.5m0 in the paramagnetic state. NpCoGa5 is a heavy-fermion compound and the 5f electrons significantly contribute to the conduction bands.

AB - We grew high-quality single crystals of NpCoGa5 and succeeded in observing the de Haas-van Alphen effect. The metamagnetic transition, where the antiferromagnetic state changes into the paramagnetic (field-induced ferromagnetic) state, was observed at Hm=43kOe for H∥[001]. On increasing the field angle θ, Hm follows the 1/cosθ dependence, indicating an Ising-type antiferromagnet. The main Fermi surface in NpCoGa5 consists of two kinds of cylindrical ones. The detected cyclotron effective mass is considerably large, ranging from 3.2 to 11.5m0 in the paramagnetic state. NpCoGa5 is a heavy-fermion compound and the 5f electrons significantly contribute to the conduction bands.

KW - De Haas-van Alphen effect

KW - Fermi surface

KW - NpCoGa

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