Fermi surface properties of ferromagnetic CeRu2Ge2

Haruhisa Ikezawa; Haruyoshi Aoki; Masahiro Takashita; Christopher J. Haworth; Sinya Uji; Taichi Terashima; Kunihiko Maezawa; Rikio Settai; Yoshichika Onuki

doi:10.1016/S0921-4526(97)00102-6

Fermi surface properties of ferromagnetic CeRu₂Ge₂

Haruhisa Ikezawa, Haruyoshi Aoki, Masahiro Takashita, Christopher J. Haworth, Sinya Uji, Taichi Terashima, Kunihiko Maezawa, Rikio Settai, Yoshichika Onuki

Science

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

16 Citations (Scopus)

Abstract

We have performed a dHvA effect study on the ferromagnetic heavy fermion compound CeRu₂Ge₂. Six spin-split dHvA frequency branches are observed in the (100) and (110) planes. The angular dependence of the dHvA frequencies is mostly consistent with the result reported by King and Lonzarich (KL), except that we have successfully observed the dHvA signal from a large hole surface for fields parallel to [001] and a new low-frequency branch. The effective masses measured for fields in the (001) plane agree with those of KL and do not depend on field strength. On the other hand, those for fields parallel to [001] differ considerably from those of KL and are found to decrease with increasing field. Moreover, the measured effective mass of the large hole surface is less than half of the value expected from the electronic specific heat coefficient.

Original language	English
Pages (from-to)	210-211
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	237-238
DOIs	https://doi.org/10.1016/S0921-4526(97)00102-6
Publication status	Published - 1997 Jul

Keywords

CeRuGe
De Haas-van Alphen effect
Effective mass
Heavy fermions

ASJC Scopus subject areas

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

Access to Document

10.1016/S0921-4526(97)00102-6

Cite this

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title = "Fermi surface properties of ferromagnetic CeRu2Ge2",

abstract = "We have performed a dHvA effect study on the ferromagnetic heavy fermion compound CeRu2Ge2. Six spin-split dHvA frequency branches are observed in the (100) and (110) planes. The angular dependence of the dHvA frequencies is mostly consistent with the result reported by King and Lonzarich (KL), except that we have successfully observed the dHvA signal from a large hole surface for fields parallel to [001] and a new low-frequency branch. The effective masses measured for fields in the (001) plane agree with those of KL and do not depend on field strength. On the other hand, those for fields parallel to [001] differ considerably from those of KL and are found to decrease with increasing field. Moreover, the measured effective mass of the large hole surface is less than half of the value expected from the electronic specific heat coefficient.",

keywords = "CeRuGe, De Haas-van Alphen effect, Effective mass, Heavy fermions",

author = "Haruhisa Ikezawa and Haruyoshi Aoki and Masahiro Takashita and Haworth, {Christopher J.} and Sinya Uji and Taichi Terashima and Kunihiko Maezawa and Rikio Settai and Yoshichika Onuki",

year = "1997",

month = jul,

doi = "10.1016/S0921-4526(97)00102-6",

language = "English",

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journal = "Physica B: Condensed Matter",

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T1 - Fermi surface properties of ferromagnetic CeRu2Ge2

AU - Ikezawa, Haruhisa

AU - Aoki, Haruyoshi

AU - Takashita, Masahiro

AU - Haworth, Christopher J.

AU - Uji, Sinya

AU - Terashima, Taichi

AU - Maezawa, Kunihiko

AU - Settai, Rikio

AU - Onuki, Yoshichika

PY - 1997/7

Y1 - 1997/7

N2 - We have performed a dHvA effect study on the ferromagnetic heavy fermion compound CeRu2Ge2. Six spin-split dHvA frequency branches are observed in the (100) and (110) planes. The angular dependence of the dHvA frequencies is mostly consistent with the result reported by King and Lonzarich (KL), except that we have successfully observed the dHvA signal from a large hole surface for fields parallel to [001] and a new low-frequency branch. The effective masses measured for fields in the (001) plane agree with those of KL and do not depend on field strength. On the other hand, those for fields parallel to [001] differ considerably from those of KL and are found to decrease with increasing field. Moreover, the measured effective mass of the large hole surface is less than half of the value expected from the electronic specific heat coefficient.

AB - We have performed a dHvA effect study on the ferromagnetic heavy fermion compound CeRu2Ge2. Six spin-split dHvA frequency branches are observed in the (100) and (110) planes. The angular dependence of the dHvA frequencies is mostly consistent with the result reported by King and Lonzarich (KL), except that we have successfully observed the dHvA signal from a large hole surface for fields parallel to [001] and a new low-frequency branch. The effective masses measured for fields in the (001) plane agree with those of KL and do not depend on field strength. On the other hand, those for fields parallel to [001] differ considerably from those of KL and are found to decrease with increasing field. Moreover, the measured effective mass of the large hole surface is less than half of the value expected from the electronic specific heat coefficient.

KW - CeRuGe

KW - De Haas-van Alphen effect

KW - Effective mass

KW - Heavy fermions

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JO - Physica B: Condensed Matter

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