Composition effect of kondo behavior in aualce quasicrystalline approximants

Yuji Muro; Tadashi Fukuhara; Takahiro Namiki; Tomohiko Kuwai; Akira Sakurai; Asuka Ishikawa; Shintaro Suzuki; Ryuji Tamura

doi:10.2320/matertrans.MT-MB2020008

Composition effect of kondo behavior in aualce quasicrystalline approximants

Yuji Muro^*, Tadashi Fukuhara, Takahiro Namiki, Tomohiko Kuwai, Akira Sakurai, Asuka Ishikawa, Shintaro Suzuki, Ryuji Tamura

^*Corresponding author for this work

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

3 Scopus citations

Abstract

We have studied the magnetic and transport properties of Tsai-type quasicrystalline approximants, Au_xAl₈₄¹_xCe₁₆ and Au_yAl₈₆¹_yCe₁₄ by the measurements of magnetic susceptibility», specific heat C_p and electrical resistivity µ. A Curie-Weiss behavior in» for all compounds indicates the stable trivalent state of Ce ions in AuAlCe. The effective magnetic moment increases with increasing the Au concentration whereas the Weiss temperature decreases. These behaviors suggest the Kondo effect in AuAlCe suppresses with the increase of Au concentration. In C_p, all measured compounds show a broad peak due to the Kondo resonance at 0.8 K. In addition, C_p/T shows a peak below 0.6 K, which implies the existence of spin-glass transition. In all compounds, a pronounced ¹log T behavior due to Kondo effect are observed in µ(T) below 10 K. Moreover, Au_yAl₈₆¹_yCe₁₄ approximants are the first example displaying a precursor of coherent Kondo state at low temperatures because a broad maximum is observed in µ(T) at 1.3 K.

Original language	English
Pages (from-to)	321-324
Number of pages	4
Journal	Materials Transactions
Volume	62
Issue number	3
DOIs	https://doi.org/10.2320/matertrans.MT-MB2020008
State	Published - 2021/03/01

Keywords

AuAlCe
Coherent kondo state
Electrical resistivity
Kondo effect
Magnetic susceptibility
Quasicrystal approximants
Specific heat
Spin-glass

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.2320/matertrans.MT-MB2020008

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title = "Composition effect of kondo behavior in aualce quasicrystalline approximants",

abstract = "We have studied the magnetic and transport properties of Tsai-type quasicrystalline approximants, AuxAl841xCe16 and AuyAl861yCe14 by the measurements of magnetic susceptibility», specific heat Cp and electrical resistivity µ. A Curie-Weiss behavior in» for all compounds indicates the stable trivalent state of Ce ions in AuAlCe. The effective magnetic moment increases with increasing the Au concentration whereas the Weiss temperature decreases. These behaviors suggest the Kondo effect in AuAlCe suppresses with the increase of Au concentration. In Cp, all measured compounds show a broad peak due to the Kondo resonance at 0.8 K. In addition, Cp/T shows a peak below 0.6 K, which implies the existence of spin-glass transition. In all compounds, a pronounced 1log T behavior due to Kondo effect are observed in µ(T) below 10 K. Moreover, AuyAl861yCe14 approximants are the first example displaying a precursor of coherent Kondo state at low temperatures because a broad maximum is observed in µ(T) at 1.3 K.",

keywords = "AuAlCe, Coherent kondo state, Electrical resistivity, Kondo effect, Magnetic susceptibility, Quasicrystal approximants, Specific heat, Spin-glass",

author = "Yuji Muro and Tadashi Fukuhara and Takahiro Namiki and Tomohiko Kuwai and Akira Sakurai and Asuka Ishikawa and Shintaro Suzuki and Ryuji Tamura",

note = "Publisher Copyright: {\textcopyright} 2021 The Japan Institute of Metals and Materials",

year = "2021",

month = mar,

day = "1",

doi = "10.2320/matertrans.MT-MB2020008",

language = "英語",

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T1 - Composition effect of kondo behavior in aualce quasicrystalline approximants

AU - Muro, Yuji

AU - Fukuhara, Tadashi

AU - Namiki, Takahiro

AU - Kuwai, Tomohiko

AU - Sakurai, Akira

AU - Ishikawa, Asuka

AU - Suzuki, Shintaro

AU - Tamura, Ryuji

PY - 2021/3/1

Y1 - 2021/3/1

N2 - We have studied the magnetic and transport properties of Tsai-type quasicrystalline approximants, AuxAl841xCe16 and AuyAl861yCe14 by the measurements of magnetic susceptibility», specific heat Cp and electrical resistivity µ. A Curie-Weiss behavior in» for all compounds indicates the stable trivalent state of Ce ions in AuAlCe. The effective magnetic moment increases with increasing the Au concentration whereas the Weiss temperature decreases. These behaviors suggest the Kondo effect in AuAlCe suppresses with the increase of Au concentration. In Cp, all measured compounds show a broad peak due to the Kondo resonance at 0.8 K. In addition, Cp/T shows a peak below 0.6 K, which implies the existence of spin-glass transition. In all compounds, a pronounced 1log T behavior due to Kondo effect are observed in µ(T) below 10 K. Moreover, AuyAl861yCe14 approximants are the first example displaying a precursor of coherent Kondo state at low temperatures because a broad maximum is observed in µ(T) at 1.3 K.

AB - We have studied the magnetic and transport properties of Tsai-type quasicrystalline approximants, AuxAl841xCe16 and AuyAl861yCe14 by the measurements of magnetic susceptibility», specific heat Cp and electrical resistivity µ. A Curie-Weiss behavior in» for all compounds indicates the stable trivalent state of Ce ions in AuAlCe. The effective magnetic moment increases with increasing the Au concentration whereas the Weiss temperature decreases. These behaviors suggest the Kondo effect in AuAlCe suppresses with the increase of Au concentration. In Cp, all measured compounds show a broad peak due to the Kondo resonance at 0.8 K. In addition, Cp/T shows a peak below 0.6 K, which implies the existence of spin-glass transition. In all compounds, a pronounced 1log T behavior due to Kondo effect are observed in µ(T) below 10 K. Moreover, AuyAl861yCe14 approximants are the first example displaying a precursor of coherent Kondo state at low temperatures because a broad maximum is observed in µ(T) at 1.3 K.

KW - AuAlCe

KW - Coherent kondo state

KW - Electrical resistivity

KW - Kondo effect

KW - Magnetic susceptibility

KW - Quasicrystal approximants

KW - Specific heat

KW - Spin-glass

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SN - 1345-9678

VL - 62

SP - 321

EP - 324

JO - Materials Transactions

JF - Materials Transactions

IS - 3

ER -

Composition effect of kondo behavior in aualce quasicrystalline approximants

Abstract

Keywords

ASJC Scopus subject areas

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