X-Ray Photoemission Spectroscopic Study of Ce-Based Amorphous Alloys

Yoshiya Homma; Masaoki Oku; Kenji Sumiyama; Takehiko Hihara; Hitoshi Amano; Kenji Suzuki

doi:10.1143/JPSJ.66.1378

X-Ray Photoemission Spectroscopic Study of Ce-Based Amorphous Alloys

Yoshiya Homma, Masaoki Oku, Kenji Sumiyama, Takehiko Hihara, Hitoshi Amano, Kenji Suzuki

Materials Processing and Characterization Division

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

Abstract

Valence band and core level XPS spectra have been measured for the amorphous Ce_xRu_100-x (x = 18, 58, 81), Ce_xCu_100-x (x = 14, 33, 50) and Ce₆₆Si₃₄ alloys produced by sputtering. The coupling constant between the 4f and conduction electron levels, Δ, and the number of 4f electrons, n_f, are estimated from the Ce-3d core level spectra. The amorphous Ce_xCu_100-x (x = 14, 33, 50) and Ce₆₆Si₃₄ alloys are heavy fermion systems with small Δ, while the amorphous Ce_xRu_100-x (x = 18, 58, 81) alloys are intermediate valence systems with large Δ. We also derive the zero temperature magnetic susceptibility, _χ(0), and Kondo temperature, T_κ, from these spectroscopic data and compare with those estimated from several low temperature physical properties.

Original language	English
Pages (from-to)	1378-1386
Number of pages	9
Journal	Journal of the Physical Society of Japan
Volume	66
Issue number	5
DOIs	https://doi.org/10.1143/JPSJ.66.1378
Publication status	Published - 1997 Jan 1

Keywords

Amorphous alloy
Cerium-copper
Cerium-ruthenium
Cerium-silicon
Core-level
Heavy fermion
Intermediate valence
Kondo temperature
Magnetic susceptibility
Valence band
XPS

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1143/JPSJ.66.1378

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@article{97e55793107649d2b70bae169fdbbb6c,

title = "X-Ray Photoemission Spectroscopic Study of Ce-Based Amorphous Alloys",

abstract = "Valence band and core level XPS spectra have been measured for the amorphous CexRu100-x (x = 18, 58, 81), CexCu100-x (x = 14, 33, 50) and Ce66Si34 alloys produced by sputtering. The coupling constant between the 4f and conduction electron levels, Δ, and the number of 4f electrons, nf, are estimated from the Ce-3d core level spectra. The amorphous CexCu100-x (x = 14, 33, 50) and Ce66Si34 alloys are heavy fermion systems with small Δ, while the amorphous CexRu100-x (x = 18, 58, 81) alloys are intermediate valence systems with large Δ. We also derive the zero temperature magnetic susceptibility, χ(0), and Kondo temperature, Tκ, from these spectroscopic data and compare with those estimated from several low temperature physical properties.",

keywords = "Amorphous alloy, Cerium-copper, Cerium-ruthenium, Cerium-silicon, Core-level, Heavy fermion, Intermediate valence, Kondo temperature, Magnetic susceptibility, Valence band, XPS",

author = "Yoshiya Homma and Masaoki Oku and Kenji Sumiyama and Takehiko Hihara and Hitoshi Amano and Kenji Suzuki",

year = "1997",

month = jan,

day = "1",

doi = "10.1143/JPSJ.66.1378",

language = "English",

volume = "66",

pages = "1378--1386",

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

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publisher = "Physical Society of Japan",

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T1 - X-Ray Photoemission Spectroscopic Study of Ce-Based Amorphous Alloys

AU - Homma, Yoshiya

AU - Oku, Masaoki

AU - Sumiyama, Kenji

AU - Hihara, Takehiko

AU - Amano, Hitoshi

AU - Suzuki, Kenji

PY - 1997/1/1

Y1 - 1997/1/1

N2 - Valence band and core level XPS spectra have been measured for the amorphous CexRu100-x (x = 18, 58, 81), CexCu100-x (x = 14, 33, 50) and Ce66Si34 alloys produced by sputtering. The coupling constant between the 4f and conduction electron levels, Δ, and the number of 4f electrons, nf, are estimated from the Ce-3d core level spectra. The amorphous CexCu100-x (x = 14, 33, 50) and Ce66Si34 alloys are heavy fermion systems with small Δ, while the amorphous CexRu100-x (x = 18, 58, 81) alloys are intermediate valence systems with large Δ. We also derive the zero temperature magnetic susceptibility, χ(0), and Kondo temperature, Tκ, from these spectroscopic data and compare with those estimated from several low temperature physical properties.

AB - Valence band and core level XPS spectra have been measured for the amorphous CexRu100-x (x = 18, 58, 81), CexCu100-x (x = 14, 33, 50) and Ce66Si34 alloys produced by sputtering. The coupling constant between the 4f and conduction electron levels, Δ, and the number of 4f electrons, nf, are estimated from the Ce-3d core level spectra. The amorphous CexCu100-x (x = 14, 33, 50) and Ce66Si34 alloys are heavy fermion systems with small Δ, while the amorphous CexRu100-x (x = 18, 58, 81) alloys are intermediate valence systems with large Δ. We also derive the zero temperature magnetic susceptibility, χ(0), and Kondo temperature, Tκ, from these spectroscopic data and compare with those estimated from several low temperature physical properties.

KW - Amorphous alloy

KW - Cerium-copper

KW - Cerium-ruthenium

KW - Cerium-silicon

KW - Core-level

KW - Heavy fermion

KW - Intermediate valence

KW - Kondo temperature

KW - Magnetic susceptibility

KW - Valence band

KW - XPS

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DO - 10.1143/JPSJ.66.1378

M3 - Article

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JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

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ER -

X-Ray Photoemission Spectroscopic Study of Ce-Based Amorphous Alloys

Abstract

Keywords

ASJC Scopus subject areas

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