Abstract
A quasiperiodic intermediate-valence (IV) system is realized in an icosahedral Au-Al-Yb quasicrystal. X-ray absorption spectroscopy near the Yb L 3 edge indicates that quasiperiodically arranged Yb ions assume a mean valence of 2.61, between a divalent state (4f14, J=0) and a trivalent one (4f13, J=7/2). Magnetization measurements demonstrate that the 4f holes in this quasicrystal have a localized character. The magnetic susceptibility shows a Curie-Weiss behavior above ∼100 K with an effective magnetic moment of 3.81μ B per Yb. Moreover, a crystalline approximant to this quasicrystal is an IV compound. We propose a heterogeneous IV model for the quasicrystal, whereas the crystalline approximant is most likely a homogeneous IV system. At temperatures below ∼10 K, specific heat and magnetization measurements reveal non-Fermi-liquid behavior in both the quasicrystal and its crystalline approximant without either doping, pressure, or field tuning.
| Original language | English |
|---|---|
| Article number | 094201 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 86 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2012 Sep 10 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
Intermediate-valence icosahedral Au-Al-Yb quasicrystal. / Watanuki, Tetsu; Kashimoto, Shiro; Kawana, Daichi; Yamazaki, Teruo; MacHida, Akihiko; Tanaka, Yukinori; Sato, Taku J.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 86, No. 9, 094201, 10.09.2012.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Intermediate-valence icosahedral Au-Al-Yb quasicrystal
AU - Watanuki, Tetsu
AU - Kashimoto, Shiro
AU - Kawana, Daichi
AU - Yamazaki, Teruo
AU - MacHida, Akihiko
AU - Tanaka, Yukinori
AU - Sato, Taku J.
PY - 2012/9/10
Y1 - 2012/9/10
N2 - A quasiperiodic intermediate-valence (IV) system is realized in an icosahedral Au-Al-Yb quasicrystal. X-ray absorption spectroscopy near the Yb L 3 edge indicates that quasiperiodically arranged Yb ions assume a mean valence of 2.61, between a divalent state (4f14, J=0) and a trivalent one (4f13, J=7/2). Magnetization measurements demonstrate that the 4f holes in this quasicrystal have a localized character. The magnetic susceptibility shows a Curie-Weiss behavior above ∼100 K with an effective magnetic moment of 3.81μ B per Yb. Moreover, a crystalline approximant to this quasicrystal is an IV compound. We propose a heterogeneous IV model for the quasicrystal, whereas the crystalline approximant is most likely a homogeneous IV system. At temperatures below ∼10 K, specific heat and magnetization measurements reveal non-Fermi-liquid behavior in both the quasicrystal and its crystalline approximant without either doping, pressure, or field tuning.
AB - A quasiperiodic intermediate-valence (IV) system is realized in an icosahedral Au-Al-Yb quasicrystal. X-ray absorption spectroscopy near the Yb L 3 edge indicates that quasiperiodically arranged Yb ions assume a mean valence of 2.61, between a divalent state (4f14, J=0) and a trivalent one (4f13, J=7/2). Magnetization measurements demonstrate that the 4f holes in this quasicrystal have a localized character. The magnetic susceptibility shows a Curie-Weiss behavior above ∼100 K with an effective magnetic moment of 3.81μ B per Yb. Moreover, a crystalline approximant to this quasicrystal is an IV compound. We propose a heterogeneous IV model for the quasicrystal, whereas the crystalline approximant is most likely a homogeneous IV system. At temperatures below ∼10 K, specific heat and magnetization measurements reveal non-Fermi-liquid behavior in both the quasicrystal and its crystalline approximant without either doping, pressure, or field tuning.
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U2 - 10.1103/PhysRevB.86.094201
DO - 10.1103/PhysRevB.86.094201
M3 - Article
AN - SCOPUS:84866141079
VL - 86
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 0163-1829
IS - 9
M1 - 094201
ER -