Direct experimental evidence of phonon–phason coupling in an Al-Pd-Mn icosahedral quasicrystal

Zhang, Jinjia; Kamimura, Yashushi; Tokumoto, Yuki; Edagawa, Keiichi

doi:10.1080/14786435.2022.2052376

Cited by 5 publications

(7 citation statements)

References 40 publications

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“…( 3) is induced. The simulation method was described in detail in our previous paper [12] and is reviewed in the following section. The induced phason strain ind ij w leads to the shifting of Bragg spots in the 3D reciprocal space: for the measured X-ray peaks of the as-grown sample.…”

Section: Resultsmentioning

confidence: 99%

“…The method used in our previous work to evaluate the phonon-phason coupling strength of a Mackay-type Al-Pd-Mn icosahedral system [12] was applied to evaluate the coupling strength of a Tsai-type Ag-In-Yb icosahedral system. In our experiment, phonon strain was applied to single crystals of Ag-In-Yb icosahedral QC at a temperature with active phason.…”

Section: Discussionmentioning

confidence: 99%

“…Finally, the samples were powdered and subjected to X-ray diffraction measurements using Cu Kα radiation at 40 kV and 200 mA. The calculation method is described in detail in our previous work [12]. We summarize the equations used in our calculation as follows.…”

Section: Experimental Procedures and Calculation Methodsmentioning

confidence: 99%

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Phonon–Phason Coupling Strength in a Tsai-Type Ag–In–Yb Icosahedral Quasicrystal

et al. 2023

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Owing to the quasiperiodic order, one independent term in the elasticity of quasicrystals (phonon-phason coupling) is characteristic of quasicrystals. It is not seen in conventional crystals and has continued to be a significant subject in the research field of quasicrystals.Recently, a novel method was applied to a Mackay-type Al-Pd-Mn icosahedral quasicrystal to prove the existence of phonon-phason coupling and to evaluate its strength based on the elasticity of quasicrystals. This study applied the method to a Tsai-type Ag-In-Yb icosahedral system to evaluate its phonon-phason coupling strength. We applied phonon strain to the quasicrystal at a temperature with active phason, and the induction of phason strain was successfully detected and evaluated using powder X-ray diffraction. We evaluated the phonon-phason coupling elastic constant of the Ag-In-Yb icosahedral quasicrystal to be 0.17 ± 0.04 GPa by quantitatively comparing the measured induced phason strain with our calculation results.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Phonon–Phason Coupling Strength in a Tsai-Type Ag–In–Yb Icosahedral Quasicrystal

et al. 2023

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“…The principle of this method to probe the phonon-phason coupling effect in QCs is simple and straightforward; we applied a phonon strain to a QC and examined the phason strain induced [8]. In this section, we briefly review the generalized elasticity of three-dimensional (3D) d-QCs and summarize formulas used in the following sections.…”

Section: Calculation Methods and Experimental Proceduresmentioning

confidence: 99%

“…However, because CAs are different phases from the QCs, the aforementioned method does not directly inspect the elastic free energy function ) , ( el ij ij w u f of the QCs; therefore, the estimated coupling constants may not be accurate. Recently, a new approach [8], by which the function…”

Section: Introductionmentioning

confidence: 99%

Evaluating the phonon-phason coupling strength of an Al-Ni-Co decagonal quasicrystal

Zhang

Niu²,

Kamimura³

et al. 2023

J. Phys.: Conf. Ser.

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Recently, a novel method was proposed to probe the phonon-phason coupling effect in quasicrystals, and it was applied to an Al-Pd-Mn icosahedral quasicrystal. In this study, the method was applied to an Al-Ni-Co decagonal quasicrystal with a periodic layered structure of a two-dimensional quasicrystal. We applied elastic phonon strain along a 2-fold (aperiodic) axis in the quasicrystal plane at high temperatures with active phasons. Then, the phason strain was induced to the quasicrystal, which was demonstrated by the phason momentum (G ⊥) dependences of the powder X-ray diffraction peak widths. In contrast, when we applied phonon strain along the 10-fold periodic axis, no appreciable phason strain was observed to be induced. These results present clear evidence on the presence of phonon-phason coupling in a decagonal quasicrystal. The shape and width of the powder X-ray diffraction peaks were calculated based on the generalized elasticity of quasicrystals. The absolute value of the phonon-phason coupling constant was evaluated by quantitatively comparing the calculated results with the measured diffraction peaks.

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Thermoelectric properties of Tsai-type Au–(Al, Ga, In)–Gd approximants

Hiroto

Iwasaki

Kimura

et al. 2023

Journal of Alloys and Compounds

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Direct experimental evidence of phonon–phason coupling in an Al-Pd-Mn icosahedral quasicrystal

Cited by 5 publications

References 40 publications

Phonon–Phason Coupling Strength in a Tsai-Type Ag–In–Yb Icosahedral Quasicrystal

Phonon–Phason Coupling Strength in a Tsai-Type Ag–In–Yb Icosahedral Quasicrystal

Evaluating the phonon-phason coupling strength of an Al-Ni-Co decagonal quasicrystal

Thermoelectric properties of Tsai-type Au–(Al, Ga, In)–Gd approximants

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