Roles of Quasiperiodicity and Local Environment in the Electronic Transport of the Icosahedral Quasicrystals in Al-Pd-TM (TM=Fe, Ru, Os) Systems

Tamura, Ryuji; Asao, Takayuki; Takeuchi, Shin

doi:10.2320/matertrans.42.928

Cited by 11 publications

(11 citation statements)

References 10 publications

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“…Such a behavior is in contrast with the positive TCR observed in the 1/0-approximant. The present result clearly supports the idea that the electronic transport of the 2/1 approximant is essentially the same as that of quasicrystals [1]. indicating that the transport behavior of the 2/1 cubic approximant is essentially the same as that of quasicrystals.…”

Section: Methodssupporting

confidence: 89%

“…In particular, measurements of the electrical resistivity of crystalline approximants as well as quasicrystals have been performed in a number of alloy systems in order to understand the role of the longrange-order on the electronic transport. As a result, it has been found that high-order approximants as high as the 2/1 cubic approximant phase (2/1-phase) exhibit nearly the same behavior as that of the corresponding quasicrystalline phase [1,2].…”

Section: Introductionmentioning

confidence: 73%

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Electrical resistivity of the Al65Rh27Si8 2/1 cubic approximant

Koshikawa¹,

Yoda²,

Edagawa

et al. 2004

Journal of Non-Crystalline Solids

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Section: Methodssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 73%

Electrical resistivity of the Al65Rh27Si8 2/1 cubic approximant

Koshikawa¹,

Yoda²,

Edagawa

et al. 2004

Journal of Non-Crystalline Solids

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“…Al 2.7 Ir possesses a primitive cubic lattice with a ¼ 15.345(6), whereas Al 64.5 Ir 22 Pd 13.5 has a face-centered cubic lattice with a ¼ 15.497 (9). Scanning electron microscopy studies revealed that the samples prepared by the spark plasma sintering method have high homogeneity compared with those prepared by conventional arc-melting.…”

Section: Resultsmentioning

confidence: 99%

“…Electrical resistivities of Al--Pd--TM approximants have been investigated systematically and it has been conjectured that either the approximation degree or the lattice periodicity plays a crucial role in the sign of the TCR [9].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and superstructure of Al—Ir, Al—Ir—Pd crystalline approximants and their electrical resistivities

Oishi¹,

Nishimoto²,

Tamura³

2009

Zeitschrift Für Kristallographie - Crystalline Materials

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Crystalline approximant / Electrical resistivity / Al--Ir / Al--Ir--Pd Abstract. Chemically ordered Al 2.7 Ir and Al 64.5 Ir 22 Pd 13.5 1/0 approximants are prepared by two different methods and characterized by X-ray diffraction and transmission electron microscopy. Al 2.7 Ir possesses a primitive cubic lattice with a ¼ 15.345(6), whereas Al 64.5 Ir 22 Pd 13.5 has a face-centered cubic lattice with a ¼ 15.497(9). Examination of the samples prepared by two different methods reveals that the texture of the samples prepared by spark plasma sintering is more homogeneous than those prepared by arc melting. Electrical resistivities of both the compounds exhibit metallic characters, i.e., a positive temperature coefficient of the resistivity (TCR) with a high resistivity value. The results suggest that the TCR may not always be negative for 1/0 approximants with 15$16 periodicity but the high residual resistivities are common to all the approximants, which is presumably attributed to the common structural unit, an icosahedral cluster of $7.7.

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“…A [4]. In this paper, the results of electrical resistivity and specific heat measurements for i-Zn 81 Mg 6 Sc 13 , 2/1-Zn 82 Mg 5 Sc 13 and 1/1-Zn 85 Sc 15 are reported, and a comparison among them for different long-range order is made in detail.…”

Section: Introductionmentioning

confidence: 98%