The electrical conductivity of single-grain Al-Pd-Re quasicrystals

Fisher, I. R.; Xie, Xiaozhu; Tudosă, Ioan; Gao, Chunxiao; Song, Changjiang; Canfield, Paul C.; Kracher, A.; Dennis, K. W.; Abanoz, D.; Kramer, Matt

doi:10.1080/13642810210122179

Cited by 15 publications

(32 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These lectures were based on my past twenty (or so) years of experience in the broad field of design, discovery, growth, characterization and understanding of novel materials. Whereas we have published literally hundreds of papers on the characterization (and hopefully added to the understanding) of a wide number of materials ranging from local moment magnetism, [1][2][3][4] to quasicrystals [5][6][7][8][9][10] and spinglasses [11][12][13][14] and from superconductors [15][16][17][18][19][20][21][22] to heavy fermions, [23][24][25][26][27][28] we have only published a small number of papers that explicitly outline how we synthesize the vast majority of these compounds: by solution growth. [29][30][31][32] This paper is an attempt to augment and compliment these technical, solution growth papers.…”

Section: Introductionmentioning

confidence: 99%

Solution Growth of Intermetallic Single Crystals: A Beginner's Guide

Canfield

2009

Properties and Applications of Complex Intermetallics

View full text Add to dashboard Cite

Progress in experimental solid state physics, as well as in related disciplines, is often hampered by limited access to single crystals of novel materials. This lack of single crystalline samples constrains researchers to study or measure materials that are available rather than the materials that are most relevant to the questions at hand. The extreme example of this is the allegorical Ph.D. student who has to measure the one crystal that the advisor has on hand, regardless of the physical question to be probed. As part of the second Euroschool on complex metals I presented lectures on the design, discovery, growth and characterization of novel intermetallic compounds. In this paper I will focus on the basics of solution growth of novel compounds.

show abstract

Section: Introductionmentioning

confidence: 99%

Solution Growth of Intermetallic Single Crystals: A Beginner's Guide

Canfield

2009

Properties and Applications of Complex Intermetallics

View full text Add to dashboard Cite

show abstract

“…1. We provide arguments why the case for an extrinsic origin of the insulating behavior in i-AlPdRe samples [6,7,11] is inconclusive. Specifically, our chemical analysis shows that the composition range common to highly resistive ribbons and ingots is significantly different from that of the few metallic single-grains measured.…”

Section: Introductionmentioning

confidence: 91%

“…In other words, this alloy of metals becomes an insulator, the origin for this remarkable result being attributed to the specificity of the i-AlPdRe phase. However, in the early 2000's, electrical measurements performed on i-AlPdRe single-grains [5,6] showed significantly higher conductivity σ 4K > 200Ω −1 cm −1 and lower RRR < 2.5, thereby placing i-AlPdRe single grains on the metallic side of the MIT. These values are similar to those observed in the i-AlCuFe and i-AlPdMn phases.…”

Section: Introductionmentioning

confidence: 99%

The question of intrinsic origin of the metal-insulator transition in i-AlPdRe quasicrystal

Delahaye

Berger

2015

Eur. Phys. J. B

View full text Add to dashboard Cite

The icosahedral (i-) AlPdRe is the most resistive quasicrystalline alloy discovered so far. Resistivities (ρ) of 1Ωcm at 4K and correlated resistance ratios (RRR = ρ4K /ρ300K ) of more than 200 are observed in polycrystalline samples. These values are two orders of magnitude larger than for the isomorphous i-AlPdMn phase. We discuss here the controversial microscopic origin of the i-AlPdRe alloy electrical specificity. It has been proposed that the high resistivity values are due to extrinsic parameters, such as secondary phases or oxygen contamination. From comprehensive measurements and data from the literature including electronic transport correlated with micro structural and micro chemical analysis, we show that on the contrary there is mounting evidence in support of an origin intrinsic to the i-phase. Similarly to the other quasicrystalline alloys, the electrical resistivity of the i-AlPdRe samples depends critically on minute changes in the structural quality and chemical composition. The low resistivity in i-AlPdRe single-grains compared to polycrystaline samples can be explained by difference in chemical composition, heterogeneity and thermal treatment.

show abstract

“…To resolve this issue, we used the data available in the literature for Al-Pd-Re materials, monocrystalline with σ 0 ∼ 176 (Ω cm) -1 [14] and amorphous with σ 0 ∼ 1470 (Ω cm) -1 [15], i.e., for dense materials morphologically different from polycrystals [1][2][3][4][5]. The corresponding curves are shown in Figs.…”

Section: Experimental Justificationmentioning

confidence: 99%

“…After thirty years of intensive research, variable range hopping (VRH) conductivity has become the focus of violent polemics about the intrinsic and nonintrinsic properties of quasicrystals [1][2][3][4][5][6]. This is not accidental.…”

Section: Introductionmentioning

confidence: 99%

On Modified Mott (Т–1/4) Law in the Conductivity of Quasicrystals

Prekul

Shchegolikhina

2021

Phys. Metals Metallogr.

View full text Add to dashboard Cite

In the conductivity of quasicrystals, modified with a metal additive, numerous cases of manifestation of the Mott Т -1/4 law have been found. In the icosahedral phases of the Al-Pd-Re system, this anomaly is observed not only in the limit of the marginal metallic conductivity, as was known until now, but long before this limit is reached. It is also shown that similar anomalies are characteristic of the Al-Cu-Fe system of quasicrystalline alloys, the level of metallic conductivity of which is two to three orders of magnitude higher than that in polycrystalline Al-Pd-Re materials. It is assumed that these anomalies are the manifestation of a wide distribution of two-level excitations of "chemically" localized electrons.

show abstract

The electrical conductivity of single-grain Al-Pd-Re quasicrystals

Cited by 15 publications

References 23 publications

Solution Growth of Intermetallic Single Crystals: A Beginner's Guide

Solution Growth of Intermetallic Single Crystals: A Beginner's Guide

The question of intrinsic origin of the metal-insulator transition in i-AlPdRe quasicrystal

On Modified Mott (Т–1/4) Law in the Conductivity of Quasicrystals

Contact Info

Product

Resources

About