The electron transport properties of metallic glasses

Howson, M. A.; Gallagher, B. L.

doi:10.1016/0370-1573(88)90145-7

Cited by 249 publications

(150 citation statements)

References 128 publications

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“…In addition, ͑i͒ the temperature dependence of the Seebeck coefficient: [5][6][7] is clearly nonlinear, exhibiting well-defined extrema in most instances, ͑ii͒ small variations in the chemical composition give rise to sign reversals in the S(T) value, ͑iii͒ for a given sample stoichiometry it shows a strong dependence on the heat treatments applied to the sample, 15 and ͑iv͒ S(T) has large values when compared to those of disordered metallic systems. 23 Therefore, the situation is quite different from that observed in amorphous materials, where the S(T) curve is dominated by electron diffusion yielding a linear temperature dependence. Therefore, the electronic transport properties of quasicrystalline alloys exhibit unusual composition and temperature dependences, resembling more semiconductorlike than metallic character.…”

Section: Physical Motivationsmentioning

confidence: 87%

Theoretical prospective of quasicrystals as thermoelectric materials

Maciá

2001

Phys. Rev. B

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In this work we present a theoretical study on the possible use of quasicrystals as potential thermoelectric materials. By considering a suitable model for the spectral conductivity we show that high values of the thermoelectric figure of merit, beyond the practical upper limit ZTϭ1, may be expected for certain quasicrystalline alloys. We also study their performance at different working temperature ranges, favoring low temperature thermoelectric applications for these materials. By comparing our analytical results with available experimental data on the transport coefficients of different quasicrystalline families, we suggest the icosahedral Cd-Yb and the dodecagonal Ta-Te binary phases as two promising candidates for further research.

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Section: Physical Motivationsmentioning

confidence: 87%

Theoretical prospective of quasicrystals as thermoelectric materials

Maciá

2001

Phys. Rev. B

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“…However, a number of other contributions can arise, 9 including the magnetic single-ion Kondo scattering and a model associated with quantum tunneling between metastable two-level states developed by Cochrane et al 10 These tunneling states can be associated with structural as well as magnetic disorder, and indeed a low-temperature resistivity minimum is commonly observed in nonmagnetic metallic glasses. 11 Previously, it was shown 7,12 that amorphous NiMn films exhibit a RSG behavior similar to that of the corresponding polycrystalline materials. Recently, we have carried out magnetic measurements of flash-evaporated Pd doped NiMn alloys to investigate the role of Pd atoms on the magnetic states of these alloys for zero field cooled ͑ZFC͒ or FC cases.…”

Section: Introductionmentioning

confidence: 94%

Effect of exchange bias on the electrical resistivity of Pd doped NiMn thin films: Two-channel Kondo system

Öner

Kamer

Ross

2006

Journal of Applied Physics

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Electrical resistivity measurements have been carried out for both flash-evaporated reentrant spin glasses ͑RSGs͒ ͑Ni 76−x Pd x ͒Mn 24 and Ni 74.5 Mn 23.5 Pd 2 , as well as Ni 75 Mn 23 Pd 2 , a pure SG. These measurements were carried out at temperatures down to 4 K. We observed a very deep resistivity minimum at about 75 K for Ni 74 Mn 24 Pd 2 . It was found previously ͓Öner et al., J. Appl. Phys. 89, 7044 ͑2001͔͒ that this sample shows the largest coercivity and exchange unidirectional anisotropy among these films. In addition, magnetization measurements show that this takes place just on the border of the RSG such that it could be handled as a superparamagnetic sample. Previously it was assumed that the exchange bias created in the sample between the domains plays the dominant role in the resistivity minimum. On the other hand, in order to account for the temperature dependence of the resistivity below the minimum we have analyzed these data using the Kondo, two-channel Kondo, weak localization, and Cochrane models for structural disorder based on the Anderson mechanism. We have deduced that the two-channel Kondo model gives the best agreement with the data; a logarithmic temperature dependence ⌬ ͑T͒ = ␤ log 10 ͑T / T K ͒, was observed at the temperatures below T f accompanied by a resistivity behavior ⌬ ͑T͒ = 0m ͑0͒͑1−␣T 1/2 ͒, at lower temperatures. All parameters deduced from the fitting correlate consistently with the strength of the exchange anisotropy and coercivity in the RSG films, and thus provide a separate measure of the presence of antiferromagnetically coupled domains in these materials.

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“…Not only pure Ni clusters are the focus of attention [9,26], Ni-Nb alloy has been used in superconducting magnet, the systems show many peculiar properties in the structure and electronic properties when Ni is doped in semiconductor silicon, germanium and bivalent alkali metal clusters [27][28][29]. Ni and Zr alloy has superconducting property [30], what is more important is that it has many advantages compared with other alloy glass, such as positive hall coefficient [31], quantum interference effect [32], big induction conductivity of anisotropy [33], besides, it can exist in large doping concentration scope, therefore the Zr-Ni alloy attracts people's attention [34][35][36]. However, by now the research on geometrical structure and other properties of Zr n Ni clusters in experiment and theory is rare.…”

Section: Introductionmentioning

confidence: 99%

The Ground State Structures and Magnetic Properties of Zr_nNi (n=1-9) Clusters from First Principles Calculation

et al. 2017

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The ground state structures and magnetic properties of ZrnNi (n = 1-9) clusters are studied by using first principles calculation. Firstly, we find the ground state configurations of ZrnNi (n = 1-9) clusters. Secondly, the magic clusters (Zr2Ni and Zr7Ni) of ZrnNi clusters are found by the comparisons of average binding energies, the second-order energy difference and energy gaps between the highest occupied orbital and the lowest unoccupied orbital of the ground state of ZrnNi clusters. Thirdly, the calculated results show that magnetic moment of ZrnNi (n = 1-2) clusters is 4 µB; however, the magnetic moment of ZrnNi clusters is about 2 µB for n = 3-9 (exception for n = 7). Finally, it is found that the magnetic moment of ZrnNi cluster mainly comes from Zr atom and Ni atom is the electron acceptor from the Mulliken population analysis.

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The electron transport properties of metallic glasses

Cited by 249 publications

References 128 publications

Theoretical prospective of quasicrystals as thermoelectric materials

Theoretical prospective of quasicrystals as thermoelectric materials

Effect of exchange bias on the electrical resistivity of Pd doped NiMn thin films: Two-channel Kondo system

The Ground State Structures and Magnetic Properties of Zr_nNi (n=1-9) Clusters from First Principles Calculation

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The electron transport properties of metallic glasses

Cited by 249 publications

References 128 publications

Theoretical prospective of quasicrystals as thermoelectric materials

Theoretical prospective of quasicrystals as thermoelectric materials

Effect of exchange bias on the electrical resistivity of Pd doped NiMn thin films: Two-channel Kondo system

The Ground State Structures and Magnetic Properties of ZrnNi (n=1-9) Clusters from First Principles Calculation

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The Ground State Structures and Magnetic Properties of Zr_nNi (n=1-9) Clusters from First Principles Calculation