dHvA EFFECT IN THE NORMAL STATE OF THE HIGH TcA-15 SUPERCONDUCTORS Nb3Sn AND V3Si

Arko, A. J.; Lowndes, D. H.; Muller, F.; Roeland, L.W.; Wolfrat, Jules; Mueller, F. M.; Webb, G.W.

doi:10.1051/jphyscol:19786185

Cited by 2 publications

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“…The martensitic transformation is a phenomenon in which the crystal structure spontaneously transforms from cubic to tetragonal upon cooling below the martensitic transformation temperature T M in low-resistivity Nb 3 Sn. This phenomenon was studied in detail by Mailfert et al [24], Arko et al [25], Watanabe et al [26], Axe et al [27], and Mentink et al [28] in which the effect of the martensitic transformation on the normal state resistivity r n and the phonon properties of lowresistivity Nb 3 Sn were investigated. In these analyses, the martensitic transformation temperature T M was determined at 45±7K, which corresponds to a normal state resistivity of 27±3 mWcm [28].…”

Section: Occurrence Of the Martensitic Transformationmentioning

confidence: 99%

“…The experimental observations (figure 11) consist of resistive measurements of thin films, bulk samples, and strands, after Mentink et al [50,72], Zhou et al [30], Jewell et al [73], Orlando et al [2], Devantay et al [29], and Godeke et al [71]. In addition, radio-frequency measurements of bulk material were taken by Foner et al [74], and magnetic measurements of bulk material were taken by Arko et al [25] and Jewell et al [73]. Critical current density measurements of binary thin film samples were performed by Mentink et al [3].…”

Section: Upper Critical Magnetic Field H C2 As a Function Of Critical...mentioning

confidence: 99%

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The effects of disorder on the normal state and superconducting properties of Nb₃Sn

Mentink

Dhallé

Dietderich

et al. 2016

Supercond. Sci. Technol.

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The effect of disorder on the normal state resistivity and the superconducting properties of Nb 3 Sn is explored in a combination of ab-initio calculations and microscopic theory. The crystal symmetry is calculated to be preferentially tetragonal at a normal state resistivity below 27.0±1.4 µΩcm, and preferentially cubic above this value, which is shown to be consistent with the experimentally observed transition point. The phonon density of states, the Eliashberg spectrum α 2 (ω)F (ω), the electron-phonon coupling constant, the characteristic frequency, the critical temperature T c , and the upper critical magnetic field at 0 K H c2 (0) are calculated over a large normal state resistivity range and shown to be consistent with experimental observations. The high degree of consistency between the calculation results and experimental observations is a strong indication that the calculation approach utilized here, a combination of ab-initio calculations and microscopic theory, is useful tool for understanding the superconducting and normal state properties of Nb 3 Sn.

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Section: Occurrence Of the Martensitic Transformationmentioning

confidence: 99%

Section: Upper Critical Magnetic Field H C2 As a Function Of Critical...mentioning

confidence: 99%

The effects of disorder on the normal state and superconducting properties of Nb₃Sn

Mentink

Dhallé

Dietderich

et al. 2016

Supercond. Sci. Technol.

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“…Obviously, the observed anomalies in the elastic behaviors are closely related to the cubic-to-tetragonal lattice transformation near T M . The martensitic transformation temperature of Nb 3 Sn materials is about 45 ± 7 K [51][52][53]. Third, the texture of polycrystalline Nb 3 Sn causes an elastic anisotropy in Nb 3 Sn superconducting wires [54].…”

Section: Main Factors Affecting the Young's Modulus Of Polycrystallin...mentioning

confidence: 99%

Analysis of the strain dependence of the superconducting critical properties of single-crystal and polycrystalline Nb₃Sn

Ding¹,

Gao²

2021

Supercond. Sci. Technol.

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The aim of this article is to present a three-dimensional (3D) simulation based on Voronoi tessellation, used to assess the strain dependence of the superconducting critical properties of inhomogeneous polycrystalline Nb3Sn at the microstructural level. To support this objective, we first present a polycrystalline model with equiaxed grains used to analyze the relationship between the polycrystalline structure and the strain response. We analyze the Young’s moduli of Nb3Sn at different temperatures with random and preferential polycrystalline orientations, and the relation between the Young’s modulus of polycrystalline Nb3Sn and spontaneous tetragonal transformation is discussed. The results indicate that the elastic properties (Young’s modulus, stress/strain field) of polycrystalline Nb3Sn are mainly associated with ambient temperature and phase transition and are affected by the grain orientation. Meanwhile, an estimation-based model for the superconducting critical properties of single-crystal Nb3Sn is proposed. This model is based on changes in the electron density of states and phonon frequency induced by strain. The results calculated by the estimation-based model are consistent with the experimental data and the values calculated according to first principles. The change in the strain-induced superconducting properties of polycrystalline Nb3Sn is analyzed by combining the numerically simulated strain field of the polycrystal with the estimation-based model of single-crystal Nb3Sn. Compared to ideal single-crystal Nb3Sn, the superconducting critical temperature of the polycrystalline Nb3Sn superconductor has a higher strain sensitivity, which is related to the non-uniformity of the strain field of the polycrystal.

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dHvA EFFECT IN THE NORMAL STATE OF THE HIGH T_cA-15 SUPERCONDUCTORS Nb₃Sn AND V₃Si

Cited by 2 publications

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The effects of disorder on the normal state and superconducting properties of Nb₃Sn

The effects of disorder on the normal state and superconducting properties of Nb₃Sn

Analysis of the strain dependence of the superconducting critical properties of single-crystal and polycrystalline Nb₃Sn

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dHvA EFFECT IN THE NORMAL STATE OF THE HIGH TcA-15 SUPERCONDUCTORS Nb3Sn AND V3Si

Cited by 2 publications

References 0 publications

The effects of disorder on the normal state and superconducting properties of Nb3Sn

The effects of disorder on the normal state and superconducting properties of Nb3Sn

Analysis of the strain dependence of the superconducting critical properties of single-crystal and polycrystalline Nb3Sn

Contact Info

Product

Resources

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dHvA EFFECT IN THE NORMAL STATE OF THE HIGH T_cA-15 SUPERCONDUCTORS Nb₃Sn AND V₃Si

The effects of disorder on the normal state and superconducting properties of Nb₃Sn

The effects of disorder on the normal state and superconducting properties of Nb₃Sn

Analysis of the strain dependence of the superconducting critical properties of single-crystal and polycrystalline Nb₃Sn