Superconductivity in the cobalt-doped V 3 Si A15 intermetallic compound
Abstract The A15 structure of superconductors is a prototypical type-II superconductor that has generated considerable interest since the early history of superconducting materials. This paper discusses the superconducting properties of previously unreported V 3− x Co x Si (0 ⩽ x ⩽ 0.30) alloys. It...
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Published in | Superconductor science & technology Vol. 36; no. 3; p. 35003 |
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Main Authors | , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
01.03.2023
|
Online Access | Get full text |
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Summary: | Abstract
The A15 structure of superconductors is a prototypical type-II superconductor that has generated considerable interest since the early history of superconducting materials. This paper discusses the superconducting properties of previously unreported V
3−
x
Co
x
Si (0 ⩽
x
⩽ 0.30) alloys. It is found that the lattice parameter decreases with increasing cobalt-doped content and leads to an decreased residual resistivity ratio value of the V
3−
x
Co
x
Si system. Meanwhile, the superconducting transition temperature (
T
c
) also decreases with increasing cobalt-doped content. Furthermore, the fitted data show that the increase of cobalt-doped content also reduces the lower/upper critical fields of the V
3−
x
Co
x
Si system. Type-II superconductivity is demonstrated in all V
3−
x
Co
x
Si samples. With higher Co-doped content, V
3−
x
Co
x
Si (0.15 ⩽
x
⩽ 0.30) alloys may have superconducting and structural phase transitions in low-temperature regions. As the electron/atom ratio increases, the
T
c
variation trend of V
3
Si is as pronounced as in crystalline alloys and monotonically follows the trend observed for amorphous superconductors. |
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ISSN: | 0953-2048 1361-6668 |
DOI: | 10.1088/1361-6668/acadb4 |