The effect of martensitic phase transition from cubic to tetragonal on the physical properties of V 3 Si superconductor

Tütüncü, H. M.; Uzunok, H.Y.; Srivastava, G. P.; Özdemir, Veysel; Uğur, G.

doi:10.1016/j.intermet.2018.02.010

Cited by 8 publications

(2 citation statements)

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“…We speculate that a structural phase transition may have occurred at T * in the high-content cobalt-doped samples (x ⩾ 0.15). Previous studies have shown a martensitic cubic to tetragonal phase transition at a temperature of about 18.9 K in the V 3 Si compound [16][17][18][19]. Besides, the hydrostatic pressure will gradually suppress this martensitic phase transition [36,37].…”

Section: Resultsmentioning

confidence: 93%

“…These include the anisotropy of the upper critical field and specific heat, De Hass-Van Alphen effect, and large ratio of T c with Fermi temperature (T F ). Strong evidence exists that a martensitic cubic to tetragonal phase transition occurs at about 18.9 K, slightly above the T c [16][17][18][19]. Unusual softening of the acoustic phonons in V 3 Si has been reported [20,21].…”

Section: Introductionmentioning

confidence: 97%

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Superconductivity in the cobalt-doped V₃Si A15 intermetallic compound

Zeng¹,

Zhou²,

Du³

et al. 2023

Supercond. Sci. Technol.

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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 V3-xCoxSi (0 ≤ x ≤ 0.30) alloys. It is found that the lattice parameter decreases with increasing cobalt-doped content and leads to an increased residual resistivity ratio (RRR) value of the V3-xCoxSi system. Meanwhile, the superconducting transition temperature (Tc) cobalt-doped content. Furthermore, the fitted data show that the increase of cobalt-doped content also reduces the lower/upper critical fields of the V3-xCoxSi system. Type-II superconductivity is demonstrated on all V3-xCoxSi samples. With higher Co-doped content, V3-xCoxSi (0.15 ≤ x ≤ 0.30) alloys may have superconducting and structural phase transitions at low-temperature regions. As the electron/atom (e/a) ratio increases, the Tc variation trend of V3Si is as pronounced as in crystalline alloys and monotonically follows the trend observed for amorphous superconductors.

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