In:
Superconductor Science and Technology, IOP Publishing, Vol. 35, No. 9 ( 2022-09-01), p. 095010-
Abstract:
Ba 0.5 Cs 0.5 Fe 2 As 2 films on BaFe 2 As 2 substrates with T c ∼ 29.8 K have been synthesized by a simple one-step self-flux method. Quasi-single-crystal Ba 0.5 Cs 0.5 Fe 2 As 2 films are more favorable in 122-type crystal structure but not in 1144-type. Based on the obtained Ba 0.5 Cs 0.5 Fe 2 As 2 films, the temperature and angle-dependent resistivity are measured under a magnetic field up to 9.0 T. The results indicate that the films exhibited high upper critical fields, strong flux pinning potential and low anisotropic factors. By scaling the resistivity within the framework of the anisotropic Ginzburg–Landau (GL) theory, the angle-dependent resistivity of Ba 0.5 Cs 0.5 Fe 2 As 2 films under various magnetic fields at a fixed temperature can be scaled to one curve. Both the Werthamer–Helfand–Hohenberg and GL methods give a similar anisotropic factor ∼3.0. Ba 0.5 Cs 0.5 Fe 2 As 2 , cannot naturally grow bulk single crystals but only form film on the surface of BaFe 2 As 2 crystal under normal pressure. It is reasonable to infer that surface strain should play a key role in the formation of Ba 0.5 Cs 0.5 Fe 2 As 2 films. Thus, it is believed that element doping or substitution may be one of the most effective methods to obtain doped-Ba 0.5 Cs 0.5 Fe 2 As 2 bulk single crystals.
Type of Medium:
Online Resource
ISSN:
0953-2048
,
1361-6668
DOI:
10.1088/1361-6668/ac7dff
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2022
detail.hit.zdb_id:
1361475-7
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