Angular-dependent magnetic torque in iron-pnictide BaFe2−xNixAs2
2017 ◽
Vol 31
(03)
◽
pp. 1750005
Keyword(s):
Angular-dependent torque measurements have been performed on the electron doped iron-pnictide superconductors BaFe[Formula: see text]NixAs2 with series of Ni concentrations. In the superconducting state, an irreversibility, as the evidence for the presence of vortex, is observed between the torque measured with increasing and decreasing angle. Our results in underdoped samples [Formula: see text] show that the irreversible torque signal survives up to a temperature [Formula: see text] well above the superconducting transition temperature [Formula: see text], suggesting the existence of superconducting vortices above [Formula: see text], which is likely to originate from superconducting fluctuations.
1985 ◽
Vol 54
(6)
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pp. 2257-2268
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1987 ◽
Vol 26
(Part 2, No. 5)
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pp. L820-L821
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1971 ◽
Vol 4
(6)
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pp. 669-678
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2017 ◽
Vol 220
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pp. 239-242
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1992 ◽
Vol 96
(2)
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pp. 455-460
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2016 ◽
Vol 2016
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pp. 1-7
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