Critical state and low-field electrodynamics in LaO<sub>0.85</sub>F<sub>0.15</sub>FeAs superconductor polycrystals
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Date
2015
Authors
Yarman, Nuh Tolga
Kholmetskii, A. L.
Mashlan, M.
Yarman, T.
Aldushchenkov, A. V.
Okunev, I. S.
Makhnach, L. V.
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Publisher
Pleiades Publishing inc
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Abstract
The penetration of a weak magnetic field into LaO0.85F0.15FeAs polycrystalline superconductors is investigated using two mutually complementing techniques: measurement of the higher harmonics of nonlinear magnetization and the current-voltage characteristics. The dependences of the critical current density and resistivity on the temperature and magnetic field strength are determined. The results confirm the theory of the critical state in the low-field electrodynamics of a Josephson medium. The universality of this theoretical concept is demonstrated for a new class of ceramic superconductors.
Description
Yarman, Tolga/0000-0003-3209-2264
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Turkish CoHE Thesis Center URL
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Citation
0
WoS Q
Q4
Scopus Q
Q3
Source
Volume
120
Issue
6
Start Page
1034
End Page
1040