ZhETF, Vol. 146,
No. 3,
p. 563 (September 2014)
(English translation - JETP,
Vol. 119, No. 3,
p. 493,
September 2014
available online at www.springer.com
)
EFFECT OF VORTEX PINNING BY POINT DEFECTS ON THE LOWER CRITICAL FIELD IN LAYERED SUPERCONDUCTORS
Mikitik G.P.
Received: March 2, 2014
DOI: 10.7868/S0044451014090168
The lower critical field Hc1 in layered superconductors is calculated under the assumption that vortex pinning by point defects is strong in these materials. We consider the case of a purely electromagnetic coupling of vortex pancakes and the case of both the electromagnetic and Josephson couplings of the pancakes in a vortex line. In the latter case, singularities in the temperature dependence of Hc1 are predicted at certain characteristic temperatures.
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