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Lock-in transition in layered superconductors

✍ Scribed by F. Steinmeyer; R. Kleiner; P. Müller; K. Winzer

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
148 KB
Volume
194-196
Category
Article
ISSN
0921-4526

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✦ Synopsis

We have studied the equilibrium vortex state of various layered superconductors by torque magnetometry. From the angle dependence of the torque the anisotropy of the magnetic penetration depth y = L_L -/ LII is determined. In T12Ca2Ba2Cu3010 and Bi2Sr2CaCthO 8 we find extreme values up to y = 900. At field orientations close to parallel to the layers a double peak of the torque appears as a fingerprint of the vortex lock-in transition. In the locked state we observe ideal screening of the field component perpendicular to the planes.

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