Vortex dynamics in BSCCO(2212) with Lorentz Microscopy
β Scribed by Akira Tonomura
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 316 KB
- Volume
- 235-240
- Category
- Article
- ISSN
- 0921-4534
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We present measurements of the effective surface impedance changes due to a static magnetic field, DZΓ°H ; T Γ ΒΌ DRΓ°H ; T ΓΓΎ iDX Γ°H; T Γ, in a Tl-2212 thin film with T c > 103 K, grown on a CeO 2 buffered sapphire substrate. Measurements were performed through a dielectric resonator operating at 47.7
The first order melting transition (FOT) in vortex matter of clean Bi 2 Sr 2 CaCu 2 O 8 crystals, is identified by a discontinuity in the reversible magnetization, which extends to the low temperature (irreversible) regime in the form of a jump in the energy barrier vs. current, UΓ°J Γ, variation. He
VSM magnetic hysteresis measurements are correlated with TEM studies of planar dislocation networks for a number of 2212-BSCCO crystals in the as-grown state and in high temperature oxygen and vacuum annealed samples. Anomalous magnetic features at finite fields are associated with a locking of the