6533b82bfe1ef96bd128e2fd
RESEARCH PRODUCT
Transport properties of Bi2Sr2Ca2Cu3O10+δ Bicrystal Grain Boundary Josephson Junctions and SQUIDs
U. FreyP. HaibachK. ÜStünerGerhard JakobH. AdrianH. Meffertsubject
010302 applied physicsPhysicsJosephson effectCondensed matter physicsGeneral Physics and AstronomyEpitaxy01 natural scienceslaw.inventionSQUIDlaw[PHYS.HIST]Physics [physics]/Physics archives0103 physical sciencesGrain boundaryThin film010306 general physicsdescription
Josephson junctions and SQUIDs on 36.8° SrTiO 3 bicrystal substrates were prepared from epitaxial Bi 2 Sr 2 Ca 2 Cu 3 O 10+δ thin films with critical temperatures around 95K. The current-voltage characteristics are well described by the resistively and capacitively shunted junction model. I c R n products of 50μV at 77K and 0.7mV at 4.2K have been reached. The I c (B) dependence is symmetric to B = 0 with an I c suppression of 90% in the first minimum. Nevertheless it turns out, that the junctions are inhomogeneous on a μm scale. SQUID modulations observed at 78K indicate a flux-voltage transfer function of 2.7μV/Φ 0 at this temperature.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1996-04-01 |