The AC Josephson effect and submillimeter wave mixing with a weak-link array of grain boundaries formed in YBCO film

1993 ◽  
Vol 3 (1) ◽  
pp. 2421-2425 ◽  
Author(s):  
T. Matsui ◽  
H. Ohta
Keyword(s):  
Grain Boundaries ◽  
Josephson Effect ◽  
Ybco Film ◽  
Weak Link ◽  
Submillimeter Wave ◽  
Wave Mixing

HARMONIC GENERATION AND SUBMILLIMETER WAVE MIXING WITH THE JOSEPHSON EFFECT

1969 ◽  
Vol 15 (4) ◽  
pp. 121-122 ◽  
Author(s):  
D. G. McDonald ◽  
V. E. Kose ◽  
K. M. Evenson ◽  
J. S. Wells ◽  
J. D. Cupp
Keyword(s):  
Harmonic Generation ◽  
Josephson Effect ◽  
Submillimeter Wave ◽  
Wave Mixing

Microstructure of artificial 45° [001] tilt grain boundaries in YBCO films grown on (001) MgO

1996 ◽  
Vol 54 ◽  
pp. 372-373
Author(s):  
Y. Huang ◽  
B.V. Vuchic ◽  
D.B. Buchholz ◽  
K.L. Merkle ◽  
R.P.H. Chang
Keyword(s):  
Grain Boundaries ◽  
Film Growth ◽  
Ybco Film ◽  
Weak Link ◽  
Ion Beam ◽  
Magnetic Field Measurement ◽  
X Ray Diffraction ◽  
Ybco Films ◽  
Potential Applications ◽  
Tilt Boundaries

It is well known that high-angle grain boundaries in YBa2Cu3O7−x (YBCO) show weak-link effects and behave as Josephson junctions. This kind of grain boundary junction (GBJ) has potential applications in magnetic field measurement and electronic devices. This work studies the microstructure of artificially made GBJs in YBCO films on (001) MgO and the mechanism of the boundary formation, with the goal to improve the GBJ quality and obtain a better understanding of the junctions’ transport properties.Ion-sputter-induced epitaxy is used to form YBCO films with isolated 45° [001] tilt grain boundaries. Prior to YBCO film growth the (001) MgO substrate is selectively sputtered by a low energy Ar ion beam. A portion of the substrate remains non-sputtered by protecting the surface with a patterned photoresist mask. After removing the mask, a YBCO film is grown on the substrate using pulsed organometallic molecular beam epitaxy (POMBE). Under suitable conditions single crystal YBCO c-axis films can be reproducibly obtained in both the sputtered and non-sputtered regions. The orientation between the films and the substrate has been examined by both x-ray diffraction and electron diffraction. The in-plane orientation relation is [110]YBCO//[100]MgO on the non-sputtered epitaxially polished MgO and [100]YBCO//[100]MgO on the sputtered MgO. Thus, 45° tilt boundaries are formed in the film at the boundary between the sputtered and non-sputtered substrate regions.

Weak Link Properties of YBa2Cu3O7−δ Thin Film Grain Boundaries

1990 ◽  
pp. 331-340 ◽  
Author(s):  
S. E. Russek ◽  
D. K. Lathrop ◽  
B. H. Moeckly ◽  
R. A. Buhrman ◽  
D. H. Shin ◽  
...  
Keyword(s):  
Thin Film ◽  
Grain Boundaries ◽  
Weak Link

scholarly journals Correction: Weak-link-free behaviour of high-angle YBa2Cu3O7–δ grain boundaries in high magnetic fields

Nature ◽  
1991 ◽  
Vol 349 (6306) ◽  
pp. 264-264 ◽  
Author(s):  
S. E. Babcock ◽  
X. Y. Cai ◽  
D. L. Kaiser ◽  
D. C. Larbalestier
Keyword(s):  
Magnetic Fields ◽  
Grain Boundaries ◽  
Weak Link ◽  
High Magnetic Fields ◽  
High Angle

Frequency Dependence of the ac Josephson Effect in Nb Point Contacts in the Submillimeter-Wave Region

1981 ◽  
Vol 20 (4) ◽  
pp. L257-L260 ◽  
Author(s):  
Takashi Noguchi ◽  
Seizo Morita ◽  
Syozo Imai ◽  
Yosihisa Takeuti ◽  
Nobuo Mikoshiba
Keyword(s):  
Frequency Dependence ◽  
Josephson Effect ◽  
Submillimeter Wave ◽  
Point Contacts ◽  
Wave Region

Observations and implications of grain boundary dislocation networks in high-angle YBa2Cu3O7−δ grain boundaries

1990 ◽  
Vol 5 (5) ◽  
pp. 919-928 ◽  
Author(s):  
S. E. Babcock ◽  
D. C. Larbalestier
Keyword(s):  
Grain Boundary ◽  
Grain Boundaries ◽  
Weak Link ◽  
Coincidence Site Lattice ◽  
Boundary Structure ◽  
High Angle ◽  
Grain Boundary Structure ◽  
Transmission Electron ◽  
Means Of Transmission ◽  
Regular Networks

Regular networks of localized grain boundary dislocations (GBDs) have been imaged by means of transmission electron microscopy in three different types of high-angle grain boundaries in YBa2Cu3O7-δ, implying that these boundaries possess ordered structures upon which a significant periodic strain field is superimposed. The occurrence of these GBD networks is shown to be consistent with the GBD/Structural Unit and Coincidence Site Lattice (CSL)/Near CSL descriptions for grain boundary structure. Thus, these dislocations appear to be intrinsic features of the boundary structure. The spacing of the observed GBDs ranged from ∼10 nm to ∼100 nm. These GBDs make the grain boundaries heterogeneous on a scale that approaches the coherence length and may contribute to their weak-link character by producing the “superconducting micro-bridge” microstructure which has been suggested on the basis of detailed electromagnetic measurements on similar samples.

scholarly journals Josephson effect in a weak link between borocarbides

2005 ◽  
Vol 31 (2) ◽  
pp. 137-138 ◽  
Author(s):  
Yu. A. Kolesnichenko ◽  
S. N. Shevchenko
Keyword(s):  
Josephson Effect ◽  
Weak Link

Josephson effect in superconductor/ferromagnet structures with a complex weak-link region

2010 ◽  
Vol 81 (21) ◽  
Author(s):  
T. Yu. Karminskaya ◽  
A. A. Golubov ◽  
M. Yu. Kupriyanov ◽  
A. S. Sidorenko
Keyword(s):  
Josephson Effect ◽  
Weak Link

scholarly journals Demonstration of Josephson effect submillimeter wave sources with increased power

1994 ◽  
Vol 64 (11) ◽  
pp. 1424-1426 ◽  
Author(s):  
Siyuan Han ◽  
Baokang Bi ◽  
Wenxing Zhang ◽  
J. E. Lukens
Keyword(s):  
Josephson Effect ◽  
Submillimeter Wave
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