UScholar Works
 
Filters: Journal Title: "IEEE Transactions on Magnetics" Collection: "ir_uspace"
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CreatorTitleDescriptionSubjectDate
1 Symko, Orest GeorgeCharacteristics of YBaCuO magnetic shieldsMagnetic shielding properties of YBaCuO tubes have been studied at temperatures of 77 K and 4 K. Shielding effectiveness was determined by measuring the magnetic field inside the tube in the presence of external magnetic fields. A high degree of shielding was achieved up to a critical external fie...YBaCuO magnetic shields; SQUID1991-03
2 Vardeny, Zeev Valentine; Symko, Orest GeorgeFemtosecond dynamics of quasi-particles in YBa2Cu3O7-δ superconductor filmsWe have studied the transient electronic response of YBa2Cu307-δ epitaxialy grown H T c superconductor thin films in the femtosecond time domain, using transient photoinduced reflectivity (AR) with 60 fsec time resolution. For temperatures T>Tc only a bolometric signal was observed with ARrO. For ...Femtosecond dynamics; YBa2Cu3O7-8; Transient electronic response; Transient optical response1991-03
3 Symko, Orest George; Vardeny, Zeev ValentineFemtosecond dynamics of quasi-particles in YBa2Cu3O7-δ superconductor filmsWe have studied the transient electronic response of YBa2Cu30y . 5 epitaxialy grown HTC superconductor thin films in the femtosecond time domain, using transient photoinduced reflectivity (∆R) with 60 fsec time resolution. For temperatures T>TC only a bolometric signal was observed with ∆R>0. F...Femtosecond dynamics; Superconductor films; YBCO films1991-03
4 Symko, Orest GeorgeHigh Tc rf-biased SQUIDResults are presented on the behavior of a simple rf-biased SQUID made out of YBa2Cu307. It consists of a fractured ceramic pellet stuck together at room temperature. This simple device is shielded by a high Tc tube and it shows the characteristic flux quantization behavior up to 77K. At 4.2K its ma...High Tc RF-biased SQUID1989-03
5 Symko, Orest GeorgeMulti-fluxon steps in long Josephson junctions and their application to oscillatorsStudies of long NbN Josephson junctions of the overlap type in the presence of an external magnetic field show constant voltage steps, of the Fiske type, and large voltage steps. The latter are attributed to multifluxon resonances within the cavity of the junction. The multifluxon steps correspond t...NbN; Multi-fluxon steps; Oscillators1991-03
6 Scarpulla, MichaelNew methodologies for measuring film thickness, coverage, and topographyWe describe how the techniques of X-ray reflectivity (XRR), electron spectroscopy for chemical analysis (ESCA), and atomic force microscopy (AFM) can be used to obtain the structural parameters-thickness, coverage, and topography-of thin films used on magnetic recording disks. We focus on ultra-thi...Atomic force microscopy; Electron spectroscopy for chemical analysis; X-ray reflectivity2000-01
7 Symko, Orest GeorgeNoise characteristics and instabilities of long Josephson junctionsIn a magnetic field, current biased long Josephson junctions exhibit the dynamics of fluxon motion which are affected by fluctuations. These consist of telegraph noise at voltage steps and instabilities due to chaotic behavior. Results on long junctions with McCumber number fic ranging from 10 to 10...Fluxon motion; Current biased; Instabilities; Telegraph noise; Perturbed sine-Gordon equation1989-03
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