A Ge pixel array detector (PAD) with 100 segments was used in fluorescence x-ray absorption spectroscopy (XAS) study, probing local structure of high temperature superconducting thin film single crystals. Independent monitoring of individual pixel outputs allows real-time inspection of interference of substrates which has long been a major source of systematic error. By optimizing grazing-incid...

Tunneling of virtual vortex-antivortex pairs across a superconducting film can be enhanced by sending pulses of electric current along the film. Thus, a thin wire made from such a film will function as a quantum switch (changing the magnetic flux enclosed by the device). We study this process numerically in a toroidal film (periodic boundary conditions in both directions) by using the dual desc...

A home-made flash evaporation attachment was used to prepare YBCO superconductor in the form of thin film on Si wafer substrate. Structural study was achieved by XRD analysis and electric resistance was measured by linear four-probe method down to 77 K. The whole-pattern fitting of Rietveld method was applied to verify the presence of the orthorhombic YBCO phase in the prepared bulk sample used...

This work compares two alternative methods of characterizing the nonlinearities in a 10 × 10 mm2 superconducting thin film. Both methods are based on measuring the intermodulation distortion in high temperature superconducting (HTS) films. The first method measures the unpatterned film by using a rutile loaded cavity operating at the TE011 mode. The second method is based on intermodulation mea...

In a recent paper [Phys. Rev. Lett. 97, 070401 (2006)] the transition rate of magnetic spin-flip of a neutral two-level atom trapped in the vicinity of a thick superconducting body was studied. In the present paper we will extend these considerations to a situation with an atom at various distances from a dielectric film. Rates for the corresponding electric dipole-flip transition will also be ...

In this work, nanostructured TiO2 and Cr-doped TiO2 thin films were deposited on glass substrate through sonochemical-chemical vapor deposition (CVD) method. The resulting thin films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-visible absorption spectroscopy, and photoluminescence spectroscopy techniques. The TiO2 thin film has nanocubic morphology and ...

thin film phthalocyanines(pc), incloding zinc, iron, and magnesium phthalocyani-nes, were prepared by vacuum deposition method. chronocoulometry was used to study the charge transfer reaction mechanism of ionic species through the thin films. the results obtained in chronocoulometric studies shows that the thin film phthalocyanines could operate via two mechanisms.the first mechanism metal pc t...

High quality c^-axis oriented thin and ultra-thin films have been grown in situ on (100) surfaces of ZrO?, SrTiO, and MgO. Sharp transitions were observed with T,,,,,, of 87-91 K for films thicker than 70 A. On atomically polished MgO substrates films as thin as 15 A revealed a full transition to superconductivity above 45.5 K. The critical current density at 77 K was found to be strongly depen...