Features of Long YBCO Josephson Junctions Fabricated by Preliminary Topology Mask

THz Properties of Long YBaCuO Bicrystal Josephson Junction Studied with a Cold-Electron Bolometer

“…We observe field dependent steps, characteristic to the travelling wave regime in a long Josephson junction. It should be noted that in difference with Nb junctions [38], for YBCO structures, due to larger damping, it is rather difficult to distinguish between various step types, such as displaced linear slopes, Fiske steps and velocity matching (VM) steps [50,51]. The separate peaks, repeated at the same frequency for all magnetic fields, are attributed to overlapping responses between different harmonics of antennas of YBCO oscillator and CEBs array.…”

“…The separate peaks, repeated at the same frequency for all magnetic fields, are attributed to overlapping responses between different harmonics of antennas of YBCO oscillator and CEBs array. The AFC of the YBCO antenna has recently been measured in [51] from the height of Shapiro step in the frequency range from 240 to 350 GHz with the same BWO as a radiation source. The maximum response has been observed from 250 to 280 GHz, which corresponds to the first harmonics of the YBCO JJ dipole antenna.…”

О возможности изготовления мостиков YBCO с совершенной поверхностью, критической температурой более 88 K и плотностью критического тока до 5·10-=SUP=-6-=/SUP=- A/cm-=SUP=-2-=/SUP=-

“…В процессе разработки метода задающей маски (ЗМ) мы обнаружили, что вблизи границы сверхпроводящей и изолирующей областей структуры может формироваться свободная от преципитатов область гладкой пленки YBCO (ОГП) [7]. Поэтому изготовление элементов планарных структур методом ЗМ может, например, поз-волить селективно удалить из сверхпроводящего моста крупные прецепитаты и поры, оставив мелкие дефекты, образующие центры пининга, и таким образом способствовать решению важного вопроса о влиянии дефектов различных типов на электрофизические параметры пленок YBCO.…”

YBaCuO Josephson generators fabricated by preliminary topology masks

“…It is well known that the properties of thin YBCO films are very sensitive to the processes of formation of planar structures. New technology of preliminary mask (PM) with CeO 2 buffer layer, which determines the necessary topology of the structure directly during the growth of the YBCO film has been developed [2][3][4]. The exclusion of the etching operation of the YBCO film from the technological process is important for structures with weak links, where the film is most sensitive to possible destructive factors.…”

“…The exclusion of the etching operation of the YBCO film from the technological process is important for structures with weak links, where the film is most sensitive to possible destructive factors. The PM method has been successfully used to create Josephson junctions on a bicrystal YSZ substrate with a sublayer of epitaxial cerium dioxide CeO 2 [2,4].…”