Microwave reflectivity of the HTS oblique plate in a waveguide

Microwave bulk properties of melt-textured high-TCYBa2Cu3O7 superconductors

“…In order to remove the damaged surface layer, the sample was polished after cutting. The measurements were carried out at T = 77 K (the integral levitation force and field mapping measurements), in the temperature range T = 77-130 K (the microwave absorption measurements using the grazing incidence reflectivity technique [2][3][4] at frequency f = 41 GHz) and at 300 K (the SWR measurements using the same technique). The dimensions of the sample testing area, determined by dimensions of the inclined open ended waveguide window, is short-circuited by the sample surface, are 15 × 5.2 mm 2 (figure 1(a)), therefore the results are averaged over this area.…”

“…Recently [2], we have reported on the results of the measurements of microwave (MW) absorption on the top, bottom and sides of bulk melt-textured YBa 2 Cu 3 O 7−δ at T = 77 and 300 K. Based on these results, we have arrived at the conclusion on correlation of the measurement results in the superconducting (S) and normal (N) states. The grazing incidence microwave reflectivity technique has been used for the above mentioned measurements [3,4] (the microwave waveguide section is shown in figure 1(a)).…”