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Microwave surface resistance of YB/sub a2/Cu/sub 3/O/sub 7-delta/

Conference · · IEEE Trans. Magn.; (United States)
OSTI ID:6087700
; ; ; ; ; ;
The magnetic field dependence of microwave surface resistance of both single crystals and sintered polycrystals of YB/sub a2/Cu/sub 3/O/sub 7-delta/ (YBCO) has been measured at 24 GHz. The resistance decreases below superconducting transition temperature and reaches constant residual resistance. The value is much lower for single crystals than for polycrystals. Furthermore polycrystals showed magnetoresistance at low field and one with hysteresis at high field which resembles the magnetization behavior of typical type II superconductor. The single crystal, however, showed smaller magnetoresistance. The magnetoresistance observed is proved to be an inherent phenomena to sintered polycrystal which is composed of grains and contains many voids.
Research Organization:
National Lab. for High Energy Physics, Oho, Tsukuba, Ibaraki (JP); Gunma Univ., Tenjin, Kiryu, Gunma (JP); Iwaki Meisei Univ., Iwaki, Fukushima (JP); NTT Transmission Systems Lab., Tokai, Ibaraki (JP)
OSTI ID:
6087700
Report Number(s):
CONF-880812-
Conference Information:
Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: 25:2
Country of Publication:
United States
Language:
English

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