Measurements of surface resistance of grain-aligned bulk material as a function of DC magnetic field; weak link study

1993 ◽  
Vol 3 (1) ◽  
pp. 1432-1434 ◽  
Author(s):  
J. Wosik ◽  
L.M. Xie ◽  
J. Halbritter ◽  
R. Chau ◽  
A. Samaan ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Surface Resistance ◽  
Weak Link ◽  
Bulk Material ◽  
Dc Magnetic Field

Effect of the Weak Links on the Surface Resistance of YBa2Cu3Ox Bulk Material

1992 ◽  
Vol 275 ◽  
Author(s):  
J. Wosik ◽  
L. M. Xie ◽  
J. Halbritter ◽  
R. Chau ◽  
A. Samaan ◽  
...  
Keyword(s):  
Surface Resistance ◽  
Weak Link ◽  
Bulk Material ◽  
Weak Links ◽  
Wave Surface ◽  
Critical Fields ◽  
High Quality ◽  
Dc Magnetic Field ◽  
Replacement Method ◽  
Field Temperature

ABSTRACTDc magnetic field, temperature, and magnetic history dependencies of the millimeter-wave surface resistance have been measured in high quality grain-aligned and in polycrystalline YBa2Cu3Ox bulk material. The measurements were carried at 75 GHz using the endplate of the cavity replacement method. The data is interpreted in terms of the presence of intra- and inter-grain types of weak links. The values of characteristic critical fields of the bulk and the weak link junctions are determined and discussed.

Dependence of Surface Resistance in HTS Thin Films on a DC Magnetic Field

2005 ◽  
Vol 15 (2) ◽  
pp. 3692-3695 ◽  
Author(s):  
A. Saito ◽  
M. Shirakawa ◽  
K. Kitamura ◽  
Y. Noguchi ◽  
M. Mukaida ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Thin Films ◽  
Surface Resistance ◽  
Dc Magnetic Field

EFFECTS OF A MAGNETIC FIELD ON THE MICROWAVE SURFACE IMPEDANCE OF Bi2Sr2CaCu2O8-x SINGLE CRYSTALS

2003 ◽  
Vol 17 (04n06) ◽  
pp. 922-928
Author(s):  
E. SILVA ◽  
R. ROGAI ◽  
R. MARCON ◽  
S. SARTI ◽  
R. FASTAMPA ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Surface Impedance ◽  
Surface Resistance ◽  
Vortex Motion ◽  
Fixed Temperature ◽  
Microwave Surface Impedance ◽  
Motion Models ◽  
Dc Magnetic Field ◽  
Surface Reactance ◽  
Sudden Decrease

We present measurements of the field-induced change of the microwave surface impedance in optimally doped Bi 2 Sr 2 CaCu 2 O 8-x crystals. Measurements are taken with microwave fields in the (a,b) planes. A moderate (< 0.7 T) dc magnetic field is applied normal to the (a,b) planes. Measurements are taken for temperatures above 70 K. At fixed temperature, with increasing field the surface resistance presents a sharp onset at low fields, a steep rise then a plateau or a peak, followed by a second, slower rise with the field. The surface reactance presents similarly a steep raise at low fields above the onset, then a sudden decrease. We discuss the applicability of commonly established vortex motion models to the observed response, and we find that substantial inconsistencies emerge. Possible influences of the layered nature on the vortex response are investigated.

Temperature and dc magnetic field dependence of the surface resistance in HTS films

2005 ◽  
Vol 426-431 ◽  
pp. 1606-1610 ◽  
Author(s):  
A. Saito ◽  
M. Shirakawa ◽  
K. Kitamura ◽  
Y. Noguchi ◽  
M. Mukaida ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Dependence ◽  
Surface Resistance ◽  
Magnetic Field Dependence ◽  
Dc Magnetic Field ◽  
Hts Films

Intrinsic Surface Resistance of YBCO Thin Films Under DC Magnetic Field

2011 ◽  
Vol 21 (3) ◽  
pp. 587-590 ◽  
Author(s):  
K. Nakagawa ◽  
T. Honma ◽  
K. Takeda ◽  
S. Ono ◽  
H. Kai ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Thin Films ◽  
Surface Resistance ◽  
Dc Magnetic Field ◽  
Ybco Thin Films
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