Effect of ${\rm BaZrO}_{3}$ Inclusions on the Microwave Surface Impedance of YBCO Films in a Magnetic Field

2009 ◽  
Vol 19 (3) ◽  
pp. 2917-2920 ◽  
Author(s):  
N. Pompeo ◽  
R. Rogai ◽  
V. Galluzzi ◽  
A. Augieri ◽  
G. Celentano ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Surface Impedance ◽  
Ybco Films ◽  
Microwave Surface Impedance

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.

Nonlinear microwave surface impedance of YBCO films: latest results and present understanding

2002 ◽  
Vol 372-376 ◽  
pp. 462-468 ◽  
Author(s):  
D.E. Oates ◽  
M.A. Hein ◽  
P.J. Hirst ◽  
R.G. Humphreys ◽  
G. Koren ◽  
...  
Keyword(s):  
Surface Impedance ◽  
Ybco Films ◽  
Microwave Surface Impedance ◽  
Present Understanding

Microwave surface impedance of epitaxial YBCO films: Comparison of data with a two-band model

1994 ◽  
Vol 235-240 ◽  
pp. 1823-1824 ◽  
Author(s):  
S. Orbach-Werbig ◽  
A. Golubov ◽  
S. Hensen ◽  
G. Müller ◽  
H. Piel
Keyword(s):  
Surface Impedance ◽  
Band Model ◽  
Ybco Films ◽  
Microwave Surface Impedance ◽  
Two Band Model

Nonlinear surface impedance of YBCO films in a dc magnetic field

1996 ◽  
Vol 46 (S3) ◽  
pp. 1621-1622
Author(s):  
Menachem Tsindlekht ◽  
Michael Golosovsky ◽  
Dan Davidov ◽  
Arne F. Jacob
Keyword(s):  
Magnetic Field ◽  
Surface Impedance ◽  
Ybco Films ◽  
Dc Magnetic Field ◽  
Nonlinear Surface ◽  
Nonlinear Surface Impedance
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