5 papers · 1 filter
Degenerate ground state and anomalous flux hysteresis in an YBa2Cu3O7 grain boundary r.f. SQUID
C. H. Gardiner, R. A. M. Lee, J. C. Gallop +3
We report measurements of the flux hysteresis curves and trapped flux distribution in an YBa2Cu3O7 r.f. SQUID containing two closely spaced grain boundary Josephson junctions in pa…
Microwave intermodulation distortion of MgB2 thin films
G. Lamura, A. J. Purnell, L. F. Cohen +6
The two tone intermodulation arising in MgB2 thin films deposited in-situ by planar magnetron sputtering on sapphire substrates is studied. Samples are characterised using an open-…
Microwave Power, DC Magnetic Field, Frequency and Temperature Dependence of the Surface Resistance of MgB2
A. A. Zhukov, A. Purnell, Y. Miyoshi +13
The microwave power, dc magnetic field, frequency and temperature dependence of the surface resistance of MgB2 films and powder samples were studied. Sample quality is relatively e…
Temperature dependence of the microwave surface impedance measured on different kinds of MgB samples
A. A. Zhukov, L. F. Cohen, A. Purnell +11
In this paper we present the results of measurements of the microwave surface impedance of a powder sample and two films of MgB. One film has K and is not textured, th…
Microwave Surface Resistance in MgB2
A. A. Zhukov, K. Yates, G. K Perkins +8
Measurements of the temperature dependence of the surface resistance at 3 GHz of 100 micron size grains of MgB_2 separated powder are presented and discussed. The microwave surface…