Vf. Masterov et al., MILLIMETER MICROWAVE STUDY OF THE SUPERCONDUCTING PROPERTIES OF THE CU-C SYSTEM, Physics of the solid state, 39(5), 1997, pp. 722-723
A study has been made of a cylindrical Cu-C powder sample operated as
a microwave antenna at 35 GHz in the 80-300-K temperature interval. Th
e efficiency of such an antenna is shown to increase nearly twofold fr
om room temperature to liquid nitrogen temperature, which is apparentl
y associated with a superconducting transition close to 80 K. (C) 1997
American Institute of Physics.