SEARCH FOR NEW SUPERCONDUCTORS BY MAGNETOSENSITIVE MICROWAVE-ABSORPTION

We used the magnetosensitive microwave absorption (MMA) effect to sear ch for new superconductive materials. This effect is very sensitive to the superconductive phase quantity in the sample under test and can d etect very small quantities of this phase up to 10(-3)% of this in a s ample volume. As nonsuperconductors manifest MMA effect too, it is nec essary to find out the MMA peculiarities which call be attributed only to a superconductive phase. To solve the problem we considered peculi arities of MMA effect deduced experimentally in superconductors of typ e I, II as well as for the BTSC: and compared their properties with th ose in the materials with magnetic dipoles and the magnetoresistive ef fect in semiconductors. Thus we found the main peculiarities of the MM A effect the superconductive phase and observed them in some glasses e nriched with ions of Cu, Ni, Co, or Fe.