Abstract: A magnetic material for microwave, comprising a phase having garnet structure, said phase comprising a component represented by Formula I(A.sub.3-a Bi.sub.a)B.sub.x O.sub.y Formula Iwhere A represents a component comprising at least one element selected from yttrium (Y) and rare earth elements, B represents a component comprising Fe, a represents a number in the range of 0 to less than 2.00, x represents a number in the range of 4.76 to less than 5.00, and y represents a number satisfying an inequality 1.5(3+x).ltoreq.y.ltoreq.12.

Abstract: A thin-film conductor is made of (Sr.sub.1-y Ca.sub.y).sub.1-x CuO.sub.z, wherein 0.ltoreq.x.ltoreq.0.1 and 0.ltoreq.y.ltoreq.0.5, and z is approximately equal to or smaller than 2. In a method of fabricating the thin-film conductor, it is preferably to heat a substrate. A first atomic layer of metal including Sr or including Sr and Ca is formed on the heated substrate. A second atomic layer of oxide containing Cu is formed on the first atomic layer. A first atomic layer of metal including Sr or including Sr and Ca is formed on the second atomic layer. These steps are repeated to form a lamination of an alternation of the first atomic layers and the second atomic layers on the substrate.