IOP Publishing, Superconductor Science and Technology, 5(14), p. L13-L16
DOI: 10.1088/0953-2048/14/5/101
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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 resistance data is compared to experimental results of Nb, Bi_2Sr_2CaCu_2O_{8+δ} (BSCCO) and theoretical predictions of s-wave weak coupling electron-phonon theory (BCS). ; Comment: 4 pages, 2 figures; accepted in SUST