Measurements of the temperature dependence of the surface resistance at 3 GHz of 100 micron size fragments of MgB 2 separated powder are presented and discussed. The microwave surface resistance data are compared to experimental results of Nb, Bi 2 Sr 2 CaCu 2 O 8+δ (BSCCO) and theoretical predictions of s-wave weak coupling electron-phonon theory (BCS).
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Zhukov et al. (2001) studied this question.
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