Anisotropy of superconducting MgB2 as seen in electron spin resonance and magnetization data

F. Simon, A. Janossy, T. Feher +8

We have observed the conduction electron spin resonance (CESR) in fine powders of MgB2 both in the superconducting and normal states. The Pauli susceptibility is chi_s=2.0*10^{-5}…