The spin-lattice relaxation time, T1, of conduction electrons is measured as a function of temperature and magnetic field in Mg B2 in the normal and superconducting states. The method is based on the detection of the z component of the conduction electron magnetization under electron-spin-resonance conditions with amplitude-modulated microwave excitation. Measurement of T1 below Tc at 0.32 T allows us to disentangle contributions from the two Fermi surfaces of Mg B2, as this field restores the normal state on the part of the Fermi surface with π symmetry only.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - Jul 26 2007|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics