Conduction electron spin-lattice relaxation time in the MgB2 superconductor

Abstract

The spin-lattice relaxation time, $T_1$, of conduction electrons is measured as a function of temperature and magnetic field in MgB${}_2$. 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 $T_1$ below $T_c$ at 0.32 T allows to disentangle contributions from the two Fermi surfaces of MgB${}_2$ as this field restores normal state on the Fermi surface part with $\pi$ symmetry only.

6 pages, 5 figures

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Cited by in corpus (2)

• Modulation frequency dependence of continuous-wave optically/electrically detected magnetic resonance
• Generalized Elliott-Yafet theory of electron spin relaxation in metals: the origin of the anomalous electron spin life-time in MgB2