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23 April 2024

» arxiv » arxiv.0704.0466

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Conduction electron spin-lattice relaxation time in the MgB2 superconductor
F. Simon ; F. Murnyi ; T. Fehr ; A. Jnossy ; L. Forr ; C. Petrovic ; S.L. Bud’ko ; P.C. Canfield ;
Date:	3 Apr 2007
Subject:	cond-mat.supr-con (Superconductivity); cond-mat.str-el (Strongly Correlated Electrons)
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.
Source:	arXiv, arxiv.0704.0466
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