We report on spin coherence lifetime extension on Tm3+:YAG obtained through dynamically decoupling the thulium spins from their magnetic environment. The coherence lifetime reached with a Carr-Purcell-Meiboom-Gill sequence revealed a 450-fold extension [∼(230±30) ms] with respect to previously measured values. Comparison to a simple theoretical model allowed us to estimate the correlation time of the fluctuations of the ground level transition frequency to (172±30)μs at 1.7 K. For attaining efficient decoupling sequences, we developed a strategy inspired by the \emph{zero-first-order Zeeman} effect to minimize the large inhomogeneous broadening of the ground level spin transition.
Cite
@article{arxiv.1208.1622,
title = {Spin coherence lifetime extension in Tm$^{3+}$:YAG through dynamical decoupling},
author = {M. F. Pascual-Winter and R. -C. Tongning and T. Chanelière and J. -L. Le Gouët},
journal= {arXiv preprint arXiv:1208.1622},
year = {2014}
}