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Measuring the Spin-Lattice Relaxation Magnetic Field Dependence of Hyperpolarized [1-13C]pyruvate
Published on: September 13, 2019
Experimental evidence for the relaxation coupling of all longitudinal 7Li magnetization orders in the superionic
M C Paulus1, A Paulus2, P P M Schleker3
1Forschungszentrum Jülich GmbH, Institute for Energy and Climate Research (IEK-9), D-52425 Jülich, Germany; RWTH Aachen University, Institute for Technical and Macromolucular Chemistry (ITMC), D-52074 Aachen, Germany; Forschungszentrum Jülich GmbH, Helmholtz Institute Münster (HI-MS) - Ionics in Energy Storage (IEK-12), 48149 Münster, Germany.
Abstract:
This contribution addresses the experimental proof of the relaxation coupling of the 7Li (I = 3/2) longitudinal magnetization orders in the solid-state electrolyte Li10GeP2S12 (LGPS). This effect was theoretically described by Korb and Petit in 1988 but has not yet been shown experimentally. In a 2D-T1/spin-alignment echo (SAE) experiment, the inverse Laplace transformation of the spectral component over two time dimensions revealed the asymmetric course of the spin-lattice relaxation following from the coupling of all longitudinal orders. These observations were supported by Multi-quantum-filter experiments and by simulations of the 2D-T1/SAE experiment with a lithium spin system. Since the asymmetric relaxation effects are directly dependent on the velocities and degrees of freedom of ion motion they could be used especially in fast Li-ion conductors as a separation tool for environments with different mobility processes.
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