Experimental evidence for the relaxation coupling of all longitudinal 7 Li magnetization orders in the superionic conductor Li 10 GeP 2 S 12 .

Autor: Paulus MC; Forschungszentrum 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. Electronic address: m.paulus@fz-juelich.de., Paulus A; Forschungszentrum Jülich GmbH, Institute for Energy and Climate Research (IEK-9), D-52425 Jülich, Germany; RWTH Aachen University, Institute for Physical Chemistry (IPC), D-52074 Aachen, Germany., Schleker PPM; Forschungszentrum Jülich GmbH, Institute for Energy and Climate Research (IEK-9), D-52425 Jülich, Germany; Max-Planck-Institute for Chemical Energy Conversions, Mülheim an der Ruhr, Germany., Jakes P; Forschungszentrum Jülich GmbH, Institute for Energy and Climate Research (IEK-9), D-52425 Jülich, Germany., Eichel RA; Forschungszentrum Jülich GmbH, Institute for Energy and Climate Research (IEK-9), D-52425 Jülich, Germany; RWTH Aachen University, Institute for Physical Chemistry (IPC), D-52074 Aachen, Germany., Heitjans P; Leibnitz University Hannover, Institute for Physical Chemistry and Electrochemistry, D-30167 Hannover, Germany., Granwehr J; Forschungszentrum 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.
Jazyk: angličtina
Zdroj: Journal of magnetic resonance (San Diego, Calif. : 1997) [J Magn Reson] 2019 Jun; Vol. 303, pp. 57-66. Date of Electronic Publication: 2019 Apr 11.
DOI: 10.1016/j.jmr.2019.04.006
Abstrakt: This contribution addresses the experimental proof of the relaxation coupling of the 7 Li (I = 3/2) longitudinal magnetization orders in the solid-state electrolyte Li 10 GeP 2 S 12 (LGPS). This effect was theoretically described by Korb and Petit in 1988 but has not yet been shown experimentally. In a 2D-T 1 /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-T 1 /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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Databáze: MEDLINE
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