113Cd and 133Cs NMR Study of Nucleus-Phonon Interactions in Linear-Chain Perovskite-Type CsCdBr3
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Resonance frequencies from the 113Cd and 133Cs nuclear magnetic resonance (NMR) spectra for the CsCdBr3 single crystal were measured at varying temperatures by the static NMR method. The temperature-dependent changes of these frequencies are related to the changing structural geometry of the CdBr64‒ units, which affects the environment of 133Cs. The spin-lattice relaxation rates (1/T1) for the 113Cd and 133Cs nuclei were measured in order to obtain detailed information about the dynamics of CsCdBr3 crystals. The dominant relaxation mechanisms for 113Cd and 133Cs nuclei are direct single-phonon and Raman spin-phonon processes, respectively.
Abstract
Resonance frequencies from the 113Cd and 133Cs nuclear magnetic resonance (NMR) spectra for the CsCdBr3 single crystal were measured at varying temperatures by the static NMR method. The temperature-dependent changes of these frequencies are related to the changing structural geometry of the CdBr64‒ units, which affects the environment of 133Cs. The spin-lattice relaxation rates (1/T1) for the 113Cd and 133Cs nuclei were measured in order to obtain detailed information about the dynamics of CsCdBr3 crystals. The dominant relaxation mechanisms for 113Cd and 133Cs nuclei are direct single-phonon and Raman spin-phonon processes, respectively.
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