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![]() | Ailion, David Charles | Detection of slow modulation wave diffusion in incommensurate barium sodium niobate by 93Nb 2D exchange NMR | 93Nb two-dimensional (2D) exchange NMR was used to study ultraslow motions in incommensurate barium sodium niobate (BSN) in the temperature range 500 - 560 K. These 2D exchange data provide strong evidence for diffusionlike motion of the modulation wave in BSN. Such motions in BSN had been previousl... | NMR; Hahn spin-echo decay; Incommensurate systems. | 2001 |