Solid state NMR free induction decay in the presence of vacancy diffusion期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Solid state NMR free induction decay in the presence of vacancy diffusion

Affiliation:	1. Sao Carlos Institute of Chemistry, University of Sao Paulo, Av. Trabalhador sao-carlense 400, CEP 13566-590, Caixa Postal 780, Sao Carlos, SP, Brazil;2. Brazilian Corporation for Agricultural Research, Embrapa Instrumentation, Rua XV de Novembro 1452, CEP 13560-970, Caixa Postal 741, Sao Carlos, SP, Brazil;3. Sao Carlos Institute of Physics, University of Sao Paulo, Av. Trabalhador sao-carlense 400, CEP 13566-590, Caixa Postal 369, Sao Carlos, SP, Brazil;4. Superior College of Agriculture “Luiz de Queiroz”, University of Sao Paulo, Av. Padua Dias 11, CEP 13418-900, Caixa Postal 9, Piracicaba, SP, Brazil

Abstract:	A theoretical calculation of the NMR free induction decay (FID) of spins in a periodic lattice is given where the spin-spin interaction is dipolar and where account is taken of vacancy motion. The expansion of the FID to any order is exact which allows for the inclusion of effects arising from nearest neighbor and next nearest neighbor (τ_NN and τ_NNN) hopping times. It is shown that expansion of the FID to terms of order t⁴ allows for the separate determination of τ_NN and τ_NNN.

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