title: Submillimeter coils for stimulated-echo spectroscopy of a solid sodium ion conductor by nonselective excitation of MHz broad23Na quadrupolar satellite spectra.
abstract: In solids the detection of ionic motion covering the time range of milliseconds and longer is often accomplished using stimulated-echo spectroscopy. For spectral line widths much below or much above 1MHz nonselective or fully selective radio-frequency pulse excitation, respectively, is typically applied in such experiments. To enable the study of samples with quadrupolarly broadened satellite spectra featuring intermediate widths (in the lower MHz range) the present work exploits microcoils. Using such coils, stimulated-echo spectroscopy can be performed under conditions of nonselective excitation for instance with23Na as a nuclear probe. Nutation experiments carried out used to assess the coil performance. The impact of second-order quadrupolar interactions is studied using explicit density-matrix calculations. The applicability of the present approach is successfully tested for a sodium orthophosphate based solid ion conductor.
authors.affiliation: Fakultät Physik, Technische Universität Dortmund, 44221 Dortmund, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Jessat
authors.affiliation: Fakultät Physik, Technische Universität Dortmund, 44221 Dortmund, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Adjei-Acheamfour
authors.affiliation: Fakultät Physik, Technische Universität Dortmund, 44221 Dortmund, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Storek
authors.affiliation: Fakultät Physik, Technische Universität Dortmund, 44221 Dortmund, Germany. Electronic address: roland.bohmer@tu-dortmund.de.
authors.forename: R
authors.initials: R
authors.lastname: Böhmer
keywords: Microcoils; Quadrupolar nuclei; Solid electrolytes; Solid-state NMR; Stimulated spin echoes