title: Solid state field-cycling NMR relaxometry: instrumental improvements and new applications.
abstract: The paper reviews recent progress in field cycling (FC) NMR instrumentation and its application to solid state physics. Special emphasis is put on our own work during the last 15years on instrumentation, theory and applications. As far as instrumentation is concerned we report on our development of two types of electronical FC relaxometers, a mechanical FC relaxometer and a combination of FC and one-dimensional microimaging. Progress has been achieved with respect to several parameters such as the accessible field and temperature range as well as the incorporation of sample spinning. Since an appropriate analysis of FC data requires a careful consideration of relaxation theory, we include a theory section discussing the most relevant aspects of relaxation in solids which are related to residual dipolar and quadrupolar interactions. The most important limitations of relaxation theory are also discussed. With improved instrumentation and with the help of relaxation theory we get access to interesting new applications such as ionic motion in solid electrolytes, structure determination in molecular crystals, ultraslow polymer dynamics and rotational resonance phenomena.
authors.affiliation: Institut für Festkörperphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany. Electronic address: fujara@physik.tu-darmstadt.de.
authors.forename: Franz
authors.initials: F
authors.lastname: Fujara
authors.affiliation: Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Sloneczna 54, PL-10-710 Olsztyn, Poland.
authors.forename: Danuta
authors.initials: D
authors.lastname: Kruk
authors.affiliation: Institut für Festkörperphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
authors.forename: Alexei F
authors.initials: AF
authors.lastname: Privalov
mesh_terms: D000818:Animals; D006801:Humans; D019906:Nuclear Magnetic Resonance, Biomolecular / Q000295:instrumentation* / Q000379:methods*; D011108:Polymers / Q000737:chemistry*; D011506:Proteins / Q000737:chemistry*
chemical_list: D011108:Polymers; D011506:Proteins
keywords: Dynamical processes; Field cycling; Instrumentation; NMR; Relaxometry