TY - JOUR

T1 - β-NMR studies of spin-lattice relaxation in glassy and layer-crystalline compounds

AU - Heitjans, P.

AU - Faber, W.

AU - Schirmer, A.

N1 - Funding Information: Part of the work summarized here was performed in various collaborations, especially with H. Ackermann, B. Bader, J.E. Fischer, P. Freilander, K. Meise-Gresch, W. MiJller-Warmuth and H.-J. St~Sckmann. The authors further thank W. Puin for helpful discussions, and A. Keppels and M. Braun for technical assistance. The hospitality of the Institut fiir Festkt~rperforschung of KFA Jiilich is gratefully acknowledged. This work was sponsored by the Bundesministerium fi~r Forschung und Technologie (03-HE2HAN).

PY - 1991/6/2

Y1 - 1991/6/2

N2 - The method of beta-radiation detected NMR (β-NMR), complementing and extending the potential of conventional NMR, and its experimental realization by the new β-NMR spectrometer at the research reactor of KFA Jülich are described with respect to spin-lattice relaxation (SLR) studies. Recent applications to oxide and electrolyte glasses and a crystalline layered compound are reviewed. It is shown that a deviation from single-exponential SLR is a signature of local disorder in the vicinity of the β-NMR probes. The temperature and, especially, the magnetic field (or frequency) dependence of the SLR rate allow one to trace various dynamic processes, such as thermally activated excitations of disorder modes, anomalous ionic diffusion, molecular motions below and above the glass transition, and low-dimensional diffusion.

AB - The method of beta-radiation detected NMR (β-NMR), complementing and extending the potential of conventional NMR, and its experimental realization by the new β-NMR spectrometer at the research reactor of KFA Jülich are described with respect to spin-lattice relaxation (SLR) studies. Recent applications to oxide and electrolyte glasses and a crystalline layered compound are reviewed. It is shown that a deviation from single-exponential SLR is a signature of local disorder in the vicinity of the β-NMR probes. The temperature and, especially, the magnetic field (or frequency) dependence of the SLR rate allow one to trace various dynamic processes, such as thermally activated excitations of disorder modes, anomalous ionic diffusion, molecular motions below and above the glass transition, and low-dimensional diffusion.

UR - http://www.scopus.com/inward/record.url?scp=0026413784&partnerID=8YFLogxK

U2 - 10.1016/0022-3093(91)90723-J

DO - 10.1016/0022-3093(91)90723-J

M3 - Article

AN - SCOPUS:0026413784

VL - 131-133

SP - 1053

EP - 1062

JO - Journal of non-crystalline solids

JF - Journal of non-crystalline solids

SN - 0022-3093

IS - PART 2

ER -