Beta-NMR investigation of dynamic and structural properties of lithium borate glass

verfasst von

A. Schirmer, P. Heitjans, B. Bader, P. Freilander, H. J. Stockmann, H. Ackermann

Abstract

With the method of beta -radiation-detected nuclear magnetic resonance/relaxation ( beta -NMR) nuclear spin relaxation, resonance signals and reorientation in Li₂O.3B₂O₃ glass were investigated using the probe nuclei ⁸Li and ¹²B. The non-exponential relaxation found for both probes can be described by an exp(- square root t/T_1inh) law and is explained by inhomogeneous polarization averaging over the isolated nuclei. The temperature dependence of the corresponding relaxation rate T_1inh^-1 shows two regions of different characteristics: below 200 K the coupling to relaxation centres typical of glasses dominates the relaxation. Above room temperature the relaxation of ⁸Li and ¹²B is due to Li diffusion in the glass. Linewidth and nuclear spin reorientation measurement corroborate earlier results from ⁷Li and ¹¹B NMR on the electric field gradients at the respective probe sites.

Externe Organisation(en)

Philipps-Universität Marburg

Typ

Artikel

Journal

Journal of Physics: Condensed Matter

Band

3

Seiten

4323-4332

Anzahl der Seiten

10

ISSN

0953-8984

Publikationsdatum

1991

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Allgemeine Materialwissenschaften, Physik der kondensierten Materie

Elektronische Version(en)

https://doi.org/10.1088/0953-8984/3/24/002 (Zugang: Unbekannt)