The importance of paramagnetic impurities to the nuclear magnetic resonance relaxation of ion-conducting glasses.
Paramagnetic impurities have been shown to affect the 7Li nuclear magnetic resonance relaxation rates in cation-conducting glasses, and wrong data may then be extracted from the experiments. Frequency- and temperature-dependent T(-1)1 studies of lithium borate and thioborate glasses revealed that iron impurities cause frequency-independent relaxation and "shoulders" of the low-temperature slopes in high fields, whereas manganese produces enhanced relaxation peaks. The results of the T(-1)1 (and some T(-1)1p and T(-1)2) measurements are discussed.
Grüne
M
M
Institut für Physikalische Chemie der Westfälischen Wilhelms-Universität, Münster, Germany.
Müller-Warmuth
W
W
D001881:Borates / Q000737:chemistry; D002412:Cations; D004553:Electric Conductivity; D005898:Glass / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D018020:Lithium Compounds / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D008280:Magnetics; D013696:Temperature
D001881:Borates; D002412:Cations; D018020:Lithium Compounds; D007501:Iron; C021051:lithium borate