Abstract
The proton nuclear magnetic resonance (T1, T2, linewidth) ismeasured for lanthanum hydrides LaHx (2.0⩽x⩽3.0)at temperatures between 4 K and 300 K and Larmor frequencies of300 MHz and 50 MHz. In addition to the resonance line narrowing andthe increase of the spin-lattice relaxation rate for temperaturesabove 200 K, originating from the well established type of thermallyactivated proton hopping motion in lanthanum hydrides, alow-temperature motion-induced relaxation anomaly is derived fortemperatures below 40 K. Thus the Korringa relaxation contributionin metallic LaH2.0 is most reliably separated in the40-200 K temperature range.
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