Observation of the Influence of Electron-Pair Spin Flips on Nuclear Thermal Relaxation
- 1 December 1970
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 2 (11), 4626-4631
- https://doi.org/10.1103/physrevb.2.4626
Abstract
We report measurements on the thermal relaxation rate of water-of-hydration protons in magnetically dilute ·24O:. The observed dependence of the proton relaxation rate on the angle between the applied magnetic field and the crystal symmetry axis exhibits a complicated structure which is shown to be consistent with that arising from processes in which a proton gives up its Zeeman energy to a pair of electrons, such that the Zeeman energy for the 3-spin system is conserved. These observations constitute direct evidence for the influence of electron-pair flips on proton thermal relaxation. Estimates made of the relative strength of such multiple-spin processes are shown to correspond to observed data.
Keywords
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