Phys. Rev. Lett. 42, 1773 - 1776 (1979)Electron-Spin Relaxation by Tunneling States in β-Al2O3: Na |
PRL Celebrates 50 Years
This Week's Milestone Letters are from 1974: |
S. R. Kurtz and H. J. Stapleton
Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
Received 30 March 1979
Spin relaxation measurements on a color center in the conduction plane of β-Al2O3: Na reveal an exceptionally fast rate with an anomalous temperature and microwave frequency dependence. The data are quantitatively described by a mechanism involving the coupling of a color center to the phonon-induced relaxation of a nearby localized two-level tunneling state. The required density of such states is nearly the same as that used to explain the low-temperature properties of β-Al2O3: Na.
©1979 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v42/p1773
DOI: 10.1103/PhysRevLett.42.1773
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