Co2+ spin-lattice relaxation narrowing of 19F NMR in KCoF3 |
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| Authors: | RD Hogg SP Vernon V Jaccarino |
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| Institution: | Physics Department, University of California Santa Barbara, California 93106, USA |
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| Abstract: | The temperature dependence of the 19F NMR linewidth ΔH in KCoF3 has been measured over the entire paramagnetic solid state region. The dramatic decrease in the hyperfine-broadened, exchange narrowed ΔH that occurs above 200 K is interpreted as arising from fast Co2+ single-ion, spin-lattice relaxation. A model theory of the temperature dependence of ΔH is given which incorporates the interplay of exchange and spin lattice relaxation effects on the decay of the spin autocorrelation function. |
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