Temperature Dependence of the Magnetic Excitations in Nickel

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Abstract
The spin-wave excitations for nickel have been measured at a series of temperatures between 4.2 and 715°K. It is found that the spin waves change very little in character even at 80° above the Curie point. A sudden decrease in the spin-wave intensity at about 80 meV, interpreted as the intersection of the spin-wave spectra with a continuum band of Stoner excitations, is also found to be quite temperature independent.