Abstract

A thermal energy atomic beam is diffracted from a crystalline surface as from a corrugated hard wall. For an atomic hydrogen beam and a crystalline surface containing magnetic ions, the magnitude of the crrugations is spin dependent. The magnetic part dependes on the relative size of the magnetic shell to the atomic radius. We calculate the scatterinf of a thermal energy atomic hydrogen beam form the (001) surface of MnO and find that the antiferromagnetic diffracted intensity is comparable to the specular intensity. Magnetic effects in the scattering from Eu++‐containing compounds are negligible. It is concluded that atomic beam scattering is potentially aan important new tool for studying the magnetic state of the surface of insulating crystals.

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