Abstract
Scientists at the Naval Research Laboratory have been using molecular beam epitaxy techniques to grow a variety of high quality magnetic transition metal (TM) films and superlattices having TM thicknesses in the 1–10 monolayer regime. The magnetic and structural properties of these samples have been studied with a wide variety of standard and spin-sensitive techniques, both in vacuo and, when suitably protected, in air. The magnetic behavior of the materials is strongly modified as the TM layers become ultrathin. This work is illustrated with examples involving ultrathin Fe layers on Ag(001), Fe/Ag(001) superlattices containing ultrathin Fe layers, and bcc Co on GaAs(110).
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