Nuclear orientation studies of Ag hyperfine fields in Fe/Ag multilayers

Abstract

This paper reports on a low-temperature nuclear orientation (LTNO) study of Fe/Ag multilayers [Fe( x ML)/Ag( y ML)] 20 with ( x, y ) values of (9, 3), (18, 3) and (10, 5). The samples were prepared by molecular beam epitaxy (MBE) and the quality of the multilayers was checked by X-ray diffraction. The γ-ray anisotropy of the neutron activated 110 m Ag was measured as a function of the applied magnetic field. It was found that, in low external applied fields, the induced Ag hyperfine fields are directed out of the plane of the multilayer.