LOCAL MAGNETIC STATES AND HYPERFINE INTERACTIONS IN FE TI MAGNETIC SUPERLATTICES/

Multilayer Fe/Ti films are synthesized by deposition in a Penning disc harge. Measurements are made of thhe static hysteresis loops and Mossb auer spectra on Fe-57 nuclei. The hyperfine magnetic field distributio n functions are calculated. It is established that the spontaneous mag netization of Fe/Ti magnetic superlattices undergoes very strong oscil lations as a function of the Ti layer thickness. Three groups of peaks are noted in the hyperfine field distribution functions, correspondin g to three nonequivalent states of the Fe ions, in one of which these ions do not have a characteristic magnetic moment, These results also agree with measurements of the temperature dependence of the magnetiza tion in weak magnetic fields. For some Ti interlayer thicknesses the s aturation magnetization scaled to the Fe content is much higher than t he saturation magnetization of bulk Fe. (C) 1997 American Institute of Physics.