Enhanced hyperfine magnetic fields for face-centered tetragonal Fe(110) ultrathin films on vicinal Pd(110)
Abbreviated Journal Title
Phys. Rev. B
ENERGY ELECTRON-DIFFRACTION; FE FILMS; MOSSBAUER-SPECTROSCOPY; FCC FE; CIRCULAR-DICHROISM; FE/PD MULTILAYERS; SURFACE MAGNETISM; PALLADIUM-IRON; FE(001) FILMS; THIN-FILMS; Physics, Condensed Matter
The structure and hyperfine magnetic proper-ties of epitaxial Fe ultrathin films on a vicinal Pd(110) surface have been investigated by means of low-energy electron diffraction (LEED), reflection high-energy electron diffraction (RHEED) and Fe-57 conversion electron Mossbauer spectroscopy (CEMS). LEED and RHEED provide evidence for initial pseudomorphic film growth. The RHEED determination of the in-plane atomic distance versus Fe film thickness demonstrates the stabilization of the metastable fcc-like Fe structure on Pd(110). This interpretation is supported by in situ Fe-57 CEMS measurements which indicate an enhanced saturation hyperfine field of similar to 39 T for a 3-monolayers-thick Fe film at 25 K. This is the highest value ever measured for Fe on a metallic substrate. Our results suggest that ultrathin fcc-like (face-centered tetragonal) Fe films on Pd(110) are in a ferromagnetic high-moment state with an enhanced hyperfine field due to electronic 3d-4d hybridization at the Fe/Pd interface.
Physical Review B
"Enhanced hyperfine magnetic fields for face-centered tetragonal Fe(110) ultrathin films on vicinal Pd(110)" (2005). Faculty Bibliography 2000s. 5100.