Magnetism and structure of epitaxial face-centered tetragonal Fe thin films

Roldan Cuenya, Beatriz; Doi, Masaaki; Ruckert, T.; Keune, Werner; Steffl, T.

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Magnetism and structure of epitaxial face-centered tetragonal Fe thin films

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Roldan Cuenya, B., Doi, M., Ruckert, T., Keune, W., & Steffl, T. (2000). Magnetism and structure of epitaxial face-centered tetragonal Fe thin films. Journal of the Physical Society of Japan, 69(Suppl. A), 125-125.

Cite as: https://hdl.handle.net/21.11116/0000-0006-EC18-6

Abstract

The structural and magnetic properties of Fe films grown by molecular beam epitaxy on Cu₃Au(001) and on Pd(001), and of Fe films in a [Fe(15Å)/Pd(40Å)]₃₀ multilayer, have been determined by electron diffraction(RHEED, LEED), X-ray diffraction, ⁵⁷Fe Mössbauer spectroscopy (CEMS), or SQUID magnetometry. Very thin Fe films are found to have a tetragonally compressed fcc (fct) structure and an enhanced saturation hyperfine field relative to that of bulk bcc Fe. The Fe magnetization in the Fe/Pd multilayer is remarkably enhanced with respect to that of bulk bcc Fe. Our results demonstrate that thin fct Fe films in these systems are in a ferromagnetic high-moment state with an Fe atomic volume (or Wigner-Seitz radius) which is rather close to that of bulk bcc Fe due to lattice relaxation.