Local Atomic Structure and Magnetism in Amorphous Fe$_{\mathrm{x}}$Si$_{\mathrm{1-x}}$ Thin Films
ORAL
Abstract
Amorphous FexSi1-x thin films exhibit a large enhancement in M compared to crystalline films with the same composition (0.45\textless $x$\textless 0.75). XMCD shows enhancement in both spin and orbital moments. Density functional theory (DFT) calculations reproduce this enhanced magnetization. DFT and EXAFS show the amorphous materials have decreased number of nearest neighbors and reduced number density relative to crystalline samples of same x, which leads to the enhanced moment.
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Authors
Frances Hellman
Physics Department, University of California, Berkeley
Department of Physics and Department of Materials Science and Engineering, University of California, Berkeley
University of California, Berkeley
Department of Physics, University of California, Berkeley
Yanning Zhang
University of California, Irvine
Department of Physics and Astronomy, University of California, Irvine, CA
Catherine Bordel
Physics Department, University of California, Berkeley, CA
Department of Physics, University of California, Berkeley
Kevin Stone
Materials Science Division, Lawrence Berkeley National Lab, Berkeley, CA
Catherine Jenkins
Advanced Light Source, Lawrence Berkeley National Lab, Berkeley, CA
David Smith
Arizona State University
Department of Physics, Arizona State University, Tempe, AZ
J. Hu
Department of Physics and Astronomy, University of California, Irvine, CA
Ruqian Wu
Univ of California - Irvine
Department of Physics and Astronomy, University of California, Irvine, CA
University of Calfornia Irvine
University of California, Irvine
Steve Heald
Argonne National Laboratory
Advanced Photon Source, Argonne National Laboratory, Argonne, IL
Jeff Kortright
Materials Science Division, Lawrence Berkeley National Lab, Berkeley, CA
