(Towards) Spin-polarized scanning tunneling microscopy of NiFe films on a chromium001
single crystal: Growth and electronic structure of Permalloy
(Towards) Spin-polarized scanning tunneling microscopy of NiFe films on a chromium001
single crystal: Growth and electronic structure of Permalloy
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Date
2005-05-10
Authors
Dreyer, M.
Lee, J.
Krafft, C.
Gomez, R.
Advisor
Citation
M. Dreyer, J. Lee, C. Krafft and R.D. Gomez*, “(Towards) Spin polarized STM of NiFe films on Cr(001) single crystal: growth and electronic structure”, Journal of Applied Physics 97, 2005, 10E703.
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Abstract
This paper shows spin-polarized tunneling on the terraces of antiferromagnetic chromiums001d.
Details on the morphological and chemical composition are shown as a function of various stages
of surface preparation, and protocols for obtaining Crs001d that reveal spin-polarized contrast are
reported. On the clean crystal the chromium surface state at the Fermi level could be observed. The
spin splitting of the state was measured by using an iron coated tungsten tip. A spin polarization of
10% was observed. The properties of NiFe grown on Crs001d measured using nonpolarized
tunneling spectroscopy are also reported. Monolayer thick permalloy grows in Volmer–Weber
mode, exhibiting pyramidal islands oriented along the chromium k110l direction. Spectroscopic data
reveal that NiFe alloying is preserved.