Magnetic damping and spin polarization of highly ordered B2 Co{sub 2}FeAl thin films

Journal Article · Thu Aug 21 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4893235· OSTI ID:22314301

Cui, Yishen ^[1]; Lu, Jiwei ^[2]; Schäfer, Sebastian; Khodadadi, Behrouz; Mewes, Tim ^[3]; Osofsky, Mike ^[4]; Wolf, Stuart A. ^[1]

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1. Department of Physics, University of Virginia, Charlottesville, Virginia 22904 (United States)
2. Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904 (United States)
3. Department of Physics and Astronomy, University of Alabama, Tuscaloosa, Alabama 35487 (United States)
4. Naval Research Laboratory, Washington, DC 20375 (United States)

Epitaxial Co{sub 2}FeAl films were synthesized using the Biased Target Ion Beam Deposition technique. Post annealing yielded Co{sub 2}FeAl films with an improved B2 chemical ordering. Both the magnetization and the Gilbert damping parameter were reduced with increased B2 ordering. A low damping parameter, ∼0.002, was attained in B2 ordered Co{sub 2}FeAl films without the presence of the L2{sub 1} Heusler phase, which suggests that the B2 structure is sufficient for providing low damping in Co{sub 2}FeAl. The spin polarization was ∼53% and was insensitive to the chemical ordering.

• OSTI ID: 22314301
• Journal Information: Journal of Applied Physics, Vol. 116, Issue 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANNEALING
DAMPING
DEPOSITION
EPITAXY
ION BEAMS
MAGNETIZATION
SPIN ORIENTATION
THIN FILMS
YIELDS