@article{ba0393526fef42f88f2933021111ec67,
title = "Giant Anisotropy of Gilbert Damping in Epitaxial CoFe Films",
abstract = "Tailoring Gilbert damping of metallic ferromagnetic thin films is one of the central interests in spintronics applications. Here we report a giant Gilbert damping anisotropy in epitaxial Co50Fe50 thin films with a maximum-minimum damping ratio of 400%, determined by broadband spin-torque ferromagnetic resonance as well as inductive ferromagnetic resonance. We conclude that the origin of this damping anisotropy is the variation of the spin orbit coupling for different magnetization orientations in the cubic lattice, which is further corroborated from the magnitude of the anisotropic magnetoresistance in Co50Fe50.",
author = "Yi Li and Fanlong Zeng and Zhang, {Steven S.L.} and Hyeondeok Shin and Hilal Saglam and Vedat Karakas and Ozhan Ozatay and Pearson, {John E.} and Heinonen, {Olle G.} and Yizheng Wu and Axel Hoffmann and Wei Zhang",
note = "Funding Information: We are grateful for fruitful discussions with Bret Heinrich. W.{\^a}€‰Z. acknowledges support from the U.S. National Science Foundation under Grant No.{\^A} DMR-1808892, Michigan Space Grant Consortium, and DOE Visiting Faculty Program. Work at Argonne, including transport measurements and theoretical modeling, was supported by the U.S. Department of Energy, Office of Science, Materials Science and Engineering Division, and H.{\^a}€‰S. (first-principles calculations) acknowledges its Computational Materials Sciences Program{\^a}€{\texttrademark}s Center for Predictive Simulation of Functional Materials, the Innovative and Novel Computational Impact on Theory and Experiment (INCITE) Program, and the Argonne Leadership Computing Facility, a U.S. DOE facility under Contract No.{\^A} DE-AC02-06CH11357. Work at Fudan, including thin film growth and fabrication, was supported by the National Key Basic Research Program (2015CB921401), National Key Research and Development Program (2016YFA0300703), NSFC (11734006,11474066,11434003), and the Program of Shanghai Academic Research Leader (17XD1400400) of China. O.{\^a}€‰O. and V.{\^a}€‰K. acknowledge support from Bogazici University Research Fund (17B03D3), TUBITAK 2214/A, and the U.S. Department of State Fulbright Visiting Scholar Program. Funding Information: We are grateful for fruitful discussions with Bret Heinrich. W. Z. acknowledges support from the U.S. National Science Foundation under Grant No. DMR-1808892, Michigan Space Grant Consortium, and DOE Visiting Faculty Program. Work at Argonne, including transport measurements and theoretical modeling, was supported by the U.S. Department of Energy, Office of Science, Materials Science and Engineering Division, and H. S. (first-principles calculations) acknowledges its Computational Materials Sciences Program{\textquoteright}s Center for Predictive Simulation of Functional Materials, the Innovative and Novel Computational Impact on Theory and Experiment (INCITE) Program, and the Argonne Leadership Computing Facility, a U.S. DOE facility under Contract No. DE-AC02-06CH11357. Work at Fudan, including thin film growth and fabrication, was supported by the National Key Basic Research Program (2015CB921401), National Key Research and Development Program (2016YFA0300703), NSFC (11734006,11474066,11434003), and the Program of Shanghai Academic Research Leader (17XD1400400) of China. O. O. and V. K. acknowledge support from Bogazici University Research Fund (17B03D3), TUBITAK 2214/A, and the U.S. Department of State Fulbright Visiting Scholar Program. Publisher Copyright: {\textcopyright} 2019 American Physical Society.",
year = "2019",
month = mar,
day = "21",
doi = "10.1103/PhysRevLett.122.117203",
language = "English (US)",
volume = "122",
journal = "Physical review letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "11",
}