Journal
CHINESE PHYSICS LETTERS
Volume 32, Issue 5, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0256-307X/32/5/057601
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Funding
- National Basic Research Program of China [2015CB921502]
- National Natural Science Foundation of China [11474184, 11174183]
- 111 Project [B13029]
- Natural Science Foundation of Shandong Province [JQ201201]
- Doctorate Foundation of Shandong Province [BS2013CL042]
- Young Scientists Fund of the National Natural Science Foundation of China [11204164]
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Co2MnSi thin films are made by magnetron sputtering onto MgO (001) substrates. The crystalline quality is improved by increasing depositing temperature and/or annealing temperature. The sample deposited at 550 degrees C and subsequently annealed at 550 degrees C (sample I) exhibits a pseudo-epitaxial growth with partially ordered L2(1) phase. Sample I shows a four-fold magnetic anisotropy, in addition to a relatively weak uniaxial anisotropy. The Gilbert damping factor of sample I is smaller than 0.001, much smaller than reported ones. The possible reasons responsible for the small Gilbert damping factor are discussed, including weak spin-orbit coupling, small density of states at Fermi level, and so on.
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