Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 457, Issue -, Pages 52-56Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2018.02.031
Keywords
Spin transfer torque; Magnetic dynamic response; Negative permeability; Micromagnetics simulation
Funding
- Natural Science Foundation of China [61271039]
- International Scientific Collaboration Projects of Sichuan Province [2015HH0016]
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Due to the effect of spin transfer torque, negative imaginary parts of permeability (mu '' < 0) are reported in a ferromagnetic nanowire. It is found that negative mu '' values are resulted from the interaction of spin polarized conduction electrons with the spatially non-uniform distributed magnetic moments at both ends of nanowires. The results are well explained from the effect of spin transfer torque on the precession of magnetization under the excitation of both the pulsed magnetic field and static electric field. (C) 2018 Elsevier B.V. All rights reserved.
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