Chin. Phys. Lett.  2015, Vol. 32 Issue (08): 087502    DOI: 10.1088/0256-307X/32/8/087502
RC-Circuit-Like Dynamic Characteristic of the Magnetic Domain Wall in Flat Ferromagnetic Nanowires
CHEN Cheng1, PIAO Hong-Guang1, SHIM Je-Ho2, PAN Li-Qing1, KIM Dong-Hyun2
1College of Science, China Three Gorges University, Yichang 443002
2Department of Physics, Chungbuk National University, Cheongju 361-763, South Korea
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CHEN Cheng, PIAO Hong-Guang, SHIM Je-Ho et al  2015 Chin. Phys. Lett. 32 087502
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Abstract We investigate the dynamic behavior of the magnetic domain wall under perpendicular magnetic field pulses in flat ferromagnetic nanowires using micromagnetic simulations. It is found that the perpendicular magnetic field pulse can trigger the magnetic domain wall motion, where all the field torques are kept on the plane of nanowire strip. The speed of magnetic domain walls faster than several hundreds of meters per second is predicted without the Walker breakdown for the perpendicular magnetic driving field stronger than 200 mT. Interestingly, the dynamic behavior of the moving magnetic domain wall driven by perpendicular magnetic field pulses is explained by charging- and discharging-like behaviors of an electrical RC-circuit model, where the charging and the discharging of magnetic charges on the nanowire planes are considered. The concept of the RC-model-like dynamic characteristic of the magnetic domain wall might be promising for the applications in spintronic functional devices based on the magnetic domain wall motion.
Received: 08 April 2015      Published: 02 September 2015
PACS:  75.60.Ch (Domain walls and domain structure)  
  75.70.Kw (Domain structure (including magnetic bubbles and vortices))  
  75.60.Jk (Magnetization reversal mechanisms)  
  75.78.-n (Magnetization dynamics)  
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CHEN Cheng
PIAO Hong-Guang
PAN Li-Qing
KIM Dong-Hyun
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