Sergey Savel'ev et al 2005 New J. Phys. 7 82 doi:10.1088/1367-2630/7/1/082
Experimentally realizable devices for domain wall motion control
Focus on Brownian Motion and Diffusion in the 21st CenturySergey Savel'ev1, Alexander Rakhmanov1,2 and Franco Nori1,3
Show affiliationsPart of Focus on Brownian Motion and Diffusion in the 21st Century
Magnetic domain walls (MDWs) can move when driven by an applied magnetic field. This motion is important for numerous devices, including magnetic recording read/write heads, transformers and magnetic sensors. A magnetic film, with a sawtooth profile, localizes MDWs in discrete positions at the narrowest parts of the film. We propose a controllable way to move these domain walls between these discrete locations by applying magnetic field pulses. In our proposal, each applied magnetic pulse can produce an increment or step-motion for an MDW. This could be used as a shift register. A similarly patterned magnetic film attached to a large magnetic element at one end of the film operates as an XOR logic gate. The asymmetric sawtooth profile can be used as a ratchet resulting in either oscillating or running MDW motion, when driven by an ac magnetic field. Near a threshold drive (bistable point) separating these two dynamical regimes (oscillating and running MDW), a weak signal encoded in very weak oscillations of the external magnetic field drastically changes the velocity spectrum, greatly amplifying the mixing harmonics. This effect can be used either to amplify or shift the frequency of a weak signal.
- PACS
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75.60.Ch Domain walls and domain structure
- Subjects
- Dates
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Issue 1 (March 2005)
Received 5 January 2005
Published 21 March 2005
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Experimentally realizable devices for domain wall motion control
Sergey Savel'ev et al 2005 New J. Phys. 7 82
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-
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-
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-
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-
Neural networks with transient state dynamics
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-
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R K Gupta et al 1992 J. Phys. G: Nucl. Part. Phys. 18 1533
-
Noise-free magnetoencephalography recordings of brain function
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-
Electron spin resonance of europium in silver chloride
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-
Periotest-a dynamic procedure for the diagnosis of the human periodontium
D Lukas and W Schulte 1990 Clin. Phys. Physiol. Meas. 11 65
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