AI Article Synopsis
- Researchers directly measured the spinmotive force in Permalloy nanowires by using real-time voltage monitoring and correcting for other electrical effects.
- They discovered that while the speed of the domain wall changes nonlinearly with the magnetic field, the voltage produced increases in a linear manner.
- The voltage's sign flips when the direction of the wall's movement changes, and simulations support these findings, showing that the spinmotive force continues to scale with the magnetic field even when wall motion isn't related to consistent magnetization rotation.
Article Abstract
The spinmotive force associated with a moving domain wall is observed directly in Permalloy nanowires using real time voltage measurements with proper subtraction of the electromotive force. Whereas the wall velocity exhibits nonlinear dependence on magnetic field, the generated voltage increases linearly with the field. We show that the sign of the voltage reverses when the wall propagation direction is altered. Numerical simulations explain quantitatively these features of spinmotive force and indicate that it scales with the field even in a field range where the wall motion is no longer associated with periodic angular rotation of the wall magnetization.
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| http://dx.doi.org/10.1103/PhysRevLett.108.147202 | DOI Listing |
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