Domain Wall Formula

2 m m h m 1 3 demagnetizing field.

Domain wall formula. The scattering of the electron by a domain wall in a nano wire is calculated perturbatively to the lowest order. Displaystyle j mathrm ex both of which tend to be as low as possible so as to be in a more favorable energetic state. Demagnetizing field governs the formation of the wall integral over all space and b µ 0 h m h d is determined by the volume and surface charge distributions m and e n m m q m 4 r.

The result is shown to agree with the result of the linear response theory if the equilibrium is assumed in the four terminal case. The area of the hysteresis loop is the energy dissipated during magnetization demagnetization reverse magnetization ljxuh uhpryhg gxh wr frs uljkw uhvwulfwlrqv. The resistance is calculated by use of landauer s formula.

The result is shown to agree with the result of the linear response theoryif the equilibrium is assumed in the four terminal case. Therefore a domain wall requires extra energy called the domain wall energy which is proportional to the area of the wall. The resistance is calculated by use of landauer s formula.

The energy of a domain wall is simply the difference between the magnetic moments before and after the domain wall was created. Thus the net amount that the energy is reduced when a domain splits is equal to the difference between the magnetic field energy saved and the additional energy required to create the domain wall. The domain wall motion and hence contribute to coercivity.

The scattering of the electron by a domain wall in a nano wire is calculated perturbatively to the lowest order. The scattering of the electron by a domain wall in a nano wire is calculated perturbatively to the lowest order. High coercivity yields large area of the hysteresis loop.