1302.1248 (Munetaka Sasaki et al.)

Penetration of a magnetic wall into thin ferromagnetic electrodes of a
nano-contact spin valve    [PDF]

Munetaka Sasaki, Susumu Tanaka, Yousuke Norizuki, Katsuyoshi Matsushita, Jun Sato, Hiroshi Imamura

We theoretically analyzed a magnetic wall confined in a nano-contact spin valve paying special attention to the penetration of the magnetic wall into thin ferromagnetic electrodes. We showed that, compared with the Bloch wall, the penetration of the Neel wall is suppressed by increases of the demagnetization energy. We found the optimal conditions of the radius and height of the nano-contact to maximize the power of the current-induced oscillation of the magnetic wall. We also found that the thermal stability of the Bloch wall increases when the nano-contact's radius increases or height decreases.

View original: http://arxiv.org/abs/1302.1248