528 citations · 2.1k across the 36 of their papers we have counts for
5 papers · 1 filter
Control of Domain Wall Position by Electrical Current in Structured Co/Ni Wire with Perpendicular Magnetic Anisotropy
Tomohiro Koyama, Gen Yamada, Hironobu Tanigawa +6
We report the direct observation of the current-driven domain wall (DW) motion by magnetic force microscopy in a structured Co/Ni wire with perpendicular magnetic anisotropy. The w…
Dynamical pinning of domain wall in magnetic nanowire induced by Walker breakdown
Hironobu Tanigawa, Tomohiro Koyama, Maciej Bartkowiak +4
Transmission probability of a domain wall through a magnetic nanowire is investigated as a function of the external magnetic field. Very intriguing phenomenon is found that the tra…
Switching magnetic vortex core by a single nanosecond current pulse
Keisuke Yamada, Shinya Kasai, Yoshinobu Nakatani +2
In a ferromagnetic nanodisk, the magnetization tends to swirl around in the plane of the disk and can point either up or down at the center of this magnetic vortex. This binary sta…
Probing the spin polarization of current by soft X-ray imaging of current-induced magnetic vortex dynamics
Shinya Kasai, Peter Fischer, Mi-Young Im +5
Time-resolved soft X-ray transmission microscopy is applied to image the current-induced resonant dynamics of the magnetic vortex core realized in a micronsized Permalloy disk. The…
Bolometric Detection of Quantum Shot Noise in Coupled Mesoscopic Systems
Masayuki Hashisaka, Yoshiaki Yamauchi, Shuji Nakamura +3
We present a new scheme to detect the quantum shot noise in coupled mesoscopic systems. By applying the noise thermometry to the capacitively coupled quantum point contacts (QPCs)…