DW motion in Ring Nanowire

Fast Magnetic Domain-Wall Motion in a Ring-Shaped Nanowire Driven by a Voltage.

Jia-Mian Hu, Tiannan Yang, Kasra Momeni, Xiaoxing Cheng, Lei Chen, Shiming Lei, Shujun Zhang, Susan Trolier-McKinstry, Venkatraman Gopalan, Gregory P. Carman, Ce-Wen Nan, and Long-Qing Chen 
Nano Lett. 16, 2341 (2016)

Antiferromagnetic Skyrmions: Applied Current and Temperature

Static and Dynamical Properties of Antiferromagnetic Skyrmions in the Presence of Applied Current and Temperature.
Joseph Barker and Oleg A. Tretiakov
Phys. Rev. Lett. 116, 147203 (2016)

The spin texture of a $G$-type AFM Skyrmion. (a) Top view of the Skyrmion, white lines show contours of constant $n_z$. The radius is 2.1 nm. (b) Cross section of the Skyrmion. The core is not a single spin but a compensated structure combining the two sublattices.

Target skyrmion switching by current

Switching of a target skyrmion by a spin-polarized current. 
Yan Liu, Haifeng Du, Min Jia, and An Du 

Phys. Rev. B 91, 094425 (2015)

Topography of mz during the skyrmion polarity switching process. The insets on the lower right show mz in the disk plane. The insets on the upper right display the cutlines along the diameter through the disk center. (i) Variation of the Rs with simulation time.

 

Thermally assisted skyrmion motion

Thermally assisted current-driven skyrmion motion.
Roberto E. Troncoso, and Alvaro S. Núñez

Phys. Rev. B 89, 224403 (2014)

Effect of current on energy barrier for DW pinning

Electric Current Effect on the Energy Barrier of Magnetic DomainWall Depinning: Origin of the Quadratic Contribution.
Kab-Jin Kim, Jisu Ryu, Gi-Hong Gim, Jae-Chul Lee, Kyung-Ho Shin, Hyun-Woo Lee, and Sug-Bong Choe
Phys. Rev. Lett. 107, 217205 (2011)

(a) Two-dimensional map of E_B as a function of H and J. (b) E_B vs J at several bias H. The solid lines are the best fit with Eq. (2).

Electric control of magnetism at room T

Electrical control of the ferromagnetic phase transition in cobalt at room temperature.
D. Chiba, S. Fukami, K. Shimamura, N. Ishiwata, K. Kobayashi and T. Ono
Nature Mater. 10, 853 (2011)

Switching of ferromagnetism by electric field at room temperature and measurement configuration. a, Ferromagnetic phase transition of a metal ferromagnet of Cobalt (Co) was induced by applying a gate voltage (VG) at room temperature. The device for the transport measurements consists of a metal gate (Au=Cr), an insulator layer (HfO2), and an ultrathin Co layer. b, Measurement configuration with Hall-bar-shaped device. Anomalous Hall resistance (RHall) measured with a
d.c. current I of 20 A was used to measure the local magnetization of the ultrathin Co layer under the applications of the gate voltage (VG).

Radio-frequency current on spin-torque

Effects of radio-frequency current on critical fields for magnetization reversal in spin-torque devices.
W. Chen, S. H. Florez, J. A. Katine, M. J. Carey, L. Folks, and B. D. Terris
Phys. Rev. B 84, 054459 (2011)

(a), (b) Contour plots of dV/dI as a function of both the dc bias and the applied magnetic field, with the field-sweep directions from the AP to P state and from the P to AP state, respectively. (c) Schematic of the switching
boundaries, with the area of interest divided into several typical regimes.

Vortex superlattices

Spin-transfer torque and current-induced vortex superlattices in nanomagnets.
Oleksii M. Volkov, Volodymyr P. Kravchuk, Denis D. Sheka, and Yuri Gaididei
Phys. Rev. B 84, 052404 (2011)

Dependence of critical current J1 onthe nanodisk thickness for different disk diameters.

Classes of DW motion

Universality Classes of Magnetic DomainWall Motion.
Jae-Chul Lee,1,2 Kab-Jin Kim,1,* Jisu Ryu,3 Kyoung-Woong Moon,1 Sang-Jun Yun,1 Gi-Hong Gim, Kang-Soo Lee, Kyung-Ho Shin,2 Hyun-Woo Lee,3,† and Sug-Bong Choe
Phys. Rev. Lett. 107, 067201 (2011)

(a) The pure CIDWM V* vs J. Inset shows the motion of two DWs as a response to J. (b) V* vs ðH^1=4 for the DW motion driven by either pure H or J or both.