All-magnetic control of skyrmions in nanowires by a spin wave.

Magnetic skyrmions are topologically protected nanoscale objects, which are promising building blocks for novel magnetic and spintronic devices. Here, we investigate the dynamics of a skyrmion driven by a spin wave in a magnetic nanowire. It is found that (i) the skyrmion is first accelerated and then decelerated exponentially; (ii) it can turn L-corners with both right and left turns; and (iii) it always turns left (right) when the skyrmion number is positive (negative) in the T- and Y-junctions.

Picosecond electric field pulse induced coherent magnetic switching in MgO/FePt/Pt(001)-based tunnel junctions: a multiscale study.

Combined methods of first-principles calculations and Landau-Lifshitz-Gilbert (LLG) macrospin simulations are performed to investigate the coherent magnetization switching in the MgO/FePt/Pt(001)-based magnetic tunnel junctions triggered by short pulses of electric field through the control of magnetic anisotropy energy (MAE) electrically. First-principles calculations indicate that the MAE of MgO/FePt/Pt(001) film varies linearly with the change of the electric field, whereas the LLG simulations show that the change in MAE by electric field pulses could induce the in-plane magnetization reversal of the free layer by tuning the pulse parameters. We find that there exist a critical pulse width τmin to switch the in-plane magnetization, and this τmin deceases with the increasing pulse amplitude E0.

Randomized, double-blind, controlled trial of mifepristone in capsule versus tablet form followed by misoprostol for early medical abortion.

Objective: To compare the efficacy and side-effects of mifepristone 75 mg in capsule form versus 150 mg in tablet form followed by misoprostol for medical termination of early pregnancy.

Study Design: In a prospective randomized, double-blind, placebo-controlled trial, a total of 480 women who were 49 days or less pregnant were randomized by means of a random number table to receive either two tablets in the morning and one tablet 12 h later for 2 days (group A) or three capsules orally twice daily for 2 days, the first dose being double all subsequent doses (group B). After a further 48 h, 600 microg misoprostol was given orally.