Realization of artificial skyrmion in CoCrPt/NiFe bilayers
Project supported by the National Key Research and Development Program of China (Grant No. 2018YFF01010701), the National Natural Science Foundation of China (Grant No. 51332003), and the Sichuan Science and Technology Program, China (Grant No. 2018G20140).
(color online) Plots of core diameter of skyrmion versus external magnetic field Bz ranging (a) from −90 mT to 90 mT, and (b) from 10 mT to 60 mT, for different interlayer exchange constants; (c) plots of core diameter of skyrmion versus external magnetic field Bz ranging from −180 mT to 130 mT for different soft magnetic layer diameters; (d) plots of core diameter of skyrmion versus thickness of bottom CoCrPt layer (CoCrPt(x nm)/Cu(40 nm)/CoCrPt(10 nm)/NiFe(8 nm)) ranging from 0 nm to 80 nm in +Z and −Z directions; (e) plots of core diameter of skyrmion versus thickness of Cu layer(CoCrPt(40 nm)/Cu(x nm)/CoCrPt(10 nm)/NiFe(8 nm)) ranging from 0 nm to 80 nm in +Z and −Z directions. Panel (b) shows an enlargement of the shadowed area in panel (a); In panels (d) and (e) the blue and red line represent the directions of the magnetic moment of the bottom CoCrPt in +Z and −Z directions, respectively, and all the direction of the skyrmion core is in the −Z direction.
