CONTROLLED INJECTION OF A SINGULAR POINT ALONG A LINEAR MAGNETIC-STRUCTURE

The injection of a Bloch point, along a Neel line residing in a Bloch wall separating two magnetic domains, was monitored by direct line obs ervation and careful control of the lines state. Injection was achieve d by pushing selected lines into a region where the surface had been i on-implanted, resulting in a modification of the spins orientation alo ng the line at surface level. The optical observation of lines relies on an anisotropic dark field imaging technique developed earlier. Dire ct confirmation of the micromagnetic picture of a Bloch point-containi ng line is obtained.