From conservation laws to selection rules, symmetry arguments have long been revered for their far-reaching consequences in physics. Now they point to an effective spin-orbit coupling in antiferromagnetic conductors.
Most applications based on magnetism are incompatible with domain walls, which interrupt a homogeneous magnetization. Scientists are turning this view around as they discover new ways to use an electric current to manipulate and store information in nanoscale domain walls.
Phys. Rev. Focus7, 3 (2001) – Published January 19, 2001
A region of magnetic material flips direction quicker when an extra magnetic field is present, according to new high speed movies. The experiments show how the read and write operations in disk drives work at a microscopic level.