Photo-carrier-induced magnetism in (In,Mn)As/GaSb magnetic alloy semiconductor heterostructures

We present wavelength dependence of photo-carrier-induced magnetization for (In,Mn)As/GaSb heterostructures, and discuss the problem involved in hole transfer from GaSb to (In,Mn)As across the (In,Mn)As/GaSb heterointerface. The reduction in coercive force by the light illumination has also been shown as a new effect associated with carrier-induced magnetism.