Magnetic, optical and transport properties of GaCrN-based ferromagnet/nonmagnet/ferromagnet trilayer structures

Abstract: GaCrN-based ferromagnet/nonmagnet/ferromagnet trilayer structures were grown by radio frequency molecular beam epitaxy. During GaN and GaCrN growth, reflection high-energy electron diffraction pattern showed thin streaks and Kikuchi lines, indicating surface flatness and high crystalline quality. Clear hysteresis and saturation characteristics were observed in the magnetization versus magnetic field curves at all the measuring temperatures. The coercivity H c was about 130Oe at 10K. Step-like hysteresis loops were also observed at 10 and 300K because of different Cr concentrations in the two GaCrN layers. Photoluminescence emission was observed from GaCrN. Hysteresis loop was observed in the magnetic field dependence of vertical electrical resistance. [Copyright &y& Elsevier]