The magnetic properties of Be-codoped GaMnN grown via molecular beam epitaxy
摘要:
GaMnN and Be-codoped GaMnN were grown via molecular beam epitaxy using a single GaN precursor and their structural and magnetic properties were examined. X-ray diffraction and superconducting quantum interference device (SQUID) measurements revealed that the grown layers are homogeneous without precipitates. The saturation magnetization of GaMnN has increased from similar to 4 to similar to 16 emu/cm(3) via codoping of Be. The d-d exchange interaction between Mn atoms was discussed for the ferromagnetism of GaMnN. (C) 2006 Elsevier B. V. All rights reserved.