The (Ga,Mn)N nanowires with different Mn concentrations of 0.5%-10% were synthesized by varying the separation between Mn Cl2 and GaN powders under N H3 gas flow via the chemical vapor deposition method. The structural analyses demonstrate that all the nanowires are a single crystal without secondary phases. The room-temperature ferromagnetism was found to depend on Mn concentration in the (Ga,Mn)N nanowires which were converted from n type to p type with increasing Mn concentration. In particular, the highest magnetic moment was shown in the p -type (Ga,Mn)N nanowires with Mn concentration of 5% and hole concentration of 1017 cm-3.
Bibliographical noteFunding Information:
This work was supported by National R&D Project for Nano Science and Technology. The authors are grateful to D. K. Oh at the Korea Basic Science Institute for his assistance with the SQUID magnetometer.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)