Abstract
We studied the electronic structure and magnetization of Mn dopants in GaN nanowires at the ensemble and single nanowire levels by near edge x-ray absorption fine structure spectroscopies. The results of single nanowire measurements indicate that Mn adopts tetrahedral coordination in GaN nanowires and has mixed oxidation state (Mn2/Mn3), with Mn 2 being in relative majority. Ensemble nanowire spectra suggest co-deposition of Mn secondary phases alongside nanowires. Single nanowire x-ray magnetic circular dichroism indicates intrinsic magnetic ordering of Mn dopants at 300 K. In contrast, as-grown nanowire samples show only residual magnetization, due to nanowire orientation dependence of magnetization.
Original language | English (US) |
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Article number | 222504 |
Journal | Applied Physics Letters |
Volume | 99 |
Issue number | 22 |
DOIs | |
State | Published - Nov 28 2011 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)