Publication Type |
Journal Article |
School or College |
College of Engineering |
Department |
Materials Science & Engineering |
Creator |
Scarpulla, Michael |
Other Author |
Cardozo, B. L.; Farshchi, R.; Hlaing Oo, W. M.; McCluskey, M. D.; Yu, K. M.; Dubon, O. D. |
Title |
Ferromagnetism in Ga1-xMnxP: evidence for inter-Mn exchange mediated by localized holes within a detached impurity band |
Date |
2005-11 |
Description |
We report an energy gap for hole photoexcitation in ferromagnetic Ga1-xMnxP that is tunable by Mn concentration (x ≤ 0:06) and by compensation with Te donors. For x ~ 0:06, electrical transport is dominated by excitation across this gap above the Curie temperature (TC) of 60 K and by thermally activated hopping below TC. Magnetization measurements reveal a moment of 3:9 ± 0:4μB per substitutional Mn while the large anomalous Hall signal demonstrates that the ferromagnetism is carrier mediated. In aggregate these data indicate that ferromagnetic exchange is mediated by holes localized in a Mn-derived band that is detached from the valence band. |
Type |
Text |
Publisher |
American Physical Society |
Journal Title |
Physical Review Letters |
Volume |
95 |
Issue |
20 |
First Page |
207204-1 |
Last Page |
207204-4 |
DOI |
10.1103/PhysRevLett.95.207204 |
citatation_issn |
0031-9007 |
Subject |
Gallium Phosphide; Ferromagnetism; Mn impurity band |
Subject LCSH |
Diluted magnetic semiconductors; Semiconductors -- Magnetic properties; Semiconductor doping; Holes (Electron deficiencies); Ion implantation; Spintronics |
Language |
eng |
Bibliographic Citation |
Scarpulla, M., Cardozo, B. L., Farshchi, R., Hlaing O.o W. M., McCluskey, M. D., Yu, K. M., & Dubon, O. D. (2005). Ferromagnetism in Ga1-xMnxP: evidence for inter-Mn exchange mediated by localized holes within a detached impurity band. Physical Review Letters, 95(20), 207204-1-207204-4. |
Rights Management |
(c) American Physical Society http://dx.doi.org/10.1103/PhysRevLett.95.207204 |
Format Medium |
application/pdf |
Format Extent |
403,882 bytes |
Identifier |
ir-main,12263 |
ARK |
ark:/87278/s6ht36tt |
Setname |
ir_uspace |
ID |
705535 |
Reference URL |
https://collections.lib.utah.edu/ark:/87278/s6ht36tt |