Structures and magnetic properties of wurtzite Zn1−xCoxO dilute magnetic semiconductor nanocomposites
Cobalt-doped ZnO dilute magnetic semiconductor nanocomposites Zn1−xCoxO with Co concentrations from 0.02 to 0.25 were prepared by the sol-gel method. The magnetic measurement shows paramagnetic ...
Cobalt-doped ZnO dilute magnetic semiconductor nanocomposites Zn1−xCoxO with Co concentrations from 0.02 to 0.25 were prepared by the sol-gel method. The magnetic measurement shows paramagnetic ...
Physical mechanisms of in situ surface gettering of metals in ribbon silicon for solar cells
The authors have employed synchrotron-based x-ray absorption near-edge spectroscopy and x-ray fluorescence microscopy to identify the chemical state and distribution of metals gettered to the surface ...
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Tuning alloy disorder in diluted magnetic semiconductors in high fields to 89 T
Appl. Phys. Lett. 90, 102109 (2007); doi:10.1063/1.2711370
Published 7 March 2007
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Alloy disorder in II-VI diluted magnetic semiconductors (DMS) is typically reduced when the local magnetic spins align in an applied magnetic field. An important and untested expectation of current models of alloy disorder, however, is that alloy fluctuations in many DMS compounds should increase again in very large magnetic fields of the order of 100 T. Here the authors measure the disorder potential in a Zn0.70Cd0.22Mn0.08Se quantum well via the low temperature photoluminescence linewidth using a pulsed magnet system to ~89 T. Above 70 T, the linewidth is observed to increase again, in accord with a simple model of alloy disorder.
©2007 American Institute of Physics
| History: | Received 14 December 2006; accepted 29 January 2007; published 7 March 2007 |
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