Tuning magnetic disorder in diluted magnetic semiconductors using high fields to 89 Tesla
Journal Article
·
· International Journal of Modern Physics B
OSTI ID:960778
- Los Alamos National Laboratory
- PENN STATE U
We describe recent and ongoing studies at the National High Magnetic Field Laboratory at Los Alamos using the new '100 Tesla Multi-Shot Magnet', which is presently delivering fields up to {approx}89 T during its commissioning. We discuss the first experiments performed in this magnet system, wherein the linewidth of low-temperature photoluminescence spectra was used to directly reveal the degree of magnetic alloy disorder 'seen' by excitons in single Zn{sub 0.80}Cd{sub 0.22}Mn{sub 0.08}Se quantum wells. The magnetic potential landscape in II-VI diluted magnetic semiconductors (DMS) is typically smoothed when the embedded Mn{sup 2+} spins align in an applied field. However, an important (but heretofore untested) prediction of current models of compositional disorder is that magnetic alloy fluctuations in many DMS compounds should increase again in very large magnetic fields approaching 100 T. We observed precisely this increase above {approx}70 T, in agreement with a simple model of magnetic alloy disorder.
- Research Organization:
- Los Alamos National Laboratory (LANL)
- Sponsoring Organization:
- DOE
- DOE Contract Number:
- AC52-06NA25396
- OSTI ID:
- 960778
- Report Number(s):
- LA-UR-08-07144; LA-UR-08-7144
- Journal Information:
- International Journal of Modern Physics B, Journal Name: International Journal of Modern Physics B; ISSN IJPBEV; ISSN 0217-9792
- Country of Publication:
- United States
- Language:
- English
Similar Records
Magnetic Semiconductor Quantum Wells in High Fields to 60 Tesla: Photoluminescence Linewidth Annealing at Magnetization Steps
Magnetic semiconductor quantum wells in high fields to 60 Tesla: Photoluminescence linewidth annealing at magnetization steps
Exciton magnetoluminescence studies in ordered and disordered In{sub 0.48}Ga{sub 0.52}P semiconductor alloys
Journal Article
·
Mon May 24 00:00:00 EDT 1999
· Physical Review B (Rapid Communications)
·
OSTI ID:7058
Magnetic semiconductor quantum wells in high fields to 60 Tesla: Photoluminescence linewidth annealing at magnetization steps
Journal Article
·
Thu Jul 01 00:00:00 EDT 1999
· Physical Review, B: Condensed Matter
·
OSTI ID:357612
Exciton magnetoluminescence studies in ordered and disordered In{sub 0.48}Ga{sub 0.52}P semiconductor alloys
Conference
·
Wed Dec 30 23:00:00 EST 1992
·
OSTI ID:10121387