5 papers · 1 filter
Local Environment of Ferromagnetically Ordered Mn in Epitaxial InMnAs
P. T. Chiu, B. W. Wessels, D. J. Keavney +1
The magnetic properties of the ferromagnetic semiconductor In0.98Mn0.02As were characterized by x-ray absorption spectroscopy and x-ray magnetic circular dichroism. The Mn exhibits…
Negative Magnetoresistance in (In,Mn)As
S. J. May, A. J. Blattner, B. W. Wessels
The magnetotransport properties of an In0.95Mn0.05As thin film grown by metal-organic vapor phase epitaxy were measured. Resistivity was measured over the temperature range of 5 to…
Electronic states of Mn4+ ions in p-type GaN
B. Han, B. W. Wessels, M. P. Ulmer
The electronic states of manganese in p-type GaN are investigated using photoluminescence (PL) and photoluminescence excitation (PLE) spectroscopies. A series of sharp PL lines at…
Optical properties of Mn4+ ions in GaN:Mn codoped with Mg acceptors
B. Han, R. Y. Korotkov, B. W. Wessels +1
The optical properties of Mn-Mg codoped epitaxial GaN were studied. Addition of Mg acceptors quenches the weak manganese-related photoluminescence (PL) band at 1.3 eV in GaN:Mn and…
Ferromagnetism in (In,Mn)As alloy thin films grown by metalorganic vapor phase epitaxy
A. J. Blattner, B. W. Wessels
Ferromagnetic properties of In1-xMnxAs thin films were investigated. Room temperature ferromagnetic order was observed in nominally single-phase films with x = 0.01-0.10. Magnetiza…