Abstract
The effects of low-temperature (210°C-290°C) annealing on the microstructure, lattice constant, and magnetic properties of (In 0.52 Al 0.48 ) 0.91 Mn 0.09 As grown by low-temperature molecular-beam epitaxy were studied. The results show that low-temperature annealing has little influence on the crystalline structure and interface quality of (In 0.52 Al 0.48 ) 0.91 Mn 0.09 As epilayer. In contrast, both the lattice constant and Curie temperature of (In 0.52 Al 0.48 ) 0.91 Mn 0.09 As are found to be strongly dependent on the annealing temperature. The lattice constant linearly decreases with increasing annealing temperature; while the Curie temperature increases with increasing annealing temperature up to 250°C, and then abruptly decreases upon further annealed at 270°C and 290°C. © 2005 IEEE.