High-quality (Ga,Fe)Sb ferromagnetic semiconductor step-flow growth method with record-high 530°K Curie temperature for spintronics

https://www.eurekalert.org/news-releases/1084679

"combines semiconductor/ magnet properties... (Ga,Mn)As exhibit low Curie temperature, limiting use in spintronics even while adding Fe to narrow bandgap, but doing so while maintaining crystallinity proved difficult, restricting attainable Curie temperature... overcome using vicinal GaAs (100) substrates with high 10° off-angle... large magnetic moment per Fe atom (4.5 μB/atom), which is close to the ideal value for Fe³⁺ ions in a zinc blended crystal structure (5 μB/atom)... spin-functional room temperature semiconductors"