Zn1−xCoxSe: A new diluted magnetic semiconductor grown by molecular beam epitaxy

Abstract
We have grown single‐crystal epilayers of the new diluted magnetic semiconductor Zn1−xCox Se on GaAs(001) substrates by molecular beam epitaxy. X‐ray θ‐2θ and double‐crystal rocking curve measurements were used to obtain the variation in lattice parameter and evaluate crystalline quality. Temperature‐dependent electron paramagnetic resonance and superconducting quantum interference device magnetometry data confirm the substitutional nature of the Co2+ in the zinc site and paramagnetic behavior.