Abstract
Neutron-diffraction spectra of molecular-beam-epitaxy-grown single-crystal zinc-blende films of Se reveals the onset of type-III antiferromagnetic ordering (AFM-III) for x=0.70 and 0.75 at a sharp Néel temperature. The AFM-III order is long range, with correlation lengths of around 400 Å, and the transition is of second order. This contrasts sharply with earlier studies of bulk diluted magnetic semiconductors, where only short-range AFM-III correlations are observed, evolving gradually with decreasing temperature, and saturating at correlation length values less than 70 Å.
- Received 16 March 1990
DOI:https://doi.org/10.1103/PhysRevB.42.2582
©1990 American Physical Society