Abstract
Ferromagnetism is observed below in . This material has the BiTe structure, which is made from the stacking of two Te-Bi-Te-Bi-Te blocks and one Bi-Bi block per unit cell. Crystal structure analysis shows that Mn is localized in the blocks, and is accompanied by an equal amount of antisite occupancy in the blocks. These antisite defects greatly enhance the Mn solubility. This is demonstrated by comparison of the and series; in the former, the solubility is limited to , while the latter has . The magnetism in changes little with , while that for shows a clear variation, leading to ferromagnetism for . Magnetic hysteresis and the anomalous Hall effect are observed for the ferromagnetic samples.
- Received 11 April 2006
DOI:https://doi.org/10.1103/PhysRevB.74.184429
©2006 American Physical Society