We describe structural, magnetic, and transport properties of the Cd${}_{1-}$${}_x$${}_{-y}$Mn${}_x$Cr${}_y$Te ferromagnetic semiconductor alloy. Bulk Cd${}_{1-x-y}$Mn${}_x$Cr${}_y$Te crystals containing up to 10$\%$ of Cr ($y$ $=$ 0.10) were grown by the Bridgman method and were found to be strongly $p$ type and ferromagnetic, with the highest Curie temperature of 362 K observed for $y$ $=$ 0.10. Magnetotransport measurements reveal the presence of the anomalous Hall effect up to and above room temperature, providing evidence that the observed ferromagnetism is characteristic of bulk Cd${}_{1-x-y}$Mn${}_x$Cr${}_y$Te. Our experiment data suggest that Cr ions play a crucial role in establishing ferromagnetism in this quaternary alloy.

• Received 16 April 2013

DOI:https://doi.org/10.1103/PhysRevB.88.075205