Mn-CdGeP_24元系化合物の磁気的性質

概要

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A high concentration of Mn atoms was successfully introduced into the surface layer of the ternary compound semiconductor CdGeP_2. The crystal structure before and after introduction of the Mn atoms belongs to the same crystal system: tetragonal chalcopyrite structure. No traces of binary compounds were found in the XRD pattern. The magnetization curve measured by VSM clearly shows a hysteresis loop that is characteristic of a ferromagnetic material. The Curie temperature determined from the temperature dependence of magnetization was 320 K. This is the first report of room temperature ferromagnetism in any diluted magnetic semiconductor.
2001-04-15