| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1591553 | Solid State Communications | 2015 | 4 Pages |
•We roport on magneto-optical properties of (Zn,Co)Se diluted magnetic semiconductor.•Excitonic photoluminescence reveals efficient energy transfer from band carriers to Co2+ ions.•Magneto-photoluminescence of Co2+ intraionic transition in ZnSe is presented, characteristic parameters are determined.•Giant Zeeman effect is used to determine cobalt concentration.
We report on optical properties of epitaxially grown Zn1−xZn1−xCoxSe diluted magnetic semiconductor. Excitonic photoluminescence reveals efficient energy transfer from band carriers to Co2+ ions. Magneto-photoluminescence of 2T1–4A2 intraionic transition of Co2+ in ZnSe is evidenced and discussed based on reported magneto-absorption results. Determined values of g factors are gA=0.62± 0.09 and gB =3.71± 0.05 for optical transitions, and ge=−0.8±0.2ge=−0.8±0.2 for the 2T1 excited state of Co2+. Cobalt ion concentration in the sample is determined using both reflection measurements of excitonic giant Zeeman effect and direct magnetometry.
