Dresden 2014 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 32: Poster: ZnO and its relatives
HL 32.5: Poster
Montag, 31. März 2014, 17:00–20:00, P2
IR absorption study of cobalt doped ZnO — •Preeti Pandey1, 2, Edward V. Lavrov1, and Jörg Weber1 — 1Technische Universität, 01062 Dresden, Germany — 2Indian Institute of Technology Roorkee, Roorkee, India
Ferromagnetic Diluted Magnetic Semiconductors (DMSs) are expected to be a potential candidate for spin dependent electronics known as spintronics. Prediction of room temperature ferromagnetism in transition metal doped ZnO has initiated extensive research in this area [1]. Although much of research has been done regarding the electrical and magnetic properties of the material, it is equally important to analyze the optical properties. Vapor phase grown ZnO crystals doped with cobalt have been investigated by means of FTIR spectroscopy. Along with the temperature dependent spectra, polarized spectra of Co2+(d7) ions occupying substitutional Zn sites have been studied. Absorption lines due to 4A2(F) → 4T2(F) transitions positioned at 3609.4, 3614.9, 3628.5 and 3634.1 cm−1 are observed. Effect of hydrogen treatment on the cobalt-related complexes has also been probed. [1]. T. Dietl et al., Science, Vol. 287, 1019, 2000