Optical enhancement of room temperature ferromagnetism in Er-doped GaN epilayers

N. Nepal, J. M. Zavada, R. Dahal, C. Ugolini, A. Sedhain, J. Y. Lin, H. X. Jiang

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Abstract

We report on the enhancement of magnetic properties of Er-doped GaN epilayer structures, grown by metal-organic chemical vapor deposition, with illumination from a light emitting diode. Single and multiple Er-doped epilayers were grown with Er concentrations up to ∼ 1021 cm-3. All samples exhibited hysteresis behavior at room temperature as measured by an alternating gradient magnetometer. When the samples were illuminated at a wavelength of 371 nm, an increase in saturation magnetization was observed for each sample. The percentage increase for multiple layer samples ranged from 10%-25% indicating possible device applications.

Original languageEnglish
Article number022510
JournalApplied Physics Letters
Volume95
Issue number2
DOIs
StatePublished - 2009

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