Electron magnetic resonance characterization of Fe3+ impurities in a beta-Ga2O3 single crystal
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Beta-Ga2O3 single crystals co-doped with Fe3+ and Mn2+ impurity ions were grown using the floating zone method. By employing an X-band electron magnetic resonance (EMR) spectrometer, electron magnetic resonance spectra of Fe3+ impurity ions in the host crystals were recorded at room temperature. The rotation patterns of Fe3+ resonance lines in the crystallographic planes clearly show that the real local site symmetry of Fe3+ ion within the crystal is monoclinic. It turns out that the Fe3+ impurity ions substitute for Ga3+ ions (Ga3+I sites) in the oxygen octahedron in beta-Ga2O3 single crystal doped with Fe and Mn ions. The substitutional sites of Fe3+ ions are discussed and compared with Mn2+, Cr3+, and Gd3+ impurity ions in the host beta-Ga2O3 crystals.
Abstract
Beta-Ga2O3 single crystals co-doped with Fe3+ and Mn2+ impurity ions were grown using the floating zone method. By employing an X-band electron magnetic resonance (EMR) spectrometer, electron magnetic resonance spectra of Fe3+ impurity ions in the host crystals were recorded at room temperature. The rotation patterns of Fe3+ resonance lines in the crystallographic planes clearly show that the real local site symmetry of Fe3+ ion within the crystal is monoclinic. It turns out that the Fe3+ impurity ions substitute for Ga3+ ions (Ga3+I sites) in the oxygen octahedron in beta-Ga2O3 single crystal doped with Fe and Mn ions. The substitutional sites of Fe3+ ions are discussed and compared with Mn2+, Cr3+, and Gd3+ impurity ions in the host beta-Ga2O3 crystals.