4.6 Article

Magnetic circular dichroism of ferromagnetic Co2+-doped ZnO

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APPLIED PHYSICS LETTERS
卷 89, 期 6, 页码 -

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AMER INST PHYSICS
DOI: 10.1063/1.2221871

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Cobalt-doped ZnO (Co2+:ZnO) films were studied by magnetic circular dichroism (MCD) spectroscopy. A broad 300 K ferromagnetic MCD signal was observed between 1.4 and 4.0 eV after exposure of paramagnetic Co2+:ZnO films to zinc metal vapor, attributed to low-energy photoionization transitions originating from a spin-split donor impurity band in ferromagnetic n-type Co2+:ZnO. (c) 2006 American Institute of Physics.

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