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Bulk Zn1 − xCoxO magnetic semiconductors prepared by hydrothermal technique by M. Bouloudenine; N. Viart; S. Colis; A. Dinia is a Physics and Astronomy article available to read on EtoBox.

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We have used a hydrothermal technique to synthesize polycrystalline Zn 1 À x Co x O diluted magnetic semiconductor. The synthesis temperature was of 240 °C and the Co concentration of 10 at.%. X-ray diffraction indicates that the Co-doped ZnO thus prepared has the pure ZnO wurtzite structure without any significant change in the cell parameters. Optical absorption measurements show several absorption bands that are due to the transitions between the crystal-field-split 3d levels of tetrahedral Co 2+ substituting Zn 2+ ions. Room temperature magnetization measurements reveal a paramagnetic behavior for the Co-doped ZnO samples. This is attributed to the absence of free carriers.

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Author

M. Bouloudenine; N. Viart; S. Colis; A. Dinia

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0009-2614)

Published

2004

Language

EN

Field

Physics and Astronomy (Physical Sciences)