High Temperature Ferromagnetism in Zn1-xMnxO semiconductor thin films

Details High Temperature Ferromagnetism in Zn1-xMnxO semiconductor thin films High Temperature Ferromagnetism in Zn1-xMnxO semiconductor thin films

2004-08-12

arxiv.org/abs/cond-mat/0408294v1

Physics

Condensed Matter

Materials Science

15 pages, 4 figures

Scientific paper

Clear evidence of ferromagnetic behavior at temperatures >400 K as well as spin polarization of the charge carriers have been observed in ZnMnO thin films grown on Al2O3 and MgO substrates. The magnetic properties depended on the exact Mn concentration and the growth parameters. In well-characterized single-phase films, the magnetic moment is 4.8?B/Mn at 350 K, the highest moment yet reported for any Mn doped magnetic semiconductor. Anomalous Hall effect shows that the charge carriers (electrons) are spin polarized and participate in the observed ferromagnetic behavior.

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