Structural and magnetic properties of ZnO:TM (TM: Co,Mn) nanopowders
D. Rubi, A. Calleja, J. Arbiol, X.G. Capdevila, M. Segarra, Ll., Aragones, J. Fontcuberta
TL;DR
This paper investigates the structural and magnetic properties of Co and Mn doped ZnO nanopowders, revealing intrinsic ferromagnetism influenced by defects, with implications for diluted magnetic semiconductors.
Contribution
It demonstrates that low-temperature fired ZnO:TM nanopowders exhibit impurity-independent ferromagnetism driven by defects, advancing understanding of magnetic behavior in diluted semiconductors.
Findings
Ferromagnetic interaction observed in low-temperature fired samples.
Magnetic aging mechanism linked to defect stabilization.
Ferromagnetism not due to impurities.
Abstract
We report on the structural and magnetic characterization of Co0.1Zn0.9O and Mn0.1Zn0.9O nanopowders obtained by a soft chemistry route. We show that those samples fired at low temperatures display a ferromagnetic interaction that can not be attributed to the presence of impurities. A magnetic aging mechanism is observed, reflecting the key role played by defects in the stabilization of ferromagnetism in this kind of diluted magnetic semiconductors.
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