Zhou, Shengqiang, Potzger, K., Xu, Qingyu, Kuepper, K., Talut, G., Marko, D., ...
In this paper we show that spinel ferrite nanocrystals (NiFe2O4, and CoFe2O4) can be texturally embedded inside a ZnO matrix by ion implantation and post-annealing. The two kinds of ferrites show...
Zhou, Shengqiang, Potzger, K., Talut, G., Reuther, H., Kuepper, K., Grenzer, J., ...
We investigated ZnO(0001) single crystals annealed in high vacuum with respect to their magnetic properties and cluster formation tendency after implant-doping with Fe. While metallic Fe cluster...
Ferromagnetic transition metal implanted ZnO: a diluted magnetic semiconductor? (2009)
Zhou, Shengqiang, Potzger, K., Xu, Qingyu, Talut, G., Lorenz, M., Skorupa, W., ...
Recently theoretical works predict that some semiconductors (e.g. ZnO) doped with magnetic ions are diluted magnetic semiconductors (DMS). In DMS magnetic ions substitute cation sites of the host...
Ferromagnetic, structurally disordered ZnO implanted with Co ions (2008)
Potzger, Kay, Zhou, Shengqiang, Xu, Qingyu, Shalimov, Artem, Groetzschel, Rainer, Schmidt, Heidemarie, ...
We present superparamagnetic clusters of structurally highly disordered Co-Zn-O created by high fluence Co ion implantation into ZnO (0001) single crystals at low temperatures. This secondary phase...
Room temperature ferromagnetism in carbon-implanted ZnO (2008)
Zhou, Shengqiang, Xu, Qingyu, Potzger, Kay, Talut, Georg, Groetzschel, Rainer, Fassbender, Juergen, ...
Unexpected ferromagnetism has been observed in carbon doped ZnO films grown by pulsed laser deposition [Phys. Rev. Lett. 99, 127201 (2007)]. In this letter, we introduce carbon into ZnO films by ion...
Wang, Zhiming, Xu, Feng, Lu, Chao, Zhang, He, Xu, Qingyu, Zhu, Jinan
The transport properties of highly oriented pyrolitic graphite (HOPG) and polycrystal graphite have been studied. The electric conductivity of HOPG is several times larger than that of the...