Zobrazeno 1 - 10
of 518
pro vyhledávání: '"Potzger K"'
Autor:
Hammerath, F., Bali, R., Huebner, R., Brandt, M. R. D., Rodan, S., Potzger, K., Boettger, R., Sakuraba, Y., Buechner, B., Wurmehl, S.
We investigated the structure-property relationship of Co$_2$MnSi Heusler thin films upon the irradiation with He$^+$ ions. The variation of the crystal structure with increasing ion fluence has been probed using nuclear magnetic resonance (NMR) and
Externí odkaz:
http://arxiv.org/abs/1809.07097
Autor:
Strusch, T., Lenz, K., Meckenstock, R., Bali, R., Ehrler, J., Lindner, J., Fassbender, J., Farle, M., Potzger, K., Semisalova, A.
Publikováno v:
Journal of Applied Physics; 12/7/2022, Vol. 132 Issue 21, p1-8, 8p
Autor:
Zhou, Shengqiang, Potzger, K., Talut, G., von Borany, J., Skorupa, W., Helm, M., Fassbender, J.
Publikováno v:
J. Appl. Phys. 103, 07D530 (2008)
In the past decade, room temperature ferromagnetism was often observed in transition metal doped semiconductors, which were claimed as diluted magnetic semiconductors (DMS). Nowadays intensive activities are devoted to clarify wether the observed fer
Externí odkaz:
http://arxiv.org/abs/1301.0100
Publikováno v:
Appl. Phys. Lett. 98, 222508 (2011)
6H-SiC (silicon carbide) single crystals containing VSi-VC divacancies are investigated with respect to magnetic and structural properties. We found that an initial increase of structural disorder leads to pronounced ferromagnetic properties at room
Externí odkaz:
http://arxiv.org/abs/1106.0966
Autor:
Zhou, Shengqiang, Potzger, K., Xu, Qingyu, Kuepper, K., Talut, G., Marko, D., Muecklich, A., Helm, M., Fassbender, J., Arenholz, E., Schmidt, H.
Publikováno v:
Phys. Rev. B 80, 094409 (2009)
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 different magnetic properties, e.g. coercivity and mag
Externí odkaz:
http://arxiv.org/abs/0908.3488
Publikováno v:
Phys. Rev. B 80, 174423 (2009)
The doping of Mn in Si is attracting research attentions due to the possibility to fabricate Si-based diluted magnetic semiconductors. However, the low solubility of Mn in Si favors the precipitation of Mn ions even at non-equilibrium growth conditio
Externí odkaz:
http://arxiv.org/abs/0908.2906
Autor:
Zhou, Shengqiang, Potzger, K., von Borany, J., Groetzschel, R., Skorupa, W., Helm, M., Fassbender, J.
Publikováno v:
Phys. Rev. B 77, 035209 (2008)
In the last decade, transition-metal-doped ZnO has been intensively investigated as a route to room-temperature diluted magnetic semiconductors (DMSs). However, the origin for the reported ferromagnetism in ZnO-based DMS remains questionable. Possibl
Externí odkaz:
http://arxiv.org/abs/0908.0458
Autor:
Zhou, Shengqiang, Potzger, K., Talut, G., Reuther, H., Kuepper, K., Grenzer, J., Xu, Qingyu, Helm, A. Muecklich M., Fassbender, J., Arenholz, E.
Publikováno v:
J. Phys. D: Appl. Phys. 41 105011 (2008)
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 formation is suppressed, no evidence for the relevance
Externí odkaz:
http://arxiv.org/abs/0908.0402
Autor:
Zhou, Shengqiang, Potzger, K., Talut, G., Reuther, H., von Borany, J., Groetzschel, R., Skorupa, W., Helm, M., Fassbender, J., Volbers, N., Lorenz, M., Herrmannsdoerfer, T.
Publikováno v:
J. Appl. Phys. 103, 023902 (2008)
Nowadays ferromagnetism is often found in potential diluted magnetic semiconductor systems. However, many authors argue that the observed ferromagnetism stems from ferromagnetic precipitates or spinodal decomposition rather than from carrier mediated
Externí odkaz:
http://arxiv.org/abs/0908.0405
Autor:
Potzger, K., Zhou, Shengqiang, Reuther, H., Kuepper, K., Talut, G., Helm, M., Fassbender, J., Denlinger, J. D.
Publikováno v:
Appl. Phys. Lett. 91, 062107 (2007)
Unwanted secondary phases are one of the major problems in diluted magnetic semiconductor creation. Here, the authors show possibilities to avoid such phases in Fe implanted and postannealed ZnO(0001) single crystals. While -Fe nanoparticles are form
Externí odkaz:
http://arxiv.org/abs/0908.0396