Nano Archive

Evidence of ferromagnetism in Zn1-xMxO (M = Ni, Cu) nanocrystals for spintronics

Perales-Perez, O. and Parra-Palomino, A. and Singhal, R. and Voyles, P. M. and Zhu, Y. and Jia, W. and Tomar, M. S. (2007) Evidence of ferromagnetism in Zn1-xMxO (M = Ni, Cu) nanocrystals for spintronics. NANOTECHNOLOGY, 18 (31).

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We present the conditions for room-temperature synthesis of bare, Ni-and Cu-doped ZnO nanocrystals in ethanol and their characterization. The formation of a ZnO host structure was delayed when dopant ions co-existed in the starting solutions. After ageing in mother liquors, well-crystallized doped nanocrystals were produced. Monodispersity of the nanocrystals (5-8 nm) was shown by high resolution transmission electron microscopy (HRTEM). Ultraviolet-visible (UV-vis) and photoluminescence (PL) measurements also confirmed the nanocrystalline nature and the continuous growth of the crystals when aged at room temperature. Room-temperature SQUID measurements showed weak but noticeable ferromagnetism, which was dependent on synthesis conditions.

Item Type:Article
Subjects:Material Science > Functional and hybrid materials
Physical Science > Nanomagnetics
ID Code:6349
Deposited By:IoN
Deposited On:28 Sep 2009 12:05
Last Modified:28 Sep 2009 12:05

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