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

O. Perales-Perez; A. Parra-Palomino; R. Singhal; P. M. Voyles; Ye Zhu; W. Jia; M. S. Tomar

doi:10.1088/0957-4484/18/31/315606

Evidence of ferromagnetism in Zn_1-xM_xO (M ≤ Ni,Cu) nanocrystals for spintronics

O. Perales-Perez, A. Parra-Palomino, R. Singhal, P. M. Voyles, Ye Zhu, W. Jia, M. S. Tomar

Research output: Journal article publication › Journal article › Academic research › peer-review

22 Citations (Scopus)

Abstract

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.

Original language	English
Article number	315606
Journal	Nanotechnology
Volume	18
Issue number	31
DOIs	https://doi.org/10.1088/0957-4484/18/31/315606
Publication status	Published - 8 Aug 2007
Externally published	Yes

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Mechanics of Materials
Mechanical Engineering
Electrical and Electronic Engineering

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10.1088/0957-4484/18/31/315606

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abstract = "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.",

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AU - Perales-Perez, O.

AU - Parra-Palomino, A.

AU - Singhal, R.

AU - Voyles, P. M.

AU - Zhu, Ye

AU - Jia, W.

AU - Tomar, M. S.

PY - 2007/8/8

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N2 - 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.

AB - 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.

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Evidence of ferromagnetism in Zn_1-xM_xO (M ≤ Ni,Cu) nanocrystals for spintronics

Abstract

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