Crystallographically oriented Zn nanocrystals formed in ZnO by Mn+-implantation

Li, Y. J.; Zhang, B.; Lu, Wenjian; Wang, Yong; Zou, Jin

doi:10.1063/1.2996028

Cited by 10 publications

(4 citation statements)

References 18 publications

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“…22 It was found that the substitutional Mn concentration of ZnMnO nanorods was increased after treated with N 2 O plasma. 23,24 For hydrogenated Zn 0.95 Mn 0.05 O nanopowders, it is expected that the hydrogen treatment breaks the bonds between the Mn ions that are not located at the Zn sites and disperses the excess Mn into the Zn sites. 23 The vibration mode at 529 cm −1 can be considered to associate with the increment of doping Mn.…”

Section: Resultsmentioning

confidence: 99%

Raman spectra and room-temperature ferromagnetism of hydrogenated Zn0.95Mn0.05O nanopowders

Wang

Geng

et al. 2009

Journal of Applied Physics

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Two additional vibration modes at 250 and 529 cm−1 were observed in hydrogenated Zn0.98Mn0.05O nanopowders. The number of oxygen vacancies was increased by hydrogenation, which induced the mode at 250 cm−1. The additional vibration mode at 529 cm−1 was due to the increase of the number of subsititutional Mn atoms occupying Zn sites, which resulted that some new lattice defects were introduced or intrinsic host-lattice defects became activated/intensified. The room-temperature ferromagnetism was observed in the hydrogenated Zn0.98Mn0.05O nanopowders prepared at high temperature (T=700 °C), which originated from the lattice defects such as oxygen vacancies and Zn interstitials.

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Section: Resultsmentioning

confidence: 99%

Raman spectra and room-temperature ferromagnetism of hydrogenated Zn0.95Mn0.05O nanopowders

Wang

Geng

et al. 2009

Journal of Applied Physics

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“…Macroscopically, the appearance of Fe, Co, Ni is clearly revealed by x-ray absorption as shown later in Sec. III C. In literature the application of EELS in similar cases (embedded nanocrystals) is mainly for qualitative investigation 22,23,24 . On the other hand, exposing the nanocrystals to the electron beam for a longer time results in a heavy beam damage and contamination of the specimens, as well as the structural modification of the nanocrystals 25 .…”

Section: B Magnetic Propertiesmentioning

confidence: 99%

Spinel ferrite nanocrystals embedded inside ZnO: Magnetic, electronic, and magnetotransport properties

Zhou

Potzger

et al. 2009

Phys. Rev. B

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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 magnetization. Anomalous Hall effect and positive magnetoresistance have been observed. Our study suggests a ferrimagnet/semiconductor hybrid system for potential applications in magneto-electronics. This hybrid system can be tuned by selecting different transition metal ions (from Mn to Zn) to obtain various magnetic and electronic properties.

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“…Apart from these normal modes of ZnO, there is an additional band with a peak at 526 cm -1 in the Raman spectra for all the Mn-doped ZnO films. Li et al [13] and Venkataraj et al…”

Section: Resultsmentioning

confidence: 99%

Optical and Electronic Properties of Mn-Doped ZnO Films Synthesized by RF Magnetron Sputtering

Cao

Wu³

et al. 2010

AMR

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. Zn1-xMnxO films are prepared by radio frequency (RF) magnetron sputtering method. The wurtzite ZnO crystal can be well retained up to a Mn composition of 6.7% and doped Mn ions substituted into Zn sites of ZnO host lattice. All the samples show high transparency over the wavelengths from 450 to 800 nm. Optical transmittance study showed an increase in the bandgap (Eg) with increase in Mn atomic fraction x following Eg=3.26+1.43x eV. Furthermore, the midgap absorption around 420 nm (3 eV) in Mn doped ZnO films suggest that there are impurity levels created by doped Mn ions. The room temperature resistivities of the samples show an increase with the increase of Mn content, which indicates that the doped element is at the status of deep levels.

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Crystallographically oriented Zn nanocrystals formed in ZnO by Mn+-implantation

Abstract: Articles you may be interested in Searching for room temperature ferromagnetism in transition metal implanted ZnO and GaN

Cited by 10 publications

References 18 publications

Raman spectra and room-temperature ferromagnetism of hydrogenated Zn0.95Mn0.05O nanopowders

Raman spectra and room-temperature ferromagnetism of hydrogenated Zn0.95Mn0.05O nanopowders

Spinel ferrite nanocrystals embedded inside ZnO: Magnetic, electronic, and magnetotransport properties

Optical and Electronic Properties of Mn-Doped ZnO Films Synthesized by RF Magnetron Sputtering

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