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  Absence of room temperature ferromagnetism in Mn-doped ZnS nanocrystalline thin film

El-Hagary, M., & Soltan, S. (2013). Absence of room temperature ferromagnetism in Mn-doped ZnS nanocrystalline thin film. Solid State Communications, 155, 29-33.

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El-Hagary, M., Author
Soltan, S.1, 2, Author           
Affiliations:
1Scientific Facility Thin Film Technology (Gennady Logvenov), Max Planck Institute for Solid State Research, Max Planck Society, ou_3370497              
2Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society, ou_3370480              

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 Abstract: Mn-doped ZnS nanocrystalline thin films having composition Zn1-xMnxS (x=0.02, 0.05, 0.1 and 0.15) were prepared by the electron beam evaporation technique. Their structural and magnetic properties had been investigated. X-ray diffraction results show single phase of hexagonal type structure samples without any detectable secondary phase providing the evidence that Mn2+ ions are incorporated into the ZnS lattice. Evidence of nanocrystalline nature of the films was observed from the investigation of surface morphology using atomic force microscopy. The magnetic measurements at 5 K reveal superparamagnetic behavior. The field dependent magnetization measurements confirm the absence of the room temperature ferromagnetism in the single phase electron beam evaporated Zn1-xMnxS (x=0.02, 0.05, 0.1 and 0.15) nanocrystalline films. Furthermore, the inverse susceptibility versus T confirms paramagnetic behavior for the Mn-doped films in the temperature range 100 K <= T <= 300 K. The absence of significant impurities and/or defects could be attributed to explanation for the absence of free carriers and consequently the absence of room temperature ferromagnetism in all nanocrystalline Zn1-xMnxS films. The absence of room temperature ferromagnetism is evidence by marked concave nature of Arrott's plot without any spontaneous magnetization. (C) 2012 Elsevier Ltd. All rights reserved.

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Language(s): eng - English
 Dates: 2013
 Publication Status: Issued
 Pages: -
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 Rev. Type: Internal
 Identifiers: eDoc: 672197
ISI: 000314562700007
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Title: Solid State Communications
Source Genre: Journal
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Pages: - Volume / Issue: 155 Sequence Number: - Start / End Page: 29 - 33 Identifier: ISSN: 0038-1098