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Effect of manganese doping on vibrational and physical properties of ZrTe3O8.

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Title: Effect of manganese doping on vibrational and physical properties of ZrTe3O8.
Authors: Koubaa, M.1, Karray, R.1, Dhifallah, N.2, Kabadou, A.1 ahlemkabadou@yahoo.fr, Bsais, L.3
Source: Journal of Alloys & Compounds. Jun2017, Vol. 709, p808-818. 11p.
Subjects: Vibration (Mechanics), Zirconium compounds, Solid state chemistry, Doping agents (Chemistry), Crystal structure
Abstract: The powder sample of xMnO 2 –(1−x) ZrTe 3 O 8 (x = 7%) was prepared by the conventional solid state reaction method. X-ray diffraction showed that the compound crystallized at room temperature in the cubic fluorite structure (in a cubic unit-cell Ia 3 ¯ as MTe 3 O 8 -type framework) with lattice parameter a = 11.3298(2) Ǻ. The structure was built up of TeO 4 E (E = Electronic lone pair of Te(IV)) disphnoids and regular ZrO 6 octahedra. The crystal structure cohesion was ensured via Te O(2) Zr and Te O(1) Te bridges. The Raman spectrum was dominated by a stronger band at 858 cm −1 , characteristic of Te O(2) Zr bridges asymmetric stretching vibration. Thus, the Te O(2) and Zr(Mn) O(2) bonds are chemically inequivalent and then the Te O(2) Zr bridges are chemically asymmetric. Magnetization measurements versus temperature in an applied magnetic field of 0.05 T were determined. The doping of Zr by Mn induces a ferro-paramagnetic transition at T = 18.5 K. The complex impedance of the xMnO 2 -(1−x) ZrTe 3 O 8 (x = 7%) ceramics has been investigated in the temperature range 293–843 K and in the frequency range 100 Hz–1 MHz. Dielectric data were analyzed using complex permittivity (ε′), (ε″) and tan (δ) for the sample at various temperatures. The conductivity follows the Arrhenius relation. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Alloys & Compounds is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 122527993
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Effect of manganese doping on vibrational and physical properties of ZrTe3O8.
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  Data: <searchLink fieldCode="AR" term="%22Koubaa%2C+M%2E%22">Koubaa, M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Karray%2C+R%2E%22">Karray, R.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Dhifallah%2C+N%2E%22">Dhifallah, N.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Kabadou%2C+A%2E%22">Kabadou, A.</searchLink><relatesTo>1</relatesTo><i> ahlemkabadou@yahoo.fr</i><br /><searchLink fieldCode="AR" term="%22Bsais%2C+L%2E%22">Bsais, L.</searchLink><relatesTo>3</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Alloys+%26+Compounds%22">Journal of Alloys & Compounds</searchLink>. Jun2017, Vol. 709, p808-818. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Vibration+%28Mechanics%29%22">Vibration (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Zirconium+compounds%22">Zirconium compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Solid+state+chemistry%22">Solid state chemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Doping+agents+%28Chemistry%29%22">Doping agents (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Crystal+structure%22">Crystal structure</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The powder sample of xMnO 2 –(1−x) ZrTe 3 O 8 (x = 7%) was prepared by the conventional solid state reaction method. X-ray diffraction showed that the compound crystallized at room temperature in the cubic fluorite structure (in a cubic unit-cell Ia 3 ¯ as MTe 3 O 8 -type framework) with lattice parameter a = 11.3298(2) Ǻ. The structure was built up of TeO 4 E (E = Electronic lone pair of Te(IV)) disphnoids and regular ZrO 6 octahedra. The crystal structure cohesion was ensured via Te O(2) Zr and Te O(1) Te bridges. The Raman spectrum was dominated by a stronger band at 858 cm −1 , characteristic of Te O(2) Zr bridges asymmetric stretching vibration. Thus, the Te O(2) and Zr(Mn) O(2) bonds are chemically inequivalent and then the Te O(2) Zr bridges are chemically asymmetric. Magnetization measurements versus temperature in an applied magnetic field of 0.05 T were determined. The doping of Zr by Mn induces a ferro-paramagnetic transition at T = 18.5 K. The complex impedance of the xMnO 2 -(1−x) ZrTe 3 O 8 (x = 7%) ceramics has been investigated in the temperature range 293–843 K and in the frequency range 100 Hz–1 MHz. Dielectric data were analyzed using complex permittivity (ε′), (ε″) and tan (δ) for the sample at various temperatures. The conductivity follows the Arrhenius relation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Alloys & Compounds is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.jallcom.2017.03.053
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        Text: English
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        PageCount: 11
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        Type: general
      – SubjectFull: Zirconium compounds
        Type: general
      – SubjectFull: Solid state chemistry
        Type: general
      – SubjectFull: Doping agents (Chemistry)
        Type: general
      – SubjectFull: Crystal structure
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      – TitleFull: Effect of manganese doping on vibrational and physical properties of ZrTe3O8.
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              M: 06
              Text: Jun2017
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