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Effect of the simultaneous substitution of two transition metals on the structural, magnetic and electrical properties of La0.6Sr0.4Mn1−2x Cr x Fe x O3

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Title: Effect of the simultaneous substitution of two transition metals on the structural, magnetic and electrical properties of La0.6Sr0.4Mn1−2x Cr x Fe x O3
Authors: Ben Abdelkhalek, Sonia1, Kallel, Nabil1 Nabil.Kallel@fsm.rnu.tn, Kallel, Sami1, Guizouarn, Thierry2, Peña, Octavio2, Oumezzine, Mohamed1
Source: Journal of Magnetism & Magnetic Materials. Nov2010, Vol. 322 Issue 21, p3416-3422. 7p.
Subjects: Transition metals, Electric properties of metals, Magnetic properties of metals, Perovskite, Curie temperature, Magnetization, Zero-point field, Spin glasses, Antiferromagnetism
Abstract: Abstract: The structural, magnetic and electrical properties of Cr and Fe simultaneously substituted in the perovskite La0.6Sr0.4Mn1−2x Cr x Fe x O3 have been studied. The presence of Cr and Fe had no significant effect on the structural properties. Curie temperature and saturation magnetization decrease with increase in Cr and Fe contents. For x=0.20 and 0.25, a steep drop of zero field-cooled (ZFC) magnetization at low temperature signifies the formation of cluster- or spin-glass state. A weak hysteresis at low fields seems to be an indication of phase separation. All the resulting magnetization curves can be explained by a superposition of both ferromagnetic and antiferromagnetic components. All the samples are semiconducting throughout the temperature range studied. Resistivity can be described by the adiabatic small polaron hopping and the variable range hopping model. It was found that the transport mechanism is dominated by the VRH model with an increase of Mott localization energy, which explains the increase of resistivity. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Magnetism & Magnetic Materials 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.)
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DbLabel: Engineering Source
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  Data: Effect of the simultaneous substitution of two transition metals on the structural, magnetic and electrical properties of La<subscript>0.6</subscript>Sr<subscript>0.4</subscript>Mn<subscript>1−2x </subscript>Cr<subscript> x </subscript>Fe<subscript> x </subscript>O<subscript>3</subscript>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Magnetism+%26+Magnetic+Materials%22">Journal of Magnetism & Magnetic Materials</searchLink>. Nov2010, Vol. 322 Issue 21, p3416-3422. 7p.
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  Data: Abstract: The structural, magnetic and electrical properties of Cr and Fe simultaneously substituted in the perovskite La0.6Sr0.4Mn1−2x Cr x Fe x O3 have been studied. The presence of Cr and Fe had no significant effect on the structural properties. Curie temperature and saturation magnetization decrease with increase in Cr and Fe contents. For x=0.20 and 0.25, a steep drop of zero field-cooled (ZFC) magnetization at low temperature signifies the formation of cluster- or spin-glass state. A weak hysteresis at low fields seems to be an indication of phase separation. All the resulting magnetization curves can be explained by a superposition of both ferromagnetic and antiferromagnetic components. All the samples are semiconducting throughout the temperature range studied. Resistivity can be described by the adiabatic small polaron hopping and the variable range hopping model. It was found that the transport mechanism is dominated by the VRH model with an increase of Mott localization energy, which explains the increase of resistivity. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Magnetism & Magnetic Materials 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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      – Type: doi
        Value: 10.1016/j.jmmm.2010.06.038
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      – Code: eng
        Text: English
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        PageCount: 7
        StartPage: 3416
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      – SubjectFull: Transition metals
        Type: general
      – SubjectFull: Electric properties of metals
        Type: general
      – SubjectFull: Magnetic properties of metals
        Type: general
      – SubjectFull: Perovskite
        Type: general
      – SubjectFull: Curie temperature
        Type: general
      – SubjectFull: Magnetization
        Type: general
      – SubjectFull: Zero-point field
        Type: general
      – SubjectFull: Spin glasses
        Type: general
      – SubjectFull: Antiferromagnetism
        Type: general
    Titles:
      – TitleFull: Effect of the simultaneous substitution of two transition metals on the structural, magnetic and electrical properties of La0.6Sr0.4Mn1−2x Cr x Fe x O3
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            NameFull: Ben Abdelkhalek, Sonia
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            NameFull: Kallel, Nabil
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            NameFull: Kallel, Sami
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            NameFull: Peña, Octavio
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            – D: 01
              M: 11
              Text: Nov2010
              Type: published
              Y: 2010
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              Value: 322
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