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Research on charge-ordering state in La0.5Sr0.5MnO2.88 and La0.5Sr0.5Mn0.5Ti0.5O3 systems

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Title: Research on charge-ordering state in La0.5Sr0.5MnO2.88 and La0.5Sr0.5Mn0.5Ti0.5O3 systems
Authors: Kallel, Nabil Nabil.Kallel@fsm.rnu.tn, Ihzaz, Nejib1, Kallel, Sami1, Hagaza, Ahmed1, Oumezzine, Mohamed1
Source: Journal of Magnetism & Magnetic Materials. Aug2009, Vol. 321 Issue 15, p2285-2289. 5p.
Subjects: Ferromagnetism, Perovskite, Chemical systems, Electric conductivity, Doped semiconductors, X-ray diffraction
Abstract: Abstract: The structural, magnetic and transport properties of La0.5Sr0.5MnO2.88 and La0.5Sr0.5Mn0.5Ti0.5O3 samples have been investigated systematically. Indeed, this series has been considered to understand the influence of physical parameters such as oxygen deficiency and titanium doping effect in undoped La0.5Sr0.5MnO3 sample. Ceramic material based on La0.5Sr0.5MnO2.88 exhibits interesting behaviours of charge-ordering (CO), ferromagnetic (FM) states and a good conductivity down to the lowest temperatures. The substitution of Ti for Mn destroyed drastically the CO, damaged the motion of itinerant e g electrons and changed the local parameters of perovskite cell. A change of the structure from tetragonal to rhombohedral symmetry is observed causing a weakening of double-exchange interaction. The experiment results show that the suppression of the CO is sensitive to the variety of Mn3+/Mn4+ ratio. In a field of 8T at 10K, FM and CO phase can be evaluated to be ∼20:80 according to the μexp/μcal ratio for La0.5Sr0.5MnO2.88, whereas the CO state is suppressed for La0.5Sr0.5Mn0.5Ti0.5O3 sample, FM and anti-ferromagnetic (AFM) phase are coexisted and evaluated to be ∼54:46, respectively. [Copyright &y& Elsevier]
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.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 39893910
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Research on charge-ordering state in La<subscript>0.5</subscript>Sr<subscript>0.5</subscript>MnO<subscript>2.88</subscript> and La<subscript>0.5</subscript>Sr<subscript>0.5</subscript>Mn<subscript>0.5</subscript>Ti<subscript>0.5</subscript>O<subscript>3</subscript> systems
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  Data: <searchLink fieldCode="AR" term="%22Kallel%2C+Nabil%22">Kallel, Nabil</searchLink><i> Nabil.Kallel@fsm.rnu.tn</i><br /><searchLink fieldCode="AR" term="%22Ihzaz%2C+Nejib%22">Ihzaz, Nejib</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kallel%2C+Sami%22">Kallel, Sami</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Hagaza%2C+Ahmed%22">Hagaza, Ahmed</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Oumezzine%2C+Mohamed%22">Oumezzine, Mohamed</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Magnetism+%26+Magnetic+Materials%22">Journal of Magnetism & Magnetic Materials</searchLink>. Aug2009, Vol. 321 Issue 15, p2285-2289. 5p.
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  Data: <searchLink fieldCode="DE" term="%22Ferromagnetism%22">Ferromagnetism</searchLink><br /><searchLink fieldCode="DE" term="%22Perovskite%22">Perovskite</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+systems%22">Chemical systems</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+conductivity%22">Electric conductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Doped+semiconductors%22">Doped semiconductors</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+diffraction%22">X-ray diffraction</searchLink>
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  Label: Abstract
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  Data: Abstract: The structural, magnetic and transport properties of La0.5Sr0.5MnO2.88 and La0.5Sr0.5Mn0.5Ti0.5O3 samples have been investigated systematically. Indeed, this series has been considered to understand the influence of physical parameters such as oxygen deficiency and titanium doping effect in undoped La0.5Sr0.5MnO3 sample. Ceramic material based on La0.5Sr0.5MnO2.88 exhibits interesting behaviours of charge-ordering (CO), ferromagnetic (FM) states and a good conductivity down to the lowest temperatures. The substitution of Ti for Mn destroyed drastically the CO, damaged the motion of itinerant e g electrons and changed the local parameters of perovskite cell. A change of the structure from tetragonal to rhombohedral symmetry is observed causing a weakening of double-exchange interaction. The experiment results show that the suppression of the CO is sensitive to the variety of Mn3+/Mn4+ ratio. In a field of 8T at 10K, FM and CO phase can be evaluated to be ∼20:80 according to the μexp/μcal ratio for La0.5Sr0.5MnO2.88, whereas the CO state is suppressed for La0.5Sr0.5Mn0.5Ti0.5O3 sample, FM and anti-ferromagnetic (AFM) phase are coexisted and evaluated to be ∼54:46, respectively. [Copyright &y& Elsevier]
– 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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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.jmmm.2009.01.015
    Languages:
      – Code: eng
        Text: English
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        PageCount: 5
        StartPage: 2285
    Subjects:
      – SubjectFull: Ferromagnetism
        Type: general
      – SubjectFull: Perovskite
        Type: general
      – SubjectFull: Chemical systems
        Type: general
      – SubjectFull: Electric conductivity
        Type: general
      – SubjectFull: Doped semiconductors
        Type: general
      – SubjectFull: X-ray diffraction
        Type: general
    Titles:
      – TitleFull: Research on charge-ordering state in La0.5Sr0.5MnO2.88 and La0.5Sr0.5Mn0.5Ti0.5O3 systems
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      – PersonEntity:
          Name:
            NameFull: Kallel, Nabil
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            NameFull: Ihzaz, Nejib
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            NameFull: Kallel, Sami
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            NameFull: Hagaza, Ahmed
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            NameFull: Oumezzine, Mohamed
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            – D: 01
              M: 08
              Text: Aug2009
              Type: published
              Y: 2009
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              Value: 321
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              Value: 15
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            – TitleFull: Journal of Magnetism & Magnetic Materials
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