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Analysis of structural and magnetic phase transition behaviors of La1−x Sr x CrO3 by measurement of heat capacity with thermal relaxation technique

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Title: Analysis of structural and magnetic phase transition behaviors of La1−x Sr x CrO3 by measurement of heat capacity with thermal relaxation technique
Authors: Matsunaga, Yuhta1, Kawaji, Hitoshi2, Atake, Tooru2, Takahashi, Hiroki3, Hashimoto, Takuya1 takuya@chs.nihon-u.ac.jp
Source: Thermochimica Acta. Aug2008, Vol. 474 Issue 1/2, p57-61. 5p.
Subjects: Heat, Temperature, Calorimetry, Enthalpy
Abstract: Abstract: The heat capacity, C p , of the La1−x Sr x CrO3 system and its temperature dependence have been measured by a thermal relaxation technique. Both structural and magnetic phase transitions were detected at temperatures that can be surmised from the phase diagram proposed in previous studies. The observed variation in enthalpy after the first-order structural phase transition, ΔH, showed agreement with those measured by differential scanning calorimetry (DSC). A decrease in the variation in C p in the second-order magnetic phase transition, ΔC p , with an increase in Sr content was detected, which can be attributed to a decrease in electronic spin configuration entropy with an increase in Sr content. In the dependence of ΔC p on Sr content, a bending point was also observed at x ∼0.12, at which the crystal system varies from an orthorhombic-distorted perovskite structure to a rhombohedral-distorted perovskite structure. [Copyright &y& Elsevier]
Copyright of Thermochimica Acta 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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DbLabel: Engineering Source
An: 33386949
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Analysis of structural and magnetic phase transition behaviors of La<subscript>1−x </subscript>Sr<subscript> x </subscript>CrO<subscript>3</subscript> by measurement of heat capacity with thermal relaxation technique
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  Data: <searchLink fieldCode="AR" term="%22Matsunaga%2C+Yuhta%22">Matsunaga, Yuhta</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kawaji%2C+Hitoshi%22">Kawaji, Hitoshi</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Atake%2C+Tooru%22">Atake, Tooru</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Takahashi%2C+Hiroki%22">Takahashi, Hiroki</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Hashimoto%2C+Takuya%22">Hashimoto, Takuya</searchLink><relatesTo>1</relatesTo><i> takuya@chs.nihon-u.ac.jp</i>
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  Data: <searchLink fieldCode="JN" term="%22Thermochimica+Acta%22">Thermochimica Acta</searchLink>. Aug2008, Vol. 474 Issue 1/2, p57-61. 5p.
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  Data: <searchLink fieldCode="DE" term="%22Heat%22">Heat</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature%22">Temperature</searchLink><br /><searchLink fieldCode="DE" term="%22Calorimetry%22">Calorimetry</searchLink><br /><searchLink fieldCode="DE" term="%22Enthalpy%22">Enthalpy</searchLink>
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  Label: Abstract
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  Data: Abstract: The heat capacity, C p , of the La1−x Sr x CrO3 system and its temperature dependence have been measured by a thermal relaxation technique. Both structural and magnetic phase transitions were detected at temperatures that can be surmised from the phase diagram proposed in previous studies. The observed variation in enthalpy after the first-order structural phase transition, ΔH, showed agreement with those measured by differential scanning calorimetry (DSC). A decrease in the variation in C p in the second-order magnetic phase transition, ΔC p , with an increase in Sr content was detected, which can be attributed to a decrease in electronic spin configuration entropy with an increase in Sr content. In the dependence of ΔC p on Sr content, a bending point was also observed at x ∼0.12, at which the crystal system varies from an orthorhombic-distorted perovskite structure to a rhombohedral-distorted perovskite structure. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Thermochimica Acta 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.tca.2008.06.005
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      – Code: eng
        Text: English
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        PageCount: 5
        StartPage: 57
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      – SubjectFull: Heat
        Type: general
      – SubjectFull: Temperature
        Type: general
      – SubjectFull: Calorimetry
        Type: general
      – SubjectFull: Enthalpy
        Type: general
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      – TitleFull: Analysis of structural and magnetic phase transition behaviors of La1−x Sr x CrO3 by measurement of heat capacity with thermal relaxation technique
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            NameFull: Matsunaga, Yuhta
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            NameFull: Kawaji, Hitoshi
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            NameFull: Atake, Tooru
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            NameFull: Takahashi, Hiroki
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            NameFull: Hashimoto, Takuya
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            – D: 15
              M: 08
              Text: Aug2008
              Type: published
              Y: 2008
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              Value: 474
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