Magnetic Heat Capacity of Monoclinic (La_<0.8>Ca_<0.2>)MnO_3

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概要

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• Heat capacity of (La...Cag..)MnO. was measured by a laser-flash method. Ananomaly of the heat capacity with the entropy change of AS=0.54 cat/mol-Kwas observed near magnetic transition temperature T.. By assuming a simpleHeisenberg model, an exchange interaction constant was determined to be J:8.0 cat/mol. The value of the magnetic heat capacity at T. was AC=4.2R, whichis nearly equal to the value calculated from a double exchange model. The ana-lysis of the heat capacity near T. showed clearly that the transition is of secondorder and induced only by the change of electronic state.

• 社団法人日本物理学会の論文
• 1984-01-15

著者

• MITSUHASHI Takefumi

  National Institute for Materials Science

• TANAKA Junzo

  National Institute for Research in Inorganic Materials

• Tanaka Junzo

  National Institute For Materials Science

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