Study of the Phase Transition in BaSm_2Mn_2O_7

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概要

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• The existence of phase transition in BaSm_2Mn_2O_7 was revealed by high temperature X-ray diffractometry to be near 520 K. The phase transition is largely affected by the oxygen nonstoichiometry of this compound. For stoichiometric composition this phase has an orthorhombic distortion due to Jahn-Teller effect of Mn^<3+> ion and is transformed into a tetragonal phase above the transition temperature. Structure of the high temperature phase is isotypic with that of the oxygen nonstoichiometric phase at room temperature; the latter has a Sr_3Ti_2O_7-type crystal structure with double perovskite bloc.

• 社団法人応用物理学会の論文
• 1986-03-20

著者

• Kamegashira Naoki

  Department Of Materials Science Toyohashi University Of Technology

• Umeno Shigeru

  Department Of Materials Science Toyohashi University Of Technology

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