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PROBLEM TO BE SOLVED : To provide a thermoelectric conversion material which is stable and is nonpoisonous in air having superior thermoelectric conversion properties. SOLUTION : On an MgO substrate or an SrTiO3 substrate, an oxide thermoelectric conversion film is formed which has a composition of RE2-XMXCu1O4-Y (RE is at least one rare-earth element selected from among La, Pr, Nd, Sm, Eu, and Gd; M is at least one element selected from among Ce, Ba, Sr, and Ca, 0
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