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[Problem] To provide a perovskite manganese oxide thin film that : (1) is capable of primary phase transition; and (2) is ordered at the A site. [Solution] The present invention provides a perovskite manganese oxide thin film (2) that includes Ba and a rare earth element at the A site formed on top of a substrate (1) and which has an (m10) orientation satisfying (m=2n; 9≧n≧1).