Unconventional optical responses have been revealed for the perovskite manganese oxide, Pr1-xCaxMnO3, which is known to undergo the insulator-metal (I-M) transition relevant to the magnetic field induced melting of the charge-ordered (CO) state. Optical conductivity spectrum is drastically modified over 0-1 eV from a gap-like feature into a metallic band with application of magnetic field of 7 T. It was found that such an I-M transition can be caused by photo-excitation as well. The electrical conductivity and magnetization increase abruptly with irradiation of visible/IR laser, indicating the photo-melting of the CO state and the photo-generation of ferromagnetic metallic domains.
|ジャーナル||Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals|
|出版ステータス||Published - 1998|
|イベント||Proceedings of the 1998 TAPPI Metered Size Press Forum - New Orleans, LA, USA|
継続期間: 1998 4 30 → 1998 5 2
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