Photoinduced switching between charge and orbital ordered insulator and ferromagnetic metal in perovskite manganites
Photoinduced switching between charge and orbital ordered insulator and ferromagnetic metal in perovskite manganites
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DOI：
10.1103/physrevb.77.094410
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发表时间：
2008-03
影响因子：
3.7
通讯作者：
M. Matsubara;Y. Okimoto;T. Ogasawara;S. Iwai;Y. Tomioka;H. Okamoto;Y. Tokura
中科院分区：
文献类型：
--
作者：
M. Matsubara;Y. Okimoto;T. Ogasawara;S. Iwai;Y. Tomioka;H. Okamoto;Y. Tokura
Photoinduced switching in perovskite manganites by irradiation of a femtosecond laser pulse was investigated on ${\mathrm{Pr}}_{0.55}{({\mathrm{Ca}}_{1\ensuremath{-}y}{\mathrm{Sr}}_{y})}_{0.45}\mathrm{Mn}{\mathrm{O}}_{3}$ locating in the critical region between the charge and orbital ordered insulator (CO/OOI) phase and the ferromagnetic metal (FM) phase. For a low excitation density, the charge and orbital order is partially melted and the microscopic quasi-FM domains are generated, which rapidly return to the CO/OOI state. When the excitation density exceeds a threshold, the CO/OOI phase transforms permanently to the FM one. The stabilization of the photoinduced FM state is attributable to the large relaxation of the lattice deformations through the percolation of the microscopic quasi-FM domains.
Photoinduced switching in perovskite manganites by irradiation of a femtosecond laser pulse was investigated on ${\mathrm{Pr}}_{0.55}{({\mathrm{Ca}}_{1\ensuremath{-}y}{\mathrm{Sr}}_{y})}_{0.45}\mathrm{Mn}{\mathrm{O}}_{3}$ locating in the critical region between the charge and orbital ordered insulator (CO/OOI) phase and the ferromagnetic metal (FM) phase. For a low excitation density, the charge and orbital order is partially melted and the microscopic quasi-FM domains are generated, which rapidly return to the CO/OOI state. When the excitation density exceeds a threshold, the CO/OOI phase transforms permanently to the FM one. The stabilization of the photoinduced FM state is attributable to the large relaxation of the lattice deformations through the percolation of the microscopic quasi-FM domains.