J. Phys. IV France
Volume 131, December 2005
Page(s) 43 - 47
Publié en ligne 18 janvier 2006
International Workshop on Electronic Crystals
S. Brazovskii, P. Monceau and N. Kirova
J. Phys. IV France 131 (2005) 43-47

DOI: 10.1051/jp4:2005131009

Bidirectional optical phase control between a charge-ordered insulator and a metal in manganite thin films

K. Miyano and N. Takubo

Research Center for Advanced Science and Technology, University of Tokyo, Tokyo 153-8904, Japan

Photoinduced phase transition in manganite thin films has been studied, in which electronic excitation and the heating effect of light is clearly distinguished for the first time. The observation of the clear transition has been possible through the use of thin films prepared on (110) substrates, which exhibit a well-developed first-order phase transition between a more isotropic metallic state and an anisotropic charge- and orbital-ordered insulating state. The in-plane anisotropy of the (110) substrate allows the shear deformation necessary for the first-order transition. The photoinduced effect was found in the hysteresis loop between the metallic and insulating states, which has been made fairly wide by the choice of the composition. Previous photoinduced transitions are reviewed and compared with the present case.

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