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    초록·키워드

    Two La0.8Ba0.2MnO3 thin films (thickness around 300 Å and 1500 Å) and three La0.7MnO3 thin films (thickness around 3500 Å) were grown on SrTiO3 (001) substrate using the off-axis magnetron sputtering technique or pulsed-laser deposition. The optical reflectance spectra of the samples were measured over a broad energy range from the far-infrared through the ultraviolet and at the temperatures between 20 and 330 K. To extract the optical constants of the films, the Drude-Lorentz model was used to fit all of the layers of this thin-film structure. From the parameters obtained, these studies reveal (i) the 1500 Å-thick La0.8Ba0.2MnO3 thin film exhibits the strongest Drude response at 20 K and (ii) the pronounced resonance in the mid-infrared in all thin films can be well understood in the framework of small polaron model. Bismuth-substituted heavy rare-earth iron garnet materials have attracted much attention in optical communication industries due to their small temperature coefficient of Faraday rotation, low optical absorption, and a low magnetic field for saturation [1]. Especially, (TbBi)3Fe5O12, and (HoBi)3Fe5O12 have recei ... 전체 초록 보기

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      UCI(KEPA) : I410-ECN-0101-2009-428-016707069