Photonic Phase Control of Magnetic Oxides

Photonic Phase Control of Magnetic Oxides
复制标题

磁性氧化物的光子相位控制

DOI：
10.1080/10587259808044339
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
K. Miyano
K. Miyano
中科院分区：
--
文献类型：
--
作者：
Y. Okimoto;Y. Tokura;Y. Tomioka;Y. Onose;Y. Otsuka;K. Miyano

文献摘要

被引文献

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摘要钙钛矿锰氧化物Pr 1-xCaxMnO 3在磁场诱导下发生了与电荷有序态（CO）熔化有关的绝缘体金属（I-M）跃迁。在7 T的磁场作用下，电导率谱在0-1 eV范围内发生了明显的变化，从一个类似于间隙的特征转变为一个金属带。发现这种I-M跃迁也可以由光激发引起。电导率和磁化强度随着可见光/红外激光的照射而急剧增加，表明CO态的光熔化和铁磁金属畴的光产生。
Abstract Unconventional optical responses have been revealed for the perovskite manganese oxide, Pr1-xCaxMnO3, which is known to undergo the insulatormetal (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.