Reflection spectroscopy on the photoinduced local metallic phase of Pr0.7Ca0.3MnO3
Reflection spectroscopy on the photoinduced local metallic phase of Pr0.7Ca0.3MnO3
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DOI：
10.1063/1.123834
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发表时间：
1999-04-19
影响因子：
4
通讯作者：
Tokura, Y
中科院分区：
文献类型：
--
作者：
Fiebig, M;Miyano, K;Tokura, Y
利用光谱学和形貌技术研究了Pr0.7Ca0.3MnO3晶体的局部光致绝缘体-金属过渡（IMT）。虽然由于跃迁引起的反射率变化表现出IMT的特征，但与磁场诱导的块状IMT相比，光谱显示出强烈的变化。光致IMT的不同性质归因于铁磁性金属区与其反铁磁性绝缘周围的竞争，这可能导致丝状金属相。改进还包括在>1.8 eV光谱范围内明显的宽带电致变色。(C) 1999年美国物理研究所。[s0003 - 6951(99) 04916 - 5]。
Optical spectroscopy and topography techniques were used to study the local photoinduced insulator-metal transition (IMT) in a Pr0.7Ca0.3MnO3 crystal. Although the change of reflectivity due to the transition exhibits features which are characteristic for the IMT, the spectrum reveals strong modifications as compared to the magnetic-field induced bulk IMT. The different nature of the photoinduced IMT is attributed to the competition of the ferromagnetic metallic region with its antiferromagnetic insulating surrounding, which possibly leads to a filamentary metallic phase. Modifications also include a pronounced broadband electrochromism in the >1.8 eV spectral range. (C) 1999 American Institute of Physics. [S0003-6951(99)04916-5].