Epitaxial Photostriction鈥揗agnetostriction Coupled Self-Assembled Nanostructures
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- 作者：Heng-Jui Liu ; Long-Yi Chen ; Qing He ; Chen-Wei Liang ; Yu-Ze Chen ; Yung-Shun Chien ; Ying-Hui Hsieh ; Su-Jien Lin ; Elke Arenholz ; Chih-Wei Luo ; Yu-Lun Chueh ; Yi-Chun Chen ; Ying-Hao Chu
- 刊名：ACS Nano
- 出版年：2012
- 出版时间：August 28, 2012
- 年：2012
- 卷：6
- 期：8
- 页码：6952-6959
- 全文大小：568K
- 年卷期：v.6,no.8(August 28, 2012)
- ISSN：1936-086X
文摘
Self-assembled vertical nanostructures take advantage of high interface-to-volume ratio and can be used to design new functionalities by the choice of a proper combination of constituents. However, most of the studies to date have emphasized the functional controllability of the nanostructures using external electric or magnetic fields. In this study, to introduce light (or photons) as an external control parameter in a self-assembled nanostructure system, we have successfully synthesized oxide nanostructures with CoFe<sub>2sub>O<sub>4sub> nanopillars embedded in a SrRuO<sub>3sub> matrix. The combination of photostrictive SrRuO<sub>3sub> and magnetostrictive CoFe<sub>2sub>O<sub>4sub> in the intimately assembled nanostructures leads to a light-induced, ultrafast change in magnetization of the CoFe<sub>2sub>O<sub>4sub> nanopillars. Our work demonstrates a novel concept on oxide nanostructure design and opens an alternative pathway for the explorations of diverse functionalities in heteroepitaxial self-assembled oxide nanostructures.