標題: Strong magnetic enhancement in self-assembled multiferroic-ferrimagnetic nanostructures
作者: Chen, Ying-Jiun
Hsieh, Ying-Hui
Liao, Sheng-Chieh
Hu, Zhiwei
Huang, Meng-Jie
Kuo, Wei-Cheng
Chin, Yi-Ying
Uen, Tzeng-Ming
Juang, Jenh-Yih
Lai, Chih-Huang
Lin, Hong-Ji
Chen, Chien-Te
Chu, Ying-Hao
材料科學與工程學系
電子物理學系
Department of Materials Science and Engineering
Department of Electrophysics
公開日期: 2013
摘要: In the past decade, self-assembled vertical nano-heterostructures have drawn considerable attention because a high interface-to-volume ratio can be used to tailor or create functionalities. We have systematically investigated the magnetic properties of oxide heterostructures consisting of the CoFe2O4 nanopillars embedded in the BiFeO3 matrix using macroscopic magnetization measurements and element-selective soft X-ray absorption magnetic circular dichroism (XMCD) at the Co- and Fe-L-2,L-3 edge. The magnetization and XMCD data show that the total ordered magnetic moment of Co2+ in CoFe2O4-BiFeO3 nano-heterostructures is strongly enhanced. This study clearly indicates that the high interface-to-volume ratio vertical nanostructure creates a strong ferromagnetic and antiferromagnetic magnetic coupling via an interface. Furthermore, the magnetic coupling can be tuned in the multiferroic-ferrimagnetic self-assembled heterostructures by controlling the spacing between nanopillars.
URI: http://hdl.handle.net/11536/21963
http://dx.doi.org/10.1039/c3nr00104k
ISSN: 2040-3364
DOI: 10.1039/c3nr00104k
期刊: NANOSCALE
Volume: 5
Issue: 10
起始頁: 4449
結束頁: 4453
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