Achieving a high cutting-off frequency in the oriented CoFe2O4 nanocubes
Achieving a high cutting-off frequency in the oriented CoFe2O4 nanocubes
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在定向 CoFe2O4 纳米立方体中实现高截止频率
DOI:
10.1063/1.5000014
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发表时间:
2017-09
影响因子:
4
通讯作者:
Cheng Zhaohua
中科院分区:
文献类型:
--
作者:
Song Ningning;Gu Shangzhi;Zhou Jun;Xia Weixing;Zhang Panpan;Gul Qeemat;Wang Wei;Yang Haitao;Cheng Zhaohua
An effective way for the improvement of resonance frequency was demonstrated by the orientation of CoFe2O4 nanocubes (NCs) after applying a magnetic field. The magnetic holography image of the oriented CoFe2O4 NC arrays was obtained, and the vortex domain structure was found in single CoFe2O4 NCs, which greatly depends on dipolar interactions. Moreover, the cutting-off frequency of oriented CoFe2O4 NCs of 8.8 GHz is achieved with a slight increase in permeability at an extremely low mass fraction (about 10%). This work provides an effective way for optimizing the high-frequency properties of magnetic nanomaterials above GHz.
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