Enhanced Room-Temperature Ferromagnetism Observed in SiO2-Coated CuO Nanostructures

  • Xiaofang Bian
Original Paper


In this paper, the magnetic properties of pure CuO and SiO2-coated CuO nanocrystals were reported. Strongly enhanced room-temperature ferromagnetism was observed in SiO2-coated CuO nanocrystals, whose saturation magnetization is two orders of magnitude enhanced compared to that of the uncoated CuO nanocrystals. The mechanism of this enhancement was investigated. It points out the main origin of ferromagnetism in these CuO nanocrystals is the uncompensated surface state, so that the coating of SiO2 can effectively protect the surface state to improve the ferromagnetism in these CuO nanocrystals.


Nanocrystals Copper oxide Surface state Ferromagnetism 









X-ray diffraction


Scanning transmission electron microscopy


High-resolution transmission electron microscopy


Field cooled


Zero field cooled


Funding Information

This work is supported by the Higher Educational Science and Technology Program of Shandong Province, China (Grant No. J16LJ02); Natural Science Foundation of Shandong Province, China (ZR2016GM26); and the Key Laboratory of Public Security Management Technology in Universities of Shandong (Shandong Management University).


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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.College of Mechanical and Electrical EngineeringShandong Management UniversityJinanPeople’s Republic of China

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