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2D Magnetic Mesocrystals for Bit Patterned Media
Author(s) -
Guo Shanshan,
Xu Feng,
Wang Baomin,
Wang Ning,
Yang Huali,
Dhanapal Pravarthana,
Xue Fei,
Wang Junling,
Li RunWei
Publication year - 2018
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201800997
Subject(s) - patterned media , nanomagnet , materials science , magnetometer , nanocrystal , nanotechnology , magnetic anisotropy , substrate (aquarium) , dispersity , cantilever , fabrication , magnetic force microscope , magnetic domain , anisotropy , quantum dot , optoelectronics , single domain , single crystal , magnetic field , crystallography , magnetization , optics , composite material , grain size , medicine , oceanography , physics , alternative medicine , chemistry , pathology , quantum mechanics , geology , polymer chemistry
Abstract Bit patterned media exhibits great potential in satisfying the increasing demand for higher information storage density, but the present media fabrication technique is complicated. Here, a 2D magnetic mesocrystal with monodisperse CoFe 2 O 4 (CFO) nanocrystals is fabricated through a combination of nanoseeds layer growth and oxides self‐assembly method. The monodisperse CFO nanomagnets protrude from the substrate surface with perfect crystal facets, specific crystallographic orientation, and are fully relaxed. Systematic magnetic characterizations, such as dynamic cantilever magnetometry for single CFO nanocrystal, magnetic force microscopy, and superconducting quantum interference device magnetometry for large area, reveal the novel tilted magnetic anisotropy and the switchable single domain state. This work provides a new way to fabricate bit patterned media with controlled material structure simply by a nanoseeds‐mediated self‐assembly method.