Enhancement of coercivity of self-assembled stacking of ferrimagnetic and antiferromagnetic nanocubes

Keisuke Sawano; Keishi Tsukiyama; Makoto Shimizu; Mihiro Takasaki; Yuya Oaki; Takashi Yamamoto; Yasuaki Einaga; Christian Jenewein; Helmut Cölfen; Hideo Kaiju; Tetsuya Sato; Hiroaki Imai

doi:10.1039/C9NR10558A

Enhancement of coercivity of self-assembled stacking of ferrimagnetic and antiferromagnetic nanocubes†

Keisuke Sawano,

^a Keishi Tsukiyama,

^a Makoto Shimizu,^a Mihiro Takasaki,

^a Yuya Oaki,

^a Takashi Yamamoto,

^a Yasuaki Einaga,

^a Christian Jenewein,^b Helmut Cölfen,

^b Hideo Kaiju,^a Tetsuya Sato^a and Hiroaki Imai

*^a

Author affiliations

* Corresponding authors

^a School of Integrated Design Engineering, Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Japan
E-mail: hiroaki@applc.keio.ac.jp

^b Physical Chemistry, University of Konstanz, Universitätsstrasse 10, 78457 Konstanz, Germany

Abstract

The coercivity of magnetic nanoparticles is enhanced by the exchange coupling effect at the interface of ferrimagnetic and antiferromagnetic self-assembled monolayers. Antiferromagnetic Co₃O₄ nanocubes were regularly stacked on an ordered monolayer of ferrimagnetic Fe₃O₄ nanocubes by layer-by-layer manipulation using evaporation-driven self-assembly. The ordered arrangements of the ferrimagnetic and antiferromagnetic nanocubes are effective for the enhancement of the ferromagnetic character.

Nanoscale

Enhancement of coercivity of self-assembled stacking of ferrimagnetic and antiferromagnetic nanocubes†

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Enhancement of coercivity of self-assembled stacking of ferrimagnetic and antiferromagnetic nanocubes

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