Light-Switchable Exchange-Coupled Magnet

doi:10.1021/acsaelm.9b00520

2019-11-18

PRE

DOI：10.1021/acsaelm.9b00520

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摘要

En 中文

A light-switchable hard magnet/soft magnet composite is described for which light irradiation breaks the exchange coupling between the two components. Heterostructure composites composed of nanometer scale particles of the hard magnet cobalt ferrite with the soft magnet manganese ferrite show a coherent response in magnetization versus applied field measurements, consistent with exchange coupling, which is disrupted upon illumination, causing an inflection at low fields corresponding to the soft magnet manganese ferrite. The light-induced decoupling of the exchange-coupled magnets can be attributed to the selective demagnetization at the surface of the ferrite nanoparticles, breaking the interferrite coupling.

Keyword:

ferrite magnets

exchange coupling

cobalt ferrite

manganese ferrite

nanomagnets

light-induced magnetization

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期刊

ACS Applied Electronic Materials

IF:

4.7

论文数:

5.1K

被引数:

1.4W

机构

University of Florida

学者数:

4.0W

论文数: 3.1W

被引数: 6.6W

State University System of Florida

学者数:

12.8W

论文数: 10.9W

被引数: 130

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