A Co(II)-based Molecular Magnet with a 6 T Coercive Field

Hard magnets with high coercivity, such as Nd2Fe14B and SmCo5 alloys, can maintain magnetisation under a high reverse external magnetic field and have therefore become irreplaceable parts in many practical applications. Molecular magnets are promising alternatives, owing to their precise and designa...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2017-09
Main Authors: Liu, Xiaoqing, Feng, Xiaowen, Zhang, Yuan, Zhang, Xuejing, Chen, Gao, Jun-Liang, Liu, Bing-Wu, Wang, Pedersen, Kasper S, Keller, Lukas, Yi-Quan, Zhang, Shi, Wei, Gao, Song, Cheng, Peng, Long, Jeffrey R
Format: Article
Language:English
Subjects:
Chains
Coercivity
Control methods
Coupling (molecular)
Heat exchange
Magnetic permeability
Magnets
Neutron diffraction
Neutrons
Organic chemistry
Samarium base alloys
Spin dynamics
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Hard magnets with high coercivity, such as Nd2Fe14B and SmCo5 alloys, can maintain magnetisation under a high reverse external magnetic field and have therefore become irreplaceable parts in many practical applications. Molecular magnets are promising alternatives, owing to their precise and designable chemical structures, tuneable functionalities and controllable synthetic methods. Here, we demonstrate that an unusually large coercive field can be achieved in a single-chain magnet. Systematic characterisations, including magnetic susceptibility, heat capacity and neutron diffraction measurements, show that the observed giant coercive field originates from the spin dynamics along the one-dimensional chain of the compound because of the strong exchange coupling between Co(II) centres and radicals.
ISSN:2331-8422