Observation of thermally-induced magnetic relaxation in a magnetite grain using off-axis electron holography

File(s)

Almeida_2017_J._Phys.%3A_Conf._Ser._902_012001.pdf (893.62 KB)

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OA Location

http://iopscience.iop.org/article/10.1088/1742-6596/902/1/012001?pageTitle=IOPscience

Author(s)

Almeida, TP

Muxworthy, AR

Kovacs, A

Williams, W

Dunin-Borkowski, RE

Type

Journal Article

Abstract

A synthetic basalt comprising magnetic Fe3O4 grains (~ 50 nm to ~ 500 nm in diameter) is investigated using a range of complementary nano-characterisation techniques. Off-axis electron holography combined with in situ heating allowed for the visualisation of the thermally-induced magnetic relaxation of an Fe3O4 grain (~ 300 nm) from an irregular domain state into a vortex state at 550˚C, just below its Curie temperature, with the magnetic intensity of the vortex increasing on cooling.

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Date Issued

2017-10-19

Date Acceptance

2017-10-19

Citation

Journal of Physics : Conference Series, 2017, 902

URI

http://hdl.handle.net/10044/1/51929

DOI

https://www.dx.doi.org/10.1088/1742-6596/902/1/012001

ISSN

1742-6588

Publisher

Institute of Physics (IoP)

Journal / Book Title

Journal of Physics : Conference Series

Volume

902

Copyright Statement

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

License URL

http://creativecommons.org/licenses/by/4.0/

Sponsor

Natural Environment Research Council (NERC)

Grant Number

NE/J020508/1

Subjects

02 Physical Sciences

09 Engineering

Publication Status

Published

Article Number

012001