Ferrimagnetic/ferroelastic domain interactions in magnetite below the Verwey transition. Part I: electron holography and Lorentz microscopy

Kasama, Takeshi and Harrison, Richard J. and Church, Nathan S. and Nagao, Masahiro and Feinberg, Joshua M. and Dunin-Borkowski, Rafal E. (2013) Ferrimagnetic/ferroelastic domain interactions in magnetite below the Verwey transition. Part I: electron holography and Lorentz microscopy. Phase Transitions, 86 (1). pp. 67-87. ISSN 0141-1594 DOI 10.1080/01411594.2012.695373

Full text not available from this repository.
Official URL: http://www.tandfonline.com/doi/abs/10.1080/0141159...

Abstract

The crystallographic and magnetic microstructure of magnetite (Fe3O4) below the Verwey transition (∼120 K) is studied using transmission electron microscopy. The low temperature phase is found to have a monoclinic C-centered lattice with a c-glide plane perpendicular to the b-axis, which allows twin-related crystal orientations to be distinguished. Off-axis electron holography and Lorentz electron microscopy are used to show that magnetic domains present at room temperature become subdivided into sub-micron-sized magnetic domains below the Verwey transition, with the magnetization direction in each magnetic domain oriented along the monoclinic [001] axis. The nature of the interactions between the magnetic domain walls and the ferroelastic twin walls is investigated. Cooling and warming cycles through the transition temperature are used to show that a memory effect is likely to exist between the magnetic states that form above and below the transition. Our results suggest that ferroelastic twin walls have a strong influence on the low temperature magnetic properties of magnetite.

Item Type: Article
Additional Information: Special issue: Domain Boundary Engineering in Functional Oxides
Uncontrolled Keywords: 2012AREP; IA65;
Subjects: 03 - Mineral Sciences
Divisions: 03 - Mineral Sciences
Journal or Publication Title: Phase Transitions
Volume: 86
Page Range: pp. 67-87
Identification Number: 10.1080/01411594.2012.695373
Depositing User: Sarah Humbert
Date Deposited: 26 Jan 2013 11:25
Last Modified: 23 Jul 2013 10:05
URI: http://eprints.esc.cam.ac.uk/id/eprint/2663

Actions (login required)

View Item View Item

About cookies