Visualisation of high temperature magnetisation states in magnetite grains using off-axis electron holography. (September 2015)

• Record Type: Journal Article
• Authors: Almeida, T P; Muxworthy, A R; Kovács, A; Williams, W; Dunin-Borkowski, R E
• Is Part Of: Journal of physics. Number 644(2015)
• Publication Date: 2015-09
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/644/1/012027
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: The production of a synthetic basalt comprising Fe3 O4 grains (∼ 50 nm to ∼ 500 nm), via a glass ceramic method, has been confirmed using transmission electron microscopy and X-ray diffractometry. Off-axis electron holography combined with in situ heating allowed for the visualisation of non-uniform vortex states present in saturation remanent structures, and their variation approaching the Curie temperature; determined separately by bulk thermomagnetic measurements.