Experimental study of the magnetic signature of basal-plane anisotropy in hematite

Karl Fabian*, Peter Robinson, Suzanne A. McEnroe, Florian Heidelbach, Ann M. Hirt

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The crystal symmetry of hematite in the basal plane predicts three easy magnetization axes for the sublattice spin orientation above the Morin transition. Spin canting then leads to three preferred magnetization axes perpendicular to these easy axes. By combining detailed crystallographic orientation by EBSD measurements with dense magnetic hysteresis and remanence curves as a function of rotation angle, the relation between crystallography and magnetic properties has been experimentally verified for the basal plane of a natural hematite crystal. The measurements lead to a better understanding of the interplay between spin canting, remanence and magnetic susceptibility at different field strengths. The measurement results coincide qualitatively with theoretical predictions, and provide experimental evidence for quantitative evaluation by more complex micromagnetic modeling.

Original languageEnglish
Title of host publicationThe Earth's magnetic interior
EditorsEduard Petrovsky, Emilio Herrero-Bervera, T Harinarayana, David Ivers
Place of PublicationBerlin; New York
PublisherSpringer, Springer Nature
Pages311-320
Number of pages10
ISBN (Print)9789400703223
DOIs
Publication statusPublished - 2011
Externally publishedYes

Publication series

NameIAGA Special Sopron Book Series
PublisherSpringer
Volume1

Cite this

Fabian, K., Robinson, P., McEnroe, S. A., Heidelbach, F., & Hirt, A. M. (2011). Experimental study of the magnetic signature of basal-plane anisotropy in hematite. In E. Petrovsky, E. Herrero-Bervera, T. Harinarayana, & D. Ivers (Eds.), The Earth's magnetic interior (pp. 311-320). (IAGA Special Sopron Book Series; Vol. 1). Berlin; New York: Springer, Springer Nature. https://doi.org/10.1007/978-94-007-0323-0_22