Magnetic ordering in (110) Eu films in an applied magnetic field View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2008-06

AUTHORS

S. Soriano, C. Dufour, K. Dumesnil, Ph. Mangin

ABSTRACT

Below its ordering temperature (TN = 90 K), bulk bcc Eu has a helical magnetic state with propagation vectors along the three equivalent 〈100〉 directions. In contrast, epitaxial (110)Eu films exhibit a unique magnetic ordering: the domain with a magnetic helix propagating along the in-plane [001] direction vanishes on cooling, at the expense of other domains with helices propagating along [100] and [010]. This paper is devoted to the study of the stability of the magnetic domains in an external magnetic field using neutron scattering experiments and macroscopic magnetization measurements. The helix propagating along the [001] direction can be restored by the application of an external field along this direction. On the contrary, when a magnetic field is applied along an intermediate direction, specifically [\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \bar 1 $$\end{document}10], the domain with a helix propagating along [001] is suppressed. Both effects depend on the film thickness. They are explained if one considers that, because of the low magnetic anisotropy of Eu, a helix with a propagation vector parallel to (or close to) the applied magnetic field is energetically more favourable than cycloidal structures with unchanged propagation vectors. Finally, the amplitudes of the propagation vectors and their directions (that are modified in films compared to bulk) do not vary under magnetic field. More... »

PAGES

469-478

Identifiers

URI

http://scigraph.springernature.com/pub.10.1140/epjb/e2008-00255-1

DOI

http://dx.doi.org/10.1140/epjb/e2008-00255-1

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1013872209


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