Skip to Main content Skip to Navigation
Journal articles

Magnetoresistance in Fe 0.8 Ga 0.2 thin films with magnetic stripes: The role of the three-dimensional magnetic structure

Abstract : In this work we show the existence of closure domains in Fe 0.8 Ga 0.2 thin films featuring a striped magnetic pattern and study the effect of the magnetic domain arrangement on the magnetotransport properties. By means of x-ray resonant magnetic scattering, we experimentally demonstrate the presence of such closure domains and also estimate their sizes and relative contribution to surface magnetization. Magnetotransport experiments show that the behavior of the magnetoresistance depends on the measurement geometry as well as on the temperature. When the electric current flows perpendicular to the stripe direction, the resistivity decreases when a magnetic field is applied along the stripe direction (negative magnetoresistance) in all the studied temperature range. Transport calculations in the Ohmic regime indicate that the main source is the anisotropic magnetoresistance. In the case of current flowing parallel to the stripe domains, the magnetoresistance changes sign, being positive at room temperature and negative at 100 K. An intrinsic magnetoresistant contribution arising from the domain walls appears as the most plausible explanation for the observed behavior. We have put in evidence the importance of using x-ray resonant magnetic scattering for the determination of thin-film properties related with the magnetic structure.
Complete list of metadatas

Cited literature [48 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-02927053
Contributor : Massimiliano Marangolo <>
Submitted on : Tuesday, September 15, 2020 - 10:17:00 PM
Last modification on : Wednesday, November 18, 2020 - 6:56:03 PM

File

 Restricted access
To satisfy the distribution rights of the publisher, the document is embargoed until : 2021-03-02

Please log in to resquest access to the document

Identifiers

Citation

B. Pianciola, S. Flewett, E. de Biasi, C. Hepburn, L. Lounis, et al.. Magnetoresistance in Fe 0.8 Ga 0.2 thin films with magnetic stripes: The role of the three-dimensional magnetic structure. Physical Review B, American Physical Society, 2020, 102 (5), ⟨10.1103/PhysRevB.102.054438⟩. ⟨hal-02927053⟩

Share

Metrics

Record views

32