Isothermal anisotropic magnetoresistance in antiferromagnetic metallic IrMn

Galceran, R. and Fina, I. and Cisneros-Fernandez, J. and Bozzo, B. and Frontera, C. and Lopez-Mir, L. and Deniz, H. and Park, K-W. and Park, B-G. and Balcells, Ll. and Marti, X. and Jungwirth, T. and Martinez, B. (2016) Isothermal anisotropic magnetoresistance in antiferromagnetic metallic IrMn. Scientific Reports, 6 . 35471/1-35471/6. ISSN 2045-2322

[img]
Preview
PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Available under Licence Creative Commons Attribution.
Download (790kB) | Preview

Abstract

Antiferromagnetic spintronics is an emerging field; antiferromagnets can improve the functionalities of ferromagnets with higher response times, and having the information shielded against external magnetic field. Moreover, a large list of aniferromagnetic semiconductors and metals with Néeltemperatures above room temperature exists. In the present manuscript, we persevere in the quest for the limits of how large can anisotropic magnetoresistance be in antiferromagnetic materials with very large spin-orbit coupling. We selected IrMn as a prime example of first-class moment (Mn) and spin-orbit(Ir) combination. Isothermal magnetotransport measurements in an antiferromagnetic-metal(IrMn)/ferromagnetic-insulator thin film bilayer have been performed. The metal/insulator structure with magnetic coupling between both layers allows the measurement of the modulation of the transport

properties exclusively in the antiferromagnetic layer. Anisotropic magnetoresistance as large as 0.15% has been found, which is much larger than that for a bare IrMn layer. Interestingly, it has been observed that anisotropic magnetoresistance is strongly influenced by the field cooling conditions, signaling the dependence of the found response on the formation of domains at the magnetic ordering temperature.

Item Type: Article
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number: https://doi.org/10.1038/srep35471
Depositing User: Jungwirth, Tomas
Date Deposited: 02 Feb 2017 15:01
Last Modified: 02 Feb 2017 15:04
URI: http://eprints.nottingham.ac.uk/id/eprint/40262

Actions (Archive Staff Only)

Edit View Edit View