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Discrete Layer-by-Layer Magnetic Switching in Fe/MgO(001) Superlattices
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics. Univ Hassan II Casablanca, Fac Sci Ain Chock, LPMMAT, Post Box 5366 Maarif, Casablanca, Morocco..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics. Univ Iceland, Inst Sci, Dunhaga 3, IS-107 Reykjavik, Iceland..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
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2016 (English)In: PHYSICAL REVIEW APPLIED, ISSN 2331-7019, Vol. 5, no 4, 044011Article in journal (Refereed) PublishedText
Abstract [en]

We report on a discrete layer-by-layer magnetic switching in Fe/MgO superlattices driven by an antiferromagnetic interlayer exchange coupling. The strong interlayer coupling is mediated by tunneling through MgO layers with thicknesses up to at least 1.8 nm, and the coupling strength varies with MgO thickness. Furthermore, the competition between the interlayer coupling and magnetocrystalline anisotropy stabilizes both 90 degrees and 180 degrees periodic alignment of adjacent layers throughout the entire superlattice. The tunable layer-by-layer switching, coupled with the giant tunneling magnetoresistance of Fe/MgO/Fe junctions, is an appealing combination for three-dimensional spintronic memories and logic devices.

Place, publisher, year, edition, pages
2016. Vol. 5, no 4, 044011
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-297910DOI: 10.1103/PhysRevApplied.5.044011ISI: 000374562100001OAI: oai:DiVA.org:uu-297910DiVA: diva2:944276
Funder
Swedish Research CouncilKnut and Alice Wallenberg Foundation
Available from: 2016-06-29 Created: 2016-06-28 Last updated: 2016-06-29Bibliographically approved

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Magnus, FridrikWarnatz, TobiasPálsson, Gunnar KarlKapaklis, VassiliosHjörvarsson, Björgvin
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Materials Physics
Condensed Matter Physics

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