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Atomic Force Manipulation of Single Magnetic Nanoparticles for Spin-Based Electronics
Chalmers University of Technology, Sweden; Johannes Gutenberg University Mainz, Germany.
Chalmers University of Technology, Sweden; Institute of Materials Science of Barcelona , Spain.
RISE Research Institutes of Sweden, Digital Systems, Smart Hardware. Chalmers University of Technology, Sweden.ORCID iD: 0000-0002-6662-8023
Université Libre de Bruxelles, Belgium.
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2022 (English)In: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 16, no 11, p. 19253-19260Article in journal (Refereed) Published
Abstract [en]

Magnetic nanoparticles (MNPs) are instrumental for fabrication of tailored nanomagnetic structures, especially where top-down lithographic patterning is not feasible. Here, we demonstrate precise and controllable manipulation of individual magnetite MNPs using the tip of an atomic force microscope. We verify our approach by placing a single MNP with a diameter of 50 nm on top of a 100 nm Hall bar fabricated in a quasi-two-dimensional electron gas (q2DEG) at the oxide interface between LaAlO3 and SrTiO3 (LAO/STO). A hysteresis loop due to the magnetic hysteresis properties of the magnetite MNPs was observed in the Hall resistance. Further, the effective coercivity of the Hall resistance hysteresis loop could be changed upon field cooling at different angles of the cooling field with respect to the measuring field. The effect is associated with the alignment of the MNP magnetic moment along the easy axis closest to the external field direction across the Verwey transition in magnetite. Our results can facilitate experimental realization of magnetic proximity devices using single MNPs and two-dimensional materials for spin-based nanoelectronics. © 2022 The Authors. 

Place, publisher, year, edition, pages
American Chemical Society , 2022. Vol. 16, no 11, p. 19253-19260
Keywords [en]
atomic force microscopy, Hall magnetometry, LAO-STO interface, magnetic nanoparticles, nanomanipulation, oxide heterointerfaces, Aluminum compounds, Hysteresis, Hysteresis loops, Lanthanum compounds, Magnetic moments, Magnetic storage, Magnetite, Magnetization, Magnetometry, Nanomagnetics, Nanoparticles, Phase interfaces, Strontium titanates, Two dimensional electron gas, Atomic force, Atomic-force-microscopy, Hall resistance, Hetero-interfaces, Nanomanipulations, Oxide heterointerface, Spin-based electronics, Topdown, Titanium compounds
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:ri:diva-61186DOI: 10.1021/acsnano.2c08622Scopus ID: 2-s2.0-85141632910OAI: oai:DiVA.org:ri-61186DiVA, id: diva2:1712930
Note

Funding details: Generalitat de Catalunya, 2019 BP 00207; Funding details: Vetenskapsrådet, VR, 2016-05256; Funding details: Innoviris; Funding text 1: The authors gratefully acknowledge Prof. Tord Claeson for helpful discussions and critical reading of the manuscript. This work was funded by ERA-NET QUANTERA European Union’s Horizon H2020 project “QUANTOX” under Grant Agreement No. 731473 and Swedish Research Council (VR) Grant Number 2016-05256. We also acknowledge support from the Swedish infrastructure for micro- and nanofabrication: MyFab. C.M. and G.B. thank INNOVIRIS (Brussels region) for its financial support (Bridge 2019-RPF-2, SUBLIMUS). G.S. acknowledges financial support from the Beatriu de Pinós Programme and the Ministry of Research and Universities of the Government of Catalonia, with research Grant No. 2019 BP 00207.

Available from: 2022-11-23 Created: 2022-11-23 Last updated: 2022-11-23Bibliographically approved

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