Tuning the Coexistence Regime of Incomplete and Tubular Skyrmions in Ferromagnetic/Ferrimagnetic/Ferromagnetic Trilayers

Oğuz Yıldırım; Riccardo Tomasello; Yaoxuan Feng; Giovanni Carlotti; Silvia Tacchi; Pegah Mirzadeh Vaghefi; Anna Giordano; Tanmay Dutta; Giovanni Finocchio; Hans J. Hug; Andrada-Oana Mandru

doi:10.1021/acsami.2c06608

journal article·2022-07-27Open access

Tuning the Coexistence Regime of Incomplete and Tubular Skyrmions in Ferromagnetic/Ferrimagnetic/Ferromagnetic Trilayers

Oğuz Yıldırım, Riccardo Tomasello, Yaoxuan Feng, Giovanni Carlotti, Silvia Tacchi, Pegah Mirzadeh Vaghefi, Anna Giordano, Tanmay Dutta, Giovanni Finocchio, Hans J. Hug, Andrada-Oana Mandru

ACS Applied Materials & Interfaces· Volume 14· Issue 29

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Abstract

The development of skyrmionic devices requires a suitable tuning of material parameters to stabilize skyrmions and control their density. It has been demonstrated recently that different skyrmion types can be simultaneously stabilized at room temperature in heterostructures involving ferromagnets, ferrimagnets, and heavy metals, offering a new platform of coding binary information in the type of skyrmion instead of the presence/absence of skyrmions. Here, we tune the energy landscape of the two skyrmion types in such heterostructures by engineering the geometrical and material parameters of the individual layers. We find that a fine adjustment of the ferromagnetic layer thickness, and thus its magnetic anisotropy, allows the trilayer system to support either one of the skyrmion types or the coexistence of both and with varying densities.

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Research context

OpenAlex topics: Magnetic properties of thin films · Multiferroics and related materials · Metamaterials and Metasurfaces Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Empa, Swiss Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland

Department of Electrical and Information Engineering, Politecnico di Bari, 70125 Bari, Italy

Dipartimento di Fisica e Geologia, Università di Perugia, 06123 Perugia, Italy

Istituto Officina dei Materiali del CNR (CNR-IOM), Sede Secondaria di Perugia, c/o Dipartimento di Fisica e Geologia, Università di Perugia, 06123 Perugia, Italy

Department of Mathematical and Computer Sciences, Physical Sciences and Earth Sciences, University of Messina, I-98166 Messina, Italy

Department of Physics, University of Basel, CH-4056 Basel, Switzerland

Funding

Ministero dell?Istruzione, dell?Universit? e della Ricerca · H2020 Marie Sklodowska-Curie Actions · Eidgen?ssische Materialpr?fungs- und Forschungsanstalt

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