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Media type:
E-Article
Title:
Coexistence of distinct skyrmion phases observed in hybrid ferromagnetic/ferrimagnetic multilayers
Contributor:
Mandru, Andrada-Oana;
Yıldırım, Oğuz;
Tomasello, Riccardo;
Heistracher, Paul;
Penedo, Marcos;
Giordano, Anna;
Suess, Dieter;
Finocchio, Giovanni;
Hug, Hans Josef
imprint:
Springer Science and Business Media LLC, 2020
Published in:Nature Communications
Language:
English
DOI:
10.1038/s41467-020-20025-2
ISSN:
2041-1723
Origination:
Footnote:
Description:
<jats:title>Abstract</jats:title><jats:p>Materials hosting magnetic skyrmions at room temperature could enable compact and energetically-efficient storage such as racetrack memories, where information is coded by the presence/absence of skyrmions forming a moving chain through the device. The skyrmion Hall effect leading to their annihilation at the racetrack edges can be suppressed, for example, by antiferromagnetically-coupled skyrmions. However, avoiding modifications of the inter-skyrmion distances remains challenging. As a solution, a chain of bits could also be encoded by two different solitons, such as a skyrmion and a chiral bobber, with the limitation that it has solely been realized in B20-type materials at low temperatures. Here, we demonstrate that a hybrid ferro/ferri/ferromagnetic multilayer system can host two distinct skyrmion phases at room temperature, namely tubular and partial skyrmions. Furthermore, the tubular skyrmion can be converted into a partial skyrmion. Such systems may serve as a platform for designing memory applications using distinct skyrmion types.</jats:p>