Observation of a chirality-induced exchange-bias effect

Описание

Тип публикации: статья из журнала

Год издания: 2019

Аннотация: Chiral magnetism that manifests in the existence of skyrmions or chiral domain walls offers an alternative way for creating anisotropies in magnetic materials that might have large potential for application in future spintronic devices. Here we show experimental evidence for an alternative type of in-plane exchange-bias effect presПоказать полностьюent at room temperature that is created from a chiral 90â domain wall at the interface of a ferrimagnetic-ferromagnetic Dy-Co/Ni-Fe bilayer system. The chiral interfacial domain wall forms due to the exchange coupling of Ni-Fe and Dy-Co at the interface and the presence of Dzyaloshinskii-Moriya interaction in the Dy-Co layer. As a consequence of the preferred chirality of the interfacial domain wall, the sign of the exchange-bias effect can be reversed by changing the perpendicular orientation of the Dy-Co magnetization. The chirality-created tunable exchange bias in Dy-Co/Ni-Fe is very robust against high in-plane magnetic fields (μ0H≤6T) and does not show any aging effects. Therefore, it overcomes the limitations of conventional exchange-bias systems.

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Издание

Журнал: Physical Review Applied

Выпуск журнала: Т. 12, 2

Номера страниц: 024047

ISSN журнала: 23317019

Авторы

  • Chen K. (Helmholtz-Zentrum Berlin für Materialien und Energie)
  • Philippi-Kobs A. (Deutsches Elektronen-Synchrotron DESY)
  • Lauter V. (Neutron Scattering Division,Neutron Sciences Dirct.,Oak Ridge National Laboratory)
  • Vorobiev A. (Department of Physics and Astronomy,Uppsala University)
  • Dyadkina E. (Swiss-Norwegian Beamlines,European Synchrotron Radiation Facility)
  • Yakovchuk V.Y. (Siberian Federal University)
  • Stolyar S. (Kirensky Institute of Physics SB RAS)
  • Lott D. (Institute for Materials Research,Helmholtz-Zentrum Geesthacht)

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