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26 April 2024 |
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Anisotropy induced spin re-orientation in chemically-modulated amorphous ferrimagnetic films | | E. Kirk
; C. Bull
; S. Finizio
; H. Sepehri-Amin
; S. Wintz
; A.K. Suszka
; N.S. Bingham
; P. Warnicke
; K. Hono
; P.W. Nutter
; J. Raabe
; G. Hrkac
; T. Thomson
; L.J. Heyderman
; | | Date: |
7 Jul 2020 | | Abstract: | The ability to tune the competition between the in-plane and out-of-plane
orientation of magnetization provides a means to construct thermal sensors with
a sharp spin re-orientation transition at specific temperatures. We have
observed such a tuneable, temperature driven spin re-orientation in
structurally amorphous, ferrimagnetic rare earth-transition metal (RE-TM) alloy
thin films using scanning transmission X-ray microscopy (STXM) and magnetic
measurements. The nature of the spin re-orientation transition in FeGd can be
fully explained by a non-equilibrium, nanoscale modulation of the chemical
composition of the films. This modulation leads to a magnetic domain pattern of
nanoscale speckles superimposed on a background of in-plane domains that form
Laudau configurations in micron-scale patterned elements. It is this speckle
magnetic structure that gives rise to a sharp two step-reversal mechanism that
is temperature dependent. The possibility to balance competing anisotropies
through the temperature opens opportunities to create and manipulate
topological spin textures. | | Source: | arXiv, 2007.3657 | | Services: | Forum | Review | PDF | Favorites | |
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