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Overcoming the limits of exchange bias effect in the magnetic thin films by introducing nanostructured internal interfaces

Title
Overcoming the limits of exchange bias effect in the magnetic thin films by introducing nanostructured internal interfaces
Authors
Jung, Min-SeungKim, Tae-HwanIm, Mi-YoungHong, Jung-Il
DGIST Authors
Hong, Jung-Il
Issue Date
2020-01
Citation
Journal of Magnetism and Magnetic Materials, 494
Type
Article
Article Type
Article
Author Keywords
NanostructureInternal interfaceThin filmMagnetic couplingsExchange biasMultiphase mixture
Keywords
UNIDIRECTIONAL ANISOTROPYDEPENDENCETEMPERATURESYSTEM
ISSN
0304-8853
Abstract
Phase mixture single layer film with 3-dimensional spatial distribution of internal interfaces between ferromagnetic and antiferromagnetic nanoclusters was achieved through the inhomogeneous distribution of oxygen atoms within the ferromagnetic transition metal thin film layer. In the present work, enhanced exchange bias properties of phase mixture single layer film including both exchange and super-exchange couplings within the body of the single layer were investigated under various conditions. The film exhibited same exchange bias field regardless of the layer thickness, which violates the known relationship of inverse proportionality between the exchange bias field and the thickness of the magnetic layer in the conventional ferromagnet/antiferromagnet bilayers systems. Furthermore, it was found that the exchange bias could be set in any direction with respect to the film surface, removing the restriction by the magnetic shape anisotropy of the thin film structure. Low blocking temperature of the phase mixture single layer film could also be overcome with an additional neighboring antiferromagnet layer. © 2019 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/10850
DOI
10.1016/j.jmmm.2019.165814
Publisher
Elsevier BV
Related Researcher
  • Author Hong, Jung-Il Spin Nanotech Laboratory
  • Research Interests Electric and Magnetic Properties of Nanostructured Materials; Spintronics
Files:
There are no files associated with this item.
Collection:
Department of Emerging Materials ScienceSpin Nanotech Laboratory1. Journal Articles


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