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- Title
The phenomenon of magnetic exchange bias in ferromagnetic nanocomposites grown by electron beam evaporation.
- Authors
Radchenko, M. V.; Lashkarev, G. V.; Bugaiova, M. E.; Baibara, O. E.; Knoff, W.; Story, T.; Krushynskaya, L. A.; Stelmakh, Y. A.; Dumond, Y.
- Abstract
For the first time, in ferromagnetic nanocomposites Co/oO/Al2O3 formed by two-crucible electron beam evaporation with deposition on a policor substrate, the magnetic exchange bias was observed. It is associated with the magnetic interaction of the ferromagnetic metal core of Co nanoparticles with antiferromagnetic CoO layer on their surface. The low value of magnetic exchange bias is attributed to the small thickness of the CoO shell, inasmuch as the energy of exchange magnetic anisotropy, which decreases with diminishing the antiferromagnetic CoO layer thickness, cannot provide a significant increase of the coercive force when changing the magnetic field direction. The ferromagnetic nanocomposites with the magnetic exchange bias can be used as a bias magnetic layer for magnetoresistive sensors.
- Subjects
MAGNETIC fields; FERROMAGNETIC materials; FERROMAGNETISM; MAGNETIC field effects; MAGNETIC properties
- Publication
Semiconductor Physics, Quantum Electronics & Optoelectronics, 2018, Vol 21, Issue 2, p125
- ISSN
1560-8034
- Publication type
Article
- DOI
10.15407/spqeo21.02.125