Back to Search
Start Over
Strong Interfacial Perpendicular Magnetic Anisotropy in Exchange-Biased NiO/Co/Au and NiO/Co/NiO Layered Systems
- Source :
- Materials, Volume 14, Issue 5, Materials, Vol 14, Iss 1237, p 1237 (2021)
- Publication Year :
- 2021
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2021.
-
Abstract
- The ability to induce and control the perpendicular magnetic anisotropy (PMA) of ferromagnetic layers has been widely investigated, especially those that offer additional functionalities (e.g., skyrmion stabilization, voltage-based magnetization switching, rapid propagation of domain walls). Out-of-plane magnetized ferromagnetic layers in direct contact with an oxide belong to this class. Nowadays, investigation of this type of system includes antiferromagnetic oxides (AFOs) because of their potential for new approaches to applied spintronics that exploit the exchange bias (EB) coupling between the ferromagnetic and the AFO layer. Here, we investigate PMA and EB effect in NiO/Co/Au and NiO/Co/NiO layered systems. We show that the coercive and EB fields increase significantly when the Co layer is coupled with two NiO layers, instead of one. Surrounding the Co layer only with NiO layers induces a strong PMA resulting in an out-of-plane magnetized system can be obtained without a heavy metal/ferromagnetic interface. The PMA arises from a significant surface contribution (0.74 mJ/m2) that can be enhanced up to 0.99 mJ/m2 by annealing at moderate temperatures (~450 K). Using field cooling processes for both systems, we demonstrate a wide-ranging control of the exchange bias field without perturbing other magnetic properties of importance.
- Subjects :
- Materials science
Annealing (metallurgy)
perpendicular magnetic anisotropy
Oxide
02 engineering and technology
lcsh:Technology
01 natural sciences
magnetic thin films
Article
Magnetization
chemistry.chemical_compound
0103 physical sciences
Antiferromagnetism
General Materials Science
lcsh:Microscopy
010306 general physics
lcsh:QC120-168.85
antiferromagnetic oxides
lcsh:QH201-278.5
Spintronics
Condensed matter physics
lcsh:T
Non-blocking I/O
021001 nanoscience & nanotechnology
Exchange bias
Ferromagnetism
chemistry
lcsh:TA1-2040
exchange bias
lcsh:Descriptive and experimental mechanics
Condensed Matter::Strongly Correlated Electrons
lcsh:Electrical engineering. Electronics. Nuclear engineering
lcsh:Engineering (General). Civil engineering (General)
0210 nano-technology
lcsh:TK1-9971
Subjects
Details
- Language :
- English
- ISSN :
- 19961944
- Database :
- OpenAIRE
- Journal :
- Materials
- Accession number :
- edsair.doi.dedup.....be8ff90a63ec620fb45f0b8b99e0e6ae
- Full Text :
- https://doi.org/10.3390/ma14051237