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- Title
Preparation and electrical characterization of MES-type magnetodielectric system based on Co-Al-O nanogranular films.
- Authors
Tuan, Nguyen Anh; Tue, Nguyen Anh; Khanh, Hoang Quoc
- Abstract
The magnetodielectric (MD) material is a multifunctional material composited by many different functions from individual phenomena or effects. It can possess both the dielectric conductivity obeyed the Mott–Efros–Shklovskii (MES) laws, referred to as MES-MD for short, and other properties, such as MD, superparamagnetic phenomena, spin-dependent tunneling, spin accumulation or confinement, Coulomb blockade, spin blockade, and Kondo effect. The multifunctional feature is expected to give novel physical properties or effects in electron transport. This work reports, such an MES-MD system, based on Co-Al-O thin films with the Co components below the percolation threshold (< 30 at.% to ensure the MES-MD feature), has been fabricated. The initial manifestations for the MES-MD features of the Co-Al-O films were analyzed through the microstructure characteristics, magnetic properties, and especially the electrical transport behaviors. Typical features, in addition to the SPM attribute, include the Coulomb blockade and the local Kondo effects, which are mainly demonstrated through the current–voltage, I(V), and conductance–voltage, G(V), characteristics.
- Subjects
KONDO effect; MAGNETIC tunnelling; DIELECTRIC films; COULOMB blockade; THIN films; ELECTRON transport; MAGNETIC properties
- Publication
Journal of Materials Science: Materials in Electronics, 2021, Vol 32, Issue 12, p15643
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-021-06114-y