Influence of the surface morphology on the magnetoresistance of ultrathin films of ferromagnetic metals and their alloys

. The microstructure, morphology and magnetoresistive properties of as-deposited and annealed at 700K discontinuous films of ferromagnetic metals and their alloys are investigated. It is established that the isotropic field dependences stemming from the spin-dependent electron tunneling between ferr...

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Bibliographic Details
Published in:European physical journal plus 2017-01, Vol.132 (1), p.58, Article 58
Main Authors: Chornous, A. M., Shkurdoda, Yu. O., Loboda, V. B., Shabelnyk, Yu. M., Kravchenko, V. O.
Format: Article
Language:English
Subjects:
Alloys
Annealing
Applied and Technical Physics
Atomic
Complex Systems
Condensed Matter Physics
Dependence
Electron spin
Electron tunneling
Ferromagnetic materials
Islands
Magnetic fields
Magnetic properties
Magnetoresistance
Magnetoresistivity
Mathematical and Computational Physics
Metals
Molecular
Morphology
Optical and Plasma Physics
Physics
Physics and Astronomy
Regular Article
Theoretical
Thickness
Thin films
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Summary:. The microstructure, morphology and magnetoresistive properties of as-deposited and annealed at 700K discontinuous films of ferromagnetic metals and their alloys are investigated. It is established that the isotropic field dependences stemming from the spin-dependent electron tunneling between ferromagnetic islands are observed for as-deposited Co films with an effective thickness ( d ) of d Co = 5-25 nm as well as for Fe films ( d Fe = 10-30 nm). It is shown that the maximum values of the isotropic magnetoresistance take place in the case when the size of the islands is equal to 3-5nm and the width of the dielectric barrier between them is 1-3nm. The maximum TMR values for the films annealed at 700 K are obtained when the dielectric barrier is 2-5 nm wide.
ISSN:2190-5444
2190-5444
DOI:10.1140/epjp/i2017-11327-x