Synthesis and study of the magnetic characteristics of nanocrystalline cobalt films

Belyaev, B. A.; Izotov, A. V.; Kiparisov, S. Ya.; Skomorokhov, G. V.

doi:10.1134/s1063783408040136

Cited by 14 publications

(2 citation statements)

References 2 publications

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“…Thin Co films have been actively studied in con nection with designing devices for high density infor mation storage [1], magnetic field sensors [2], and applications for the UHF range [3][4][5]. The processes of magnetic film growth are sensitive to small changes in the deposition parameters, which makes it possible to control the magnetic properties in a wide range [6].…”

Section: Introductionmentioning

confidence: 99%

The structure and microwave permeability of thin cobalt films

et al. 2012

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An increase in the ferromagnetic resonance frequency from 3 to 5.5 GHz is discovered in thin Co films during an increase in the crystallite size from 6 to 70 nm. The structure change is achieved by increasing the deposition rate from 4.2 to 7.1 nm/min in direct current magnetron sputtering. The Co films possess a uniaxial crystallographic texture. The orientation of the texture axis varies with a variation in deposition parameters, which causes changes in the in plane magnetic anisotropy. A model to describe the discovered changes is proposed.

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Section: Introductionmentioning

confidence: 99%

The structure and microwave permeability of thin cobalt films

et al. 2012

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“…For example, products obtained from these materials, as a rule, possess an increased durability due to a substan tial increase in the hardness [1,2], which, in turn, is caused by the presence of defects with a high density, because boundaries of grains or crystallites have a clearly pronounced nonequilibrium structure. Soft magnetic materials based on multilayer nanocrystal line metal structures have a narrow ferromagnetic res onance (FMR) line and a high magnetic permeability in the microwave frequency range [3] when the sizes of crystallites are considerably less than the correlation length related to the exchange interaction between them [4]. In this case, the observed broadening of the FMR lines due to the random spread in the crystalline anisotropy axes in crystallites is reduced to the value determined by the actual damping in the material used.…”

Section: Introductionmentioning

confidence: 99%

Impedance spectra of thin permalloy films with a nanoisland structure

Belyaev

Drokin

2012

Phys. Solid State

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The behavior of the impedance spectra of island permalloy films prepared through vacuum evap oration onto optically polished glass ceramic substrates has been investigated in the frequency range from 0.0001 to 100 MHz. A resistor-capacitor model of the films has been developed and the model parameters, for which there is a good agreement with experimental data on the frequency dependences of the real and imaginary components of the impedance, have been determined. The specific features in the behavior of the electrical and physical characteristics with variations in the thickness of the sample and the gap between the measuring electrodes have been investigated. It has been found that the relative permittivity of the films under investigation reaches values ε ~ 10 7 -10 8 . The structural relaxation times have been calculated.

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