scholarly journals Surface morphology, magnetic resonance and antistatic properties of fabric with carbon coating, modified by metal clusters

2020 ◽  
pp. 79-83
Author(s):  
A. G. Anisovich ◽  
I. P. Akula ◽  
A. P. Laskovnev ◽  
M. I. Markevich ◽  
N. M. Chekan
Keyword(s):  
Magnetic Resonance ◽  
Spectral Line ◽  
Carbon Coating ◽  
Metal Clusters ◽  
Resonant Absorption ◽  
Epr Spectrum ◽  
G Factor ◽  
Cathodic Arc Deposition ◽  
Calibration Sample ◽  
Cathodic Arc

The morphology of the surface, the magnetic resonance and antistatic properties of the 07C11-KV blended fabric manufactured by Mogotex LLC with a carbon coating doped with metal clusters are studied.The coating was applied by pulsed cathodic-arc deposition in vacuum of 3.5 · 10–3 Pa. It is established that during the coatinga droplet phase is formed. The size of the drops reaches 20 – 25 microns. The result of measuring the surface resistivity on fabric 1 side / 2 side is 3.2 · 107 and 1.9 · 107 Om, respectively. On the EPR spectrum are recorded two lines. The first line is a broad spectral line with an effective g-factor of 2.27 ± 0.01 and a width of 94.4 mT. The second line is narrow spectral line with an effective g-factor of 2.04 ± 0.01 and a width of 4.3 mT. This is corresponds to carbon coating clusters.From the ratio of the signal intensities of the filled resonator and the calibration sample, it follows that the non-resonant absorption of the microwave electromagnetic field in the system is slightly attenuated.

scholarly journals Creation and research of antistatic carbon coatings on fabric 05С8-КВ, modified by metal clusters

2020 ◽  
pp. 113-117
Author(s):  
A. G. Anisovich ◽  
I. P. Akula ◽  
A. P. Laskovnev ◽  
M. I. Markevich ◽  
N. M. Chekan
Keyword(s):  
Spectral Line ◽  
Carbon Coating ◽  
Metal Clusters ◽  
Local Concentration ◽  
High Concentration ◽  
Epr Spectrum ◽  
Carbon Coatings ◽  
G Factor ◽  
12X18h10t Steel ◽  
Coated Fabric

Application modes have been developed and carbon coatings modified with metal clusters on 05S8-KV fabric (manufacturer OJSC Mogotex) were created. The surface morphology of this coated fabric was investigated. It was shown that during the deposition of coatings from 12X18H10T steel targets a droplet phase is present on the coatings (the maximum droplet size reaches 3.5 μm). The paramagnetic absorption of the system carbon coating – clusters from the 12X18H10T steel target is investigated. It was found that the EPR spectrum contains a spectral line 94.4 mt wide, which indicates a high concentration of magnetic resonance centers, the effective value of the g-factor is 2.26 ± 0.01. In addition, a narrow spectral line with an effective g-factor of 2.04 ± 0.01 is recorded in the spectrum, the linewidth is 4.3 mt, which is associated with a high local concentration of unpaired electrons in carbon clusters with a weak nonresonant absorption at UHF (ultra-high frequrncy). The result of measuring the specific surface resistance on fabrics with this coating (side 1 / side 2) is 2.3.109 and 4.8.109 ohms, respectively, which is slightly lower than for a pure carbon coating.

Spin Resonance

2018 ◽  
Author(s):  
M. M. Glazov
Keyword(s):  
Magnetic Resonance ◽  
Nuclear Spin ◽  
Electromagnetic Waves ◽  
Zeeman Splitting ◽  
Resonant Absorption ◽  
Magnetic Interactions ◽  
Spin Effects ◽  
Crystalline Environment ◽  
Spin Resonance ◽  
Optically Detected

This chapter is devoted to one of key phenomena in the field of spin physics, namely, resonant absorption of electromagnetic waves under conditions where the Zeeman splitting of spin levels in magnetic field is equal to photon energy. This method is particularly important for identification of nuclear spin effects, because resonance spectra provide fingerprints of different involved spin species and make it possible to distinguish different nuclear isotopes. As discussed in this chapter the nuclear magnetic resonance provides also an access to local magnetic fields acting on nuclear spins. These fields are caused by the magnetic interactions between the nuclei and by the quadrupole splittings of nuclear spin states in anisotropic crystalline environment. Manifestations of spin resonance in optical responses of semiconductors–that is, optically detected magnetic resonance–are discussed.

scholarly journals Microresonators and Microantennas—Tools to Explore Magnetization Dynamics in Single Nanostructures

2021 ◽  
Vol 7 (2) ◽  
pp. 28
Author(s):  
Hamza Cansever ◽  
Jürgen Lindner
Keyword(s):  
Magnetic Resonance ◽  
Spin Wave ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Relaxation Times ◽  
Magnetic Nanostructures ◽  
Microwave Frequency ◽  
Direct Access ◽  
Magnetization Dynamics ◽  
G Factor

The phenomenon of magnetic resonance and its detection via microwave spectroscopy provide insight into the magnetization dynamics of bulk or thin film materials. This allows for direct access to fundamental properties, such as the effective magnetization, g-factor, magnetic anisotropy, and the various damping (relaxation) channels that govern the decay of magnetic excitations. Cavity-based and broadband ferromagnetic resonance techniques that detect the microwave absorption of spin systems require a minimum magnetic volume to obtain a sufficient signal-to-noise ratio (S/N). Therefore, conventional techniques typically do not offer the sensitivity to detect individual micro- or nanostructures. A solution to this sensitivity problem is the so-called planar microresonator, which is able to detect even the small absorption signals of magnetic nanostructures, including spin-wave or edge resonance modes. As an example, we describe the microresonator-based detection of spin-wave modes within microscopic strips of ferromagnetic A2 Fe60Al40 that are imprinted into a paramagnetic B2 Fe60Al40-matrix via focused ion-beam irradiation. While microresonators operate at a fixed microwave frequency, a reliable quantification of the key magnetic parameters like the g-factor or spin relaxation times requires investigations within a broad range of frequencies. Furthermore, we introduce and describe the step from microresonators towards a broadband microantenna approach. Broadband magnetic resonance experiments on single nanostructured magnetic objects in a frequency range of 2–18 GHz are demonstrated. The broadband approach has been employed to explore the influence of lateral structuring on the magnetization dynamics of a Permalloy (Ni80Fe20) microstrip.

Corrosion resistance of TiN/TiAlN-coated ADI by cathodic arc deposition

2006 ◽  
Vol 421 (1-2) ◽  
pp. 182-190 ◽  
Author(s):  
Cheng-Hsun Hsu ◽  
Ming-Li Chen ◽  
Kuei-Laing Lai
Keyword(s):  
Corrosion Resistance ◽  
Cathodic Arc Deposition ◽  
Cathodic Arc ◽  
Arc Deposition

Structural Characteristics of Diamond-Like Carbon Films Synthesized by Different Methods

2017 ◽  
Vol 743 ◽  
pp. 112-117
Author(s):  
Alexander Zolkin ◽  
Anna Semerikova ◽  
Sergey Chepkasov ◽  
Maksim Khomyakov
Keyword(s):  
Amorphous Phase ◽  
Ion Beam ◽  
High Energy ◽  
Carbon Films ◽  
Ion Source ◽  
Ordered Structure ◽  
Deposition Technique ◽  
Cathodic Arc Deposition ◽  
Cathodic Arc ◽  
Arc Deposition

In the present study, the Raman spectra of diamond-like amorphous (a-C) and hydrogenated amorphous (a-C:H) carbon films on silicon obtained using the ion-beam methods and the pulse cathodic arc deposition technique were investigated with the aim of elucidating the relation between the hardness and structure of the films. The hardness of the samples used in the present study was 19 – 45 GPa. Hydrogenated carbon films were synthesized using END–Hall ion sources and a linear anode layer ion source (LIS) on single-crystal silicon substrates. The gas precursors were CH4 and C3H8, and the rate of the gas flow fed into the ion source was 4.4 to 10 sccm. The ion energies ranged from 150 to 600 eV. a-C films were deposited onto Si substrates using the pulse cathodic arc deposition technique. The films obtained by the pulse arc technique contained elements with an ordered structure. In the films synthesized using low- (150 eV) and high-energy (600 eV) ions beams, an amorphous phase was the major phase. The significant blurriness of the diffraction rings in the electron diffraction patterns due to a large film thickness (180 – 250 nm) did not allow distinctly observing the signals from the elements with an ordered structure against the background of an amorphous phase.

Microtribological properties of hard amorphous carbon protective coatings for thin-film magnetic disks and heads

1997 ◽  
Vol 211 (4) ◽  
pp. 365-372 ◽  
Author(s):  
V N Koinkar ◽  
B Bhushan
Keyword(s):  
Amorphous Carbon ◽  
Carbon Coating ◽  
Protective Coatings ◽  
Ion Beam ◽  
Crystal Silicon ◽  
Carbon Coatings ◽  
Magnetic Disks ◽  
Hydrogenated Amorphous Carbon ◽  
Hydrogenated Amorphous ◽  
Cathodic Arc

For long durability of magnetic media and head sliders, protective overcoats of hydrogenated amorphous carbon (a-C:H) are generally used. In this study, microtribological studies of hydrogenated amorphous carbon coatings deposited on a single-crystal silicon using three different deposition techniques—sputtering, ion beam and cathodic arc—were studied using atomic force/friction force microscopy (AFM/FFM). Roughnesses of all coatings at two scan sizes of 1 μm × 1 μm and 10 μm × 10 μm are comparable. Surface topography of sputtered carbon coating shows some particulates on the surface. Cathodic arc carbon coating exhibits the lowest coefficient of friction value followed by ion beam and sputtered carbon coatings. Microscratch and wear resistance and nanohardness of cathodic arc carbon coating are superior to those of ion beam and sputtered carbon coatings. Cathodic arc deposited carbon coatings are potential candidates for magnetic disks and heads.

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