Study of nanocrystalline thin cobalt films with perpendicular magnetic anisotropy obtained by thermal evaporation

Kozlowski, W.; Balcerski, J.; Szmaja, W.

doi:10.1016/j.jmmm.2016.09.111

Cited by 7 publications

(3 citation statements)

References 45 publications

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“…8, respectively. However, for thicker films, i.e., 70, 80, 90, and 100 nm-thick [47], we observed only perpendicular magnetization of the surface. Thus, the obtained results show that the transition from fully inplane to fully perpendicular magnetization takes place for film thicknesses comprised 40 and 70 nm.…”

Section: Resultscontrasting

confidence: 63%

Investigation of thermally evaporated nanocrystalline thin cobalt films

et al. 2017

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structures are of large importance. From the practical point of view, they are very significant for tailoring of the specimens with the required properties. In particular, they allow to develop high-density magnetic and magneto-optic recording media, modern recording heads, high-performance permanent magnets, magnetic sensors, and transformer steel sheets [1,2]. The knowledge of the magnetic domain behavior in relation to the morphological structure of the specimens is also important for theoretical modeling of magnetic properties [1,2].Thin magnetic films attract large attention from the fundamental as well as technological point of view. On the fundamental side, they exhibit different magnetic properties, such as magnetic anisotropy [3], magnetic microstructure [4], coercivity [5], and magnetoresistance [6], depending on their thickness, composition, crystalline structure, and preparation conditions. From the technological point of view, thin magnetic films have a number of applications; for example, they are used in magnetic information storage media, magneto-optic recording media, magnetic devices, and sensors [1,2].In particular, cobalt thin films have been the subject of wide and intense study in recent years. They can be prepared by various techniques, for example by sputtering, thermal evaporation, electron beam evaporation, molecular beam epitaxy, pulsed laser deposition, electrodeposition, and chemical vapor deposition [7][8][9]. The obtained films are usually nanocrystalline in nature and possess specific, improved mechanical, physical, magnetic, and chemical properties in comparison with conventional microcrystalline counterparts. Depending on the film thickness as well as the preparation method and conditions used, cobalt thin films exhibit a wide range of morphological and magnetic properties, and especially various magnetic domain structures with inplane and outofplane magnetization [10][11][12][13]. AbstractIn this paper, a study has been made of nanocrystalline thin cobalt films with thicknesses in the range from 10 to 60 nm. The films were thermally evaporated at incidence angle of 0° in a vacuum of about 10 − 5 mbar. The morphological structure of the films consists of nanocrystalline grains regular in shape and densely packed. As the film thickness is increased from 10 to 60 nm, the average grain size increases from 22.0 to 28.9 nm. The films crystallize mainly in the hexagonal close-packed phase of cobalt. The magnetic structure is composed of domains. In films with thicknesses in the range from 10 to 40 nm, the domains are magnetized in the plane of the film, while films with thicknesses of 50 and 60 nm possess both inplane and perpendicular magnetization components. The domains with inplane magnetization are irregular in shape and typically from a few to 10 mm in size, whereas the domains with perpendicular magnetization form a fine maze stripe pattern of the order of 100 nm in width.

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Section: Resultscontrasting

confidence: 63%

Investigation of thermally evaporated nanocrystalline thin cobalt films

et al. 2017

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“…10c). [28][29][30][31] It can also be seen from the results of the C 1s spectral analysis of Table 6 that the C-C functional group accounts for 74.8% of the C-type functional group. It's can be further proved that the main source of C is the surface physical adsorption of pollutants.…”

Section: Resultsmentioning

confidence: 84%

Study of a nanocrystalline cobalt coating prepared by area-selective electrodeposition

et al. 2020

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“…Typically, nanomagnets are patterned using a multistep procedure, involving resist-coating, electron-beam lithography, deposition of a thin film of a magnetic material such as cobalt, and lift-off. High-quality thin films of Co can be deposited in various ways, including ion beam sputtering, 10 electron-beam evaporation, 11 thermal evaporation, 11 , 12 electrolytic deposition, 13 metal–organic chemical vapor deposition (MOCVD), 14 molecular beam epitaxy (MBE), 15 and pulsed laser deposition (PLD). 16 Such a multistep patterning procedure is prone to introducing impurities in the devices in the form of residual resist particles as well as causing possible misalignment.…”

Section: Introductionmentioning

confidence: 99%

Scanning Nitrogen-Vacancy Magnetometry of Focused-Electron-Beam-Deposited Cobalt Nanomagnets

Žaper,

Rickhaus,

Wyss

et al. 2024

ACS Appl. Nano Mater.

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Focused-electron-beam-induced deposition is a promising technique for patterning nanomagnets in a single step. We fabricate cobalt nanomagnets in such a process and characterize their content, saturation magnetization, and stray magnetic field profiles by using a combination of transmission electron microscopy and scanning nitrogen-vacancy (NV) magnetometry. We find agreement between the measured stray field profiles and saturation magnetization with micromagnetic simulations. We further characterize magnetic domains and grainy stray magnetic fields in the nanomagnets and their halo sidedeposits. This work may aid in the evaluation of Co nanomagnets produced through focused electron-beam-induced deposition for applications in spin qubits, magnetic field sensing, and magnetic logic.

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Study of nanocrystalline thin cobalt films with perpendicular magnetic anisotropy obtained by thermal evaporation

Cited by 7 publications

References 45 publications

Investigation of thermally evaporated nanocrystalline thin cobalt films

Investigation of thermally evaporated nanocrystalline thin cobalt films

Study of a nanocrystalline cobalt coating prepared by area-selective electrodeposition

Scanning Nitrogen-Vacancy Magnetometry of Focused-Electron-Beam-Deposited Cobalt Nanomagnets

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