Influence of substrate temperature on structure, microstructure and magnetic properties of sputtered Fe–Ga thin films

Basumatary, Himalay; Chelvane, J. Arout; Rao, D.V. Sridhara; Kamat, S.V.; Ranjan, Rajeev

doi:10.1016/j.jmmm.2015.02.021

Cited by 42 publications

(16 citation statements)

References 24 publications

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“…12,13 The film composition was estimated to be Gd 19 Fe 81 . The disparity in composition between the target and the film occurs due to the difference in vapor pressure at melting point for Fe and Gd.…”

Section: Resultsmentioning

confidence: 99%

Tailoring magnetic domains in Gd-Fe thin films

2018

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This paper presents the global modification of magnetic domains and magnetic properties in amorphous Gd19Fe81 thin films with rapid thermal processing at two distinct temperatures (250oC and 450oC), and with different time intervals viz., 2, 5, 10 and 20 minutes. 100 nm thick as-prepared films display nano-scale meandering stripe domains with high magnetic phase contrast which is the signature of perpendicular magnetic anisotropy. The films processed at 250oC for various time intervals show successive reduction in magnetic phase contrast and domain size. The domain pattern completely disappeared, and topography dominated mixed magnetic phase has been obtained for the films processed at 450oC for time intervals greater than 2 minutes. The magnetization measurements indicate the reduction in perpendicular magnetic anisotropy with increase in saturation magnetization for all the rapid thermal processed films. The experimental outputs have been used to simulate the domain pattern. Reduction in uniaxial anisotropy along with the increase in saturation magnetization successfully explain the experimental trend of decrease in domain size and magnetic contrast.

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Section: Resultsmentioning

confidence: 99%

Tailoring magnetic domains in Gd-Fe thin films

2018

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“…Meanwhile, the size and surface roughness of the catalyst film increased with the thickness of the film. For the film with larger thickness, a longer deposition time during the magnetron sputtering process results in the increment in substrate temperature and nucleation rate, which leads to a larger particle size on the surface of the catalyst film [13]. Further, the melting point of the alloy is generally lower than that of the single metal, so the particle size and surface roughness of the Cu-Cr catalyst film is bigger than that of the Cu catalyst film, as shown in Figure 1c Figure 2 shows SEM images of different CNSs after C2H2/H2-CVD, where the inserts are the SEM images of the corresponding catalyst films annealed in a H2 atmosphere.…”

Section: Methodsmentioning

confidence: 99%

Controllable Synthesis of Special Reed-Leaf-Like Carbon Nanostructures Using Copper Containing Catalytic Pyrolysis for High-Performance Field Emission

et al. 2019

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Special reed-leaf-like carbon nanostructures have been realized by using chemical vapor deposition (CVD) under the combined action of copper containing catalytic pyrolysis and ammonia (NH3) gas. The nucleation and growth mechanisms of CNLs based on growth parameters are discussed. The Raman spectra of carbon nanotubes (CNTs), CNLs and CNT-CNL composites were measured and found to be strongly influenced by the type of gas. Field emission (FE) properties of CNL-CNT composites were observed with a lower turn-on electric field of 0.73 V/µm, and a higher current density of 18.0 mA/cm2 at an electric field of 2.65 V/µm, which are superior to those of CNTs and flower-like CNLs. This is because there are more field emitters in CNLs inter-planted in CNTs. We consider that the unique FE stability of CNTs and defects in CNLs play a synergetic role on the improved FE properties.

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“…So, Fe 100-x Ga x films are the suitable candidate of other magnetostrictive materials, e.g., Terfenol-D and Fe-Ga alloy, because of its superior synthetic properties [4]. Fe 100-x Ga x films for microsensor and microactuator development are possible [5].…”

Section: Introductionmentioning

confidence: 99%

“…This is beneficial to improve the performance of thin films. Basumatary et al report the microstructure and magnetic properties of Fe 100-x Ga x films deposited at different deposited temperatures [5]. The grain size and surface roughness increase with the increasing of substrate temperature.…”

Section: Introductionmentioning

confidence: 99%

Composition Regulation and Microstructure Characterization of Fe_100-xGa_x Films in the Manufacturing Industry

et al. 2021

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Fe100-xGax giant magnetostrictive films (GMF) are attracting ever increasing attention for their potential application to manufacturing integrated magnetostrictive displacement sensors. However, it is difficult to fabricate Fe100-xGax thin films with different compositions at will. The influence of compositions on alloy phases, grain sizes, film surface roughness, and magnetic domains of the films and magnetization of magnetron sputtered Fe100-xGax films was investigated. Changing the ratio of the pure iron slice areas to alloy target areas, the desired film composition was achieved by the improved Mosaic method. The morphologies, magnetic domain structure, microstructure, and compositions of Fe100-xGax films revealed by SEM, EDS, XRD, MFM, VSM, and TEM. The results show that there are <1 1 0 > texture in magnetron sputtered Fe100-xGax films. The sharp peak attributed to the A2 microstructure suggests that the film is crystalline. The magnetic domain structure of Fe100-xGax films presents a network form, and the domain width decreases with the decrease of gallium content. It is also found that the magnetic domains of the films are not uniform. The TEM result shows that there are some strip patterns in the films, and the diffraction ring is discontinuous because of the structure extinction. For a suitable candidate of microdevice applications in MEMS, the optimum composition film should be Fe83.25Ga16.75 film.

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Influence of substrate temperature on structure, microstructure and magnetic properties of sputtered Fe–Ga thin films

Cited by 42 publications

References 24 publications

Tailoring magnetic domains in Gd-Fe thin films

Tailoring magnetic domains in Gd-Fe thin films

Controllable Synthesis of Special Reed-Leaf-Like Carbon Nanostructures Using Copper Containing Catalytic Pyrolysis for High-Performance Field Emission

Composition Regulation and Microstructure Characterization of Fe_100-xGa_x Films in the Manufacturing Industry

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Influence of substrate temperature on structure, microstructure and magnetic properties of sputtered Fe–Ga thin films

Cited by 42 publications

References 24 publications

Tailoring magnetic domains in Gd-Fe thin films

Tailoring magnetic domains in Gd-Fe thin films

Controllable Synthesis of Special Reed-Leaf-Like Carbon Nanostructures Using Copper Containing Catalytic Pyrolysis for High-Performance Field Emission

Composition Regulation and Microstructure Characterization of Fe100-xGax Films in the Manufacturing Industry

Contact Info

Product

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Composition Regulation and Microstructure Characterization of Fe_100-xGa_x Films in the Manufacturing Industry