Iron for nickel substitution effects on magnetic and magnetocaloric properties of melt-spun Gd75(Ni1-xFex)25 alloys

Шишкин, Д. А.; Волегов, А. С.; Баранов, Н. В.

doi:10.1016/j.jnoncrysol.2018.06.021

Cited by 2 publications

(1 citation statement)

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“…İnce filmler üzerine uygulanan manyetik alan karşısında oluşan manyetizasyon (histerezis) eğrileri; a) +1400 ile -1400 Oe arasında b) +2800 ile -2800 Oe arasında c) +1400 ile -1400 Oe arasında d) +75000 ile -75000 Oe arasında Histerezis eğrilerinden Ms, Hc, Mr değerleri bulundu ve sonuçları Tablo 3 içerisinde verildi. Histerezis eğrisi sonuçları üretilen her üç alaşım film kaplamanın ferromanyetik malzeme davranışı sergilediğini gösterdi [69].…”

Section: şEkilunclassified

Elektrodepolama ile Üretilen CoNi Alaşım İnce Film Kaplamaların Yapısal ve Manyetik Özellikleri Üzerine Ek Katkı Maddelerinin Etkisi

Özdemir

2019

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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In this study; CoNi alloy thin film coatings were produced by electrodeposition method without additives and using additional additives (organic coumarin and thiourea). The structural and magnetic properties of the produced thin films were investigated. When coumarin was added to the bath composition, it was determined that cobalt in the film content decreased from 67.94% to 43.82%, when it was added to thiourea, it decreased to 34.33% and both films showed amorphous properties. Magnetization measurements were performed and hysteresis curves were obtained. Figure A. Hysteresis loops obtained from magnetic measurements of CoNi alloy thin films, and SEM images Purpose: In this study; It was aimed to produce CoNi alloy thin films by using coumarin and thiourea as an additive in the electrolyte and to investigate the structural and magnetic properties. The effects of additives on the amount of substance deposited in the thin film, crystal structure and magnetic properties (coercivity, saturation magnetization and permanent magnetization) were investigated. Theory and Methods: CoNi alloy thin films were produced by electrodeposition method. A potentiostat with constant direct current and voltage control as a power source was used in the setting. Platinum wire as the opposite electrode saturated calomel electrode (SCE) as the reference electrode and aluminum substrate as the working electrode were used. The structural and magnetic properties of the produced films were investigated by CV, ICP, XRD, SEM and VSM analyzes. Results: CoNi alloy thin films were successfully deposited on aluminum substrates. XRD measurements and SEM images obtained from thin films were analyzed. Thin films deposited with the additive of organic thiourea and coumarin did not crystallize and showed amorphous properties. It was confirmed by hysteresis loops that all three thin-film coatings produced exhibited ferromagnetic material behavior. It was seen that the additives had a significant effect on the amount of material in the alloy film, crystal structure, and magnetic properties. Conclusion: Organic coumarin and thiourea additives were found to significantly change the amount of cobalt and nickel in the deposited thin-film content. The amount of cobalt and nickel material changes the crystal structure, grain size and magneto-crystal anisotropy of the thin film. By controlling these changes, it was understood that the desired soft and hard magnetic materials could be produced.

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