Microstructure and Magnetic Properties of FePt Thin Films on SiO2/Si (100) and Si Substrates Prepared Under External Magnetic Field

Mokhtari, Parisa; Kameli, P.; Ehsani, M.H.; Esmaeily, Amir Sajad; Kalhori, H.; Salamati, H.

doi:10.1007/s10948-017-3998-4

J Supercond Nov Magn

2017

DOI: 10.1007/s10948-017-3998-4

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Microstructure and Magnetic Properties of FePt Thin Films on SiO2/Si (100) and Si Substrates Prepared Under External Magnetic Field

Parisa Mokhtari

P. Kameli

M.H. Ehsani

et al.

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Cited by 9 publications

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“…8 For example, Kadiri et al realized magnetically actuated helical microdevices by incorporating small amounts of FePt in their microstructures. 9 FePt has been prepared by a variety of methods including pulsed laser deposition, 10 vapor deposition 11 and high-vacuum magnetron-sputtering. 12 Electrodeposition, however, is a viable alternative, which allows to obtain, in a simple and cost-effective way, thick and continuous films on substrates with any shape.…”

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Electrodeposition of Equiatomic FePt Permanent Magnets from Non-Aqueous Electrolytes Based on Ethylene Glycol

Bernasconi¹,

Nova²,

Vidal³

et al. 2022

Meet. Abstr.

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The highly ordered L10 hard-magnetic phase of the equiatomic FePt alloy is of significant interest for a great number of magnetic applications, ranging from the realization of micromagnets for integrated sensors to the deposition of thin layers for vertical recording media [1]. In this context, the development of wet deposition processes able to yield high-quality layers of FePt represents a topic of considerable industrial relevance. Even though several aqueous-based electrodeposition approaches have been developed for the manufacturing of FePt, most formulations evidenced substantial technological limitations, specifically connected to the use of water as solvent (hydrogen evolution, oxygen contamination of the deposit...). From this point of view, non-aqueous electrolytes represent a promising alternative for the electrosynthesis of metallic layers. These alternative solvents are characterized by attractive applicative properties: they present wide electrochemical windows, are simple to prepare, formulated from relatively cheap components, almost unreactive with water and, in most cases, biodegradable. Thanks to these properties, they have been widely employed for the electrodeposition of metals [2], alloys [3] or composites [4]. The present work describes the deposition of FePt from a non-aqueous electrolyte based on ethylene glycol, which presents potential advantages over water-based baths in terms of gas evolution reduction and purity improvement of the obtained coatings. Deposition is carried out using Fe(III) and Pt(IV) as precursors and ammonium chloride as additive to enhance the quality of the coatings and their compositional uniformity. In this way, equiatomic FePt thin films characterized by a good morphology are easily obtained. These layers are subsequently characterized to assess their morphology, phase composition and magnetic properties. After annealing at 600 °C, the microstructure changes and the disordered face centered cubic phase present in the as-plated alloy evolves into the highly magneto-crystalline anisotropic L10 phase. As a consequence, the coercivity of the layers reaches values in excess of 10 kOe. [1] Lodder et al.; Encyclopedia of Materials: Science and Technology, pp. 1-10 (2005) [2] Abbott et al.; Phys. Chem. Chem. Phys. 8, 4265-4279 (2006) [3] Bernasconi et al.; J. Phys. Chem. B 124(47), 10739-10751 (2020) [4] Rosoiu et al.; Metals 10(11), 1455 (2020)

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confidence: 99%

Electrodeposition of Equiatomic FePt Permanent Magnets from Non-Aqueous Electrolytes Based on Ethylene Glycol

Bernasconi¹,

Nova²,

Vidal³

et al. 2022

Meet. Abstr.

View full text Add to dashboard Cite

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Ti Capping Layer Effects in Microstructure and Magnetic Properties of Sputter-Deposited FePt Thin Film

Jia

et al. 2017

J Supercond Nov Magn

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Preparation, Microstructure, and Magnetic Properties of Electrodeposited Nanocrystalline L10 FePt Films

Ying

Wang

Zheng

et al. 2020

J Supercond Nov Magn

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Microstructure and Magnetic Properties of FePt Thin Films on SiO2/Si (100) and Si Substrates Prepared Under External Magnetic Field

Cited by 9 publications

References 59 publications

Electrodeposition of Equiatomic FePt Permanent Magnets from Non-Aqueous Electrolytes Based on Ethylene Glycol

Electrodeposition of Equiatomic FePt Permanent Magnets from Non-Aqueous Electrolytes Based on Ethylene Glycol

Ti Capping Layer Effects in Microstructure and Magnetic Properties of Sputter-Deposited FePt Thin Film

Preparation, Microstructure, and Magnetic Properties of Electrodeposited Nanocrystalline L10 FePt Films

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