Tuning microstructure and magnetic properties of electrodeposited CoNiP films by high magnetic field annealing

Wu, Chun; Wang, Kai; Li, Donggang; Lou, Changsheng; Zhao, Yue; Gao, Yang; Wang, Qiang

doi:10.1016/j.jmmm.2016.05.002

Cited by 19 publications

(12 citation statements)

References 24 publications

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“…After post-treatment at 200 °C, the Fe 2p binding energy increased to 710.5 and 723.8 eV, as shown in Fig. 4(b 1 ); this is closer to the values for Fe 3 O 4 (710.6 and 724.1 eV) [16]. The O 1 s binding energy of the as-synthesized FePt nanoparticles was 532.3 eV (Fig.…”

Section: Resultssupporting

confidence: 68%

“…The particles were washed repeatedly with ethanol, were centrifuged, and were finally dispersed in hexane at a concentration of about 5 mg/mL. In a typical post-treatment process, 2 mL of the as-synthesized FePt-hexane solution and 2 mL OAm were injected into a quartz crucible, which was placed inside a vertical tubular resistance furnace [16]. Then, the quartz crucible was heated to 150 or 200 °C at a rate of 5 °C/min, and held at that temperature for 1 h without a protective atmosphere.…”

Section: Methodsmentioning

confidence: 99%

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Post-treatment Method for the Synthesis of Monodisperse Binary FePt-Fe3O4 Nanoparticles

Liu

Niu

et al. 2017

Nanoscale Res Lett

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To obtain the optimal 1:1 composition of FePt alloy nanomaterials by polyol synthesis, the iron precursor (iron pentacarbonyl, Fe(CO)5) must be used in excess, because the Fe(CO)5 exists in the vapor phase at the typical temperatures used for FePt synthesis and cannot be consumed completely. Fabrication of Fe3O4 nanoparticles by consuming the excess iron precursor was an effective strategy to make full use of the iron precursor. In this paper, a facile post-treatment method was applied to consume the excess iron, which was oxidized to Fe3O4 after post-treatment at 150 and 200 °C, and a monodisperse binary FePt-Fe3O4 nanoparticle system was generated. The post-treatment method did not affect the crystal structure, grain size, or composition of the FePt nanoparticles. However, the content and grain size of the fcc-Fe3O4 nanoparticles can be increased simply by increasing the post-treatment temperature from 150 to 200 °C.

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Section: Resultssupporting

confidence: 68%

Section: Methodsmentioning

confidence: 99%

Post-treatment Method for the Synthesis of Monodisperse Binary FePt-Fe3O4 Nanoparticles

Liu

Niu

et al. 2017

Nanoscale Res Lett

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“…However, to date there is still no compelling results demonstrating similar performance from equivalent materials produced by electrodeposition. Here we focus on CoNiP that previously has shown a good promise for thin film technologies [9][20] [21] and we show that with the right conditions of deposition it can also be used for microscale applications.…”

Section: Electrodepositionmentioning

confidence: 99%

Advanced Processing of Micropatterned Elasto-Magnetic Membranes

et al. 2019

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We report on a fabrication of a highly structured elasto-magnetic membrane with microscopic unit cells using lithographic techniques and electrodeposition. The membrane comprises of micro-magnets of CoNiP and Co connected via an elastic PDMS network with an area spanning 12 mm 2. Ellipsoidal CoNiP and circular Co particles were produced by electrodeposition to achieve diameters of 30 μm (major) and 10 μm (minor), and 10 μm respectively, with a thickness in the range of 6-10 μm. The electrodeposition parameters have been optimized on deposition of CoNiP films to produce an in-plane coercivity for CoNiP elements of 435 Oe. The mechanical properties of the elasto-magnetic membrane were confirmed on application of an alternating magnetic field. The proposed methodology offers a new way for fabrication of novel microfluidic and MEMs devices.

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“…Recently, high-magnetic-field-assisted (HMF-assisted) heat treatment method attracts more and more attentions with the developing of superconducting technology. The HMF presents special effects on tailoring the morphology of films [12,13], regulating the growth rates of crystals [14][15][16][17], and operating the thermal dynamic and kinetic of solid-state phase transformation [18][19][20]. For the FePt alloys, the HMF annealing has been reported to induce strain in Fe 3 Pt alloy [21], promote disorderorder transformation of FePt films [22,23], and alignment of FePt spherical NPs [24,25].…”

Section: Introductionmentioning

confidence: 99%

Inducing formation of L10-phase in concave-cube FePt nanoparticles by annealing under high magnetic field

Wu¹,

Zhuang²,

Niu³

et al. 2020

Preprint

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Concave-cube FePt nanoparticles (NPs) with anisotropy of shape and element were annealed under high magnetic field (HMF). The high temperature sphered the FePt NPs, and Pt content and grain size of the NPs were decreased during annealing process. The HMF strength didn’t affect the shape, size and composition of the FePt NPs, but induced the formation of L 1 0 -phase in the annealed NPs. The content and ordering degree of L 1 0 -phase increased with enhancing the HMF strength, which leaded to the increasing of coercivity in the annealed FePt NPs. This work suggests that application of the HMF annealing is an effective strategy to tune the microstructure and property of anisotropic FePt NPs.

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Tuning microstructure and magnetic properties of electrodeposited CoNiP films by high magnetic field annealing

Cited by 19 publications

References 24 publications

Post-treatment Method for the Synthesis of Monodisperse Binary FePt-Fe3O4 Nanoparticles

Post-treatment Method for the Synthesis of Monodisperse Binary FePt-Fe3O4 Nanoparticles

Advanced Processing of Micropatterned Elasto-Magnetic Membranes

Inducing formation of L10-phase in concave-cube FePt nanoparticles by annealing under high magnetic field

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