Fabrication and magnetic properties of Sm2Co17 and Sm2Co17/Fe7Co3 magnetic nanowires via AAO templates

Yang, Wei; Cui, Chunxiang; Liu, Qiaozhi; Cao, Bin; Zhang, Yajin

doi:10.1016/j.jcrysgro.2014.04.009

Cited by 20 publications

(5 citation statements)

References 10 publications

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“…Table 3 compares these results with other reported data (Saravanan et al, 2011a , b ; Zhang et al, 2011 ; Zheng et al, 2012 ; Yang et al, 2014 ; Cui et al, 2015 ). The higher M s can also be explained due to the well-crystallized Sm 2 Co 17 grain and low impurity contents less than 0.1 wt.% including Ca as a byproduct, and minimum oxide phase on the surface of Sm-Co.…”

Section: Resultssupporting

confidence: 69%

Synthesis of Samarium-Cobalt Sub-micron Fibers and Their Excellent Hard Magnetic Properties

et al. 2018

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High-throughput synthesis of Samarium-Cobalt sub-micron fibers with controlled composition and dimension was demonstrated by combining electrospinning and reduction-diffusion processes. The composition of fibers was readily varied (8 < Sm < 20 at.%) by adjusting precursor composition whereas the diameter of fibers was precisely controlled by varying electrospinning parameters (e.g., applied voltage, solution feed rate, temperature, and humidity) to reach single-domain size. X-ray diffraction patterns confirmed that single phase Sm2Co17 fibers were synthesized when the metal precursor ratio (Sm3+/(Sm3++Co2+)) was precisely controlled at 10.6%, whereas mixed phases (i.e., Co-Sm2Co17 or Sm2Co17-Sm2Co7) were observed when the ratio is deviated from the stoichiometric. Magnetic saturation (Ms) of the synthesized fibers monotonically decreased with an increased in Sm content. In contrast, coercivity (Hci) monotonically increased with an increase in Sm content.

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Section: Resultssupporting

confidence: 69%

Synthesis of Samarium-Cobalt Sub-micron Fibers and Their Excellent Hard Magnetic Properties

et al. 2018

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“…The x-ray diffraction patterns of Tb x Nd 10-x Fe 80 Co 4 B 6 /Fe 7 Co 3 (x=0.1, 0.2, and 0.3) ribbons annealed at 700°C for 5 min are shown in figure 4. According to previous reports [19,20], the peaks observed at 2θ values of 44.7°, 65.1°, and 82.4°correspond to the (110), (200), and (211) reflections of Fe 7 Co 3 respectively, with the remaining peaks ascribable to hard magnetic 2:14:1 phases. We also found that the relative intensities of the diffraction peaks that correspond to the Fe 7 Co 3 phase decreased distinctly with the introduction of Tb, which indicates that Tb doping inhibits the growth of Fe 7 Co 3 grains and increases the volume fraction of the hard magnetic phase.…”

Section: Methodssupporting

confidence: 63%

The effect of Tb doping on the magnetic properties and microstructure of a TbNdFeCoB/Fe₇Co₃ nanocomposite permanent magnet

Ding

Cui

Yang

et al. 2020

Mater. Res. Express

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Melt-spun NdFeB-type nanocomposite magnetic materials are important in a number of applications, including electromagnetic sensors, magnetic resonance imaging, and voice coil motors. Herein we investigated the magnetic properties and microstructures of melt-spun Tb x Nd 10−x Fe 80 Co 4 B 6 /Fe 7 Co 3 (x=0.1, 0.2, and 0.3) ribbons by means of x-ray diffractometry, scanning electron microscopy, and magnetization experiments. Tb doping resulted in the formation of a 2:14:1 phase with a higher anisotropy field, which suppressed the separation of Fe 7 Co 3 branch crystals and improved the magnetic properties of the material. Optimum magnetic properties that include a remanence (J r ) of 0.62 T, a coercivity (H ci ) of 612.0 kA m −1 , and a maximum magnetic energy product ((BH) max ) of 94.9 kJ m −3 were obtained for the annealed Tb 0.3 Nd 9.7 Fe 80 Co 4 B 6 /Fe 7 Co 3 ribbon. Furthermore, the effective anisotropy constant, K , eff and the saturation magnetization, Ms, in the nanocomposite were determined by the LATS (law of approach to saturation) method. In this study, the values of K eff and Ms were found to lie between those of hard and soft magnetic phases, consistent with the exchangecoupling concept.

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“…diameter modulation) [11,12]; or compositional modulation along the nanowire (i.e. multilayer or multisegmented nanowires) [13,14].…”

Section: Introductionmentioning

confidence: 99%

Magnetic interactions in compositionally modulated nanowire arrays

et al. 2016

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Series of high hexagonally ordered compositionally modulated nanowire arrays, with different Cu layer and FeCoCu segment thicknesses and a constant diameter of 35 nm, were fabricated by electroplating from a single electrolytic bath into anodic aluminum oxide membranes. The objective of the study was to determine the influence of ferromagnetic (FM) segment and non-ferromagnetic (NFM) layer thickness on the magnetic properties, particularly coercivity and magnetic interactions. First-order reversal curve (FORC) measurements and simulations were performed to quantify the effect of the inter-/intra-nanowire magnetostatic interactions on the coercivity and interaction field distributions. The FORC coercivity increases for a thick NFM layer and long FM segments due to decoupling of the the FM segments and the increased shape anisotropy, respectively. On the other hand, the interaction field presents a parallel strong reduction for a thick NFM layer and thin FM segments, which is ascribed to a similar NFM/FM thickness ratio and degree of FM segment decoupling along the nanowire.

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Fabrication and magnetic properties of Sm2Co17 and Sm2Co17/Fe7Co3 magnetic nanowires via AAO templates

Cited by 20 publications

References 10 publications

Synthesis of Samarium-Cobalt Sub-micron Fibers and Their Excellent Hard Magnetic Properties

Synthesis of Samarium-Cobalt Sub-micron Fibers and Their Excellent Hard Magnetic Properties

The effect of Tb doping on the magnetic properties and microstructure of a TbNdFeCoB/Fe₇Co₃ nanocomposite permanent magnet

Magnetic interactions in compositionally modulated nanowire arrays

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Fabrication and magnetic properties of Sm2Co17 and Sm2Co17/Fe7Co3 magnetic nanowires via AAO templates

Cited by 20 publications

References 10 publications

Synthesis of Samarium-Cobalt Sub-micron Fibers and Their Excellent Hard Magnetic Properties

Synthesis of Samarium-Cobalt Sub-micron Fibers and Their Excellent Hard Magnetic Properties

The effect of Tb doping on the magnetic properties and microstructure of a TbNdFeCoB/Fe7Co3 nanocomposite permanent magnet

Magnetic interactions in compositionally modulated nanowire arrays

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Product

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The effect of Tb doping on the magnetic properties and microstructure of a TbNdFeCoB/Fe₇Co₃ nanocomposite permanent magnet