Magnetic texture and coercivity of anisotropic nanocrystalline SmCo6.1Si0.9 magnets

An, Shizhong; Zhang, Tianli; Jiang, Chengbao

doi:10.1063/1.4860658

Cited by 6 publications

(3 citation statements)

References 21 publications

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“…The bulk density as it has an influence on remanent magnetization might have an effect on coercivity as well. 11 Finely distributed pores in bulks containing smaller flakes may be more effective in pinning domain walls. It is noted that the shape of the demagnetization curve gets poorer as the flake thickness is reduced to 200 nm.…”

Section: Resultsmentioning

confidence: 99%

“…Anisotropic nanocrystalline SmCo 7 bulk magnets created from nanoflake powders via spark plasma sintering technique were investigated by several researchers. 10,11 However, it is less reported on correlation between nanoflake morphology and final properties of the SmCo 5 bulk magnets. In this study, we prepared SmCo 5 nanoflakes by surfactant-assisted high energy ball milling and fabricated SmCo 5 bulks from these powders by induction hot-pressing.…”

Section: Introductionmentioning

confidence: 99%

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Effect of flake thickness on coercivity of nanocrystalline SmCo5 bulk prepared from anisotropic nanoflake powder

et al. 2016

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In this study, nanocrystalline SmCo5 bulk magnets were prepared by hot-pressing of nanoflake powders fabricated via surfactant-assisted high energy ball milling. Effect of the flake thickness on magnetic coercivity of the SmCo5 bulk was investigated. Anisotropic SmCo5 nanoflakes with thickness between 100 and 1000 nm were prepared by varying the milling parameter of ball-to-powder weight ratio. XRD analysis revealed that as-milled flake powders possessed nanocrystalline grains with no observable oxide peaks. The coercivity of the flake powders varied between 19.9 and 21.3 kOe for 1000 nm to 100 nm thick flakes, which indicated that the flake thickness in this range had no obvious effect on the coercivity of the powders. However, the coercivity of the bulks showed a strong dependence on the flake thickness. The bulk coercivity value of 10.97 kOe corresponding to the flake thickness of 100 nm, was 80% higher compared to the bulk prepared with the flakes of 1000 nm. XRD results on compacted samples did not show any grain growth, however, Sm2O3 and free Co were detected in SmCo5 bulks and their content increased with reduced flake thickness. Interestingly enough the bulk coercivity was not deteriorated with the presence of Sm oxide and Co.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of flake thickness on coercivity of nanocrystalline SmCo5 bulk prepared from anisotropic nanoflake powder

et al. 2016

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“…The grain orientation and phase analyses were conducted using an XRD system. The relative intensity ratio between (006) and (114) peaks (I 006 /I 114 ) was determined for the samples sintered at the initial sintering parameters and at the optimized sintering parameters taken from Taguchi result as shown in Figure 7 a–c, where the increase in the relative intensity means that the grains lead to be reoriented along the c-axis (highly textured) [ 49 ]. Accordingly, the orientation of the grain can be obtained qualitatively by the Texture Coefficient (TC) [ 50 ].…”

Section: Resultsmentioning

confidence: 99%

Process Optimization of In Situ Magnetic-Anisotropy Spark Plasma Sintering of M-Type-Based Barium Hexaferrite BaFe12O19

et al. 2021

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This paper introduces a new spark plasma sintering technique that is able to order crystalline anisotropy by in-series/in situ DC electric coupled magnetic field. The process control parameters have been investigated on the production of anisotropic BaFe12O19 magnets based on resulted remanence (Mr). Sintering holding time (H.T.), cooling rate (C.R.), pressure (P), and sintering temperature (S.T.) are optimized by Taguchi with L9 orthogonal array (OA). The remanent magnetization of nanocrystalline BaFe12O19 in parallel (Mrǁ) and perpendicular (MrꞱ) to the applied magnetic field was regarded as a measure of performance. The Taguchi study calculated optimum process parameters, which significantly improved the sintering process based on the confirmation tests of BaFe12O19 anisotropy. The magnetic properties in terms of Mrǁ and MrꞱ were greatly affected by sintering temperature and pressure according to ANOVA results. In addition, regression models were developed for predicting the Mrǁ as well as MrꞱ respectively.

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Enhanced magnetic properties of SmCo/FeCo nanocomposite magnets by doping eutectic Sm-Ni alloy

et al. 2023

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Magnetic texture and coercivity of anisotropic nanocrystalline SmCo6.1Si0.9 magnets

Abstract: Magnetic properties and structure of bulk nanocrystalline Sm ( CoCuFeZr ) 7.6 sintered magnet

Cited by 6 publications

References 21 publications

Effect of flake thickness on coercivity of nanocrystalline SmCo5 bulk prepared from anisotropic nanoflake powder

Effect of flake thickness on coercivity of nanocrystalline SmCo5 bulk prepared from anisotropic nanoflake powder

Process Optimization of In Situ Magnetic-Anisotropy Spark Plasma Sintering of M-Type-Based Barium Hexaferrite BaFe12O19

Enhanced magnetic properties of SmCo/FeCo nanocomposite magnets by doping eutectic Sm-Ni alloy

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