Effect of milling time on the morphology and magnetic properties of SmCo 5 nanoflakes fabricated by surfactant-assisted high-energy ball milling

Yu, Nengjun; Pan, Minxiang; Zhang, Pengyue; Ge, Hongliang; Wu, Qiong

doi:10.1016/j.jmmm.2014.09.079

Cited by 17 publications

(7 citation statements)

References 16 publications

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“…Apart from that, it may also be associated with some other microstructural non-uniformities. Such behavior was already evidenced in other ball-milled intermetallics and is mostly related to the exchange spring mechanism [12,30,[61][62][63]. In our case, we may observe such a deformation and characteristic kink especially at 2 K for t = 6 and 8 h, whereas at room temperature, such effect is not so clearly evident.…”

Section: Magnetic Propertiessupporting

confidence: 76%

“…As demonstrated for other materials, the finer nanoparticles, nanoflakes, favor arrangements along an easy axis of magnetization, which is reflected as an evident increase in saturation magnetization [1,10,14,18,20,21,27,28,39]. and is mostly related to the exchange spring mechanism [12,30,[61][62][63]. In our case, we may observe such a deformation and characteristic kink especially at 2 K for t = 6 and 8 h, whereas at room temperature, such effect is not so clearly evident.…”

Section: Magnetic Propertiessupporting

confidence: 67%

“…Most of all, high-energy ball milling (HEBM) allows for controlling the micro/nanostructure of synthesized materials which is often directly related to the enhancement of coercivity ( H C ) or the maximum energy product (BH) max . As it has been shown, such relation is fulfilled in many nanostructured R-T-based intermetallics, e.g., Sm–Co [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ], Pr–Co [ 24 , 25 , 26 , 27 , 28 ] and Nd–Fe–B nanopowders [ 29 , 30 , 31 ] and some others having a 1:3 rhombohedral crystal structure [ 24 , 25 , 26 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 ]. Nonetheless, as it has been evidenced that SmCo 5 -based nanomagnets are recognized as materials with the highest coercivity and Curie temperature [ 1 , 2 ].…”

Section: Introductionmentioning

confidence: 91%

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Correlation between Microstructure and Magnetism in Ball-Milled SmCo5/α-Fe (5%wt. α-Fe) Nanocomposite Magnets

et al. 2021

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Magnetic nanocomposites SmCo5/α-Fe were synthesized mechanically by high-energy ball milling (HEBM) from SmCo5 and 5%wt. of α-Fe powders. The X-ray diffraction analysis reveals the hexagonal 1:5 phase as the main one accompanied by the cubic α-Fe phase and 2:17 rhombohedral as the secondary phase. The content of each detected phase is modified throughout the synthesis duration. A significant decrease in crystallite size with a simultaneous increase in lattice straining is observed. A simultaneous gradual reduction in particle size is noted from the microstructural analysis. Magnetic properties reveal non-linear modification of magnetic parameters associated with the strength of the exchange coupling induced by various duration times of mechanical synthesis. The highest value of the maximum energy product (BH)max at room temperature is estimated for samples milled for 1 and 6 h. The intermediate mixed-valence state of Sm ions is confirmed by electronic structure analysis. An increase in the Co magnetic moment versus the milling time is evidenced based on the performed fitting of the Co3s core level lines.

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Section: Magnetic Propertiessupporting

confidence: 76%

Section: Magnetic Propertiessupporting

confidence: 67%

Section: Introductionmentioning

confidence: 91%

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Correlation between Microstructure and Magnetism in Ball-Milled SmCo5/α-Fe (5%wt. α-Fe) Nanocomposite Magnets

et al. 2021

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“…[1][2][3][4] A variety of rare earth (RE)-transition metal (TM) nanoparticles and nanoflakes with high aspect-ratio were prepared by a surfactant-assisted ball milling (SABM) method. [5][6][7] Up to now, remarkable progress has been reported in preparation of Nd 2 Fe 14 B based nanoparticles and nanoflakes with low coercivity not more than 2 kOe.…”

Section: Introductionmentioning

confidence: 99%

“…Strong-textured (Nd,Tb) 2 Fe 14 B nanoflakes were successfully produced, and the effect of ball milling time on the structure and magnetic properties of the flakes were systematically investigated. (Nd,Tb) 2 …”

Section: Introductionmentioning

confidence: 99%

Crystal structure and magnetic properties of (Nd,Tb)2Fe14B nanoflakes prepared by surfactant-assisted ball milling

Yue

et al. 2017

AIP Advances

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The microstructure, crystal structure, and magnetic properties were studied for (Nd,Tb)2Fe14B nanoflakes prepared by surfactant-assisted high-energy ball milling (HEBM). Effects of ball-milling time on the c-axis crystallographic alignment, morphology, and magnetic properties of (Nd,Tb)2Fe14B nanoflakes were systematically investigated. X-ray diffraction (XRD) results indicate that the average crystal grain size of the nanoflakes decreases from 60 nm of 1 hour milling to 33 nm of 7 hours milling. The nanoflakes milled for 3 hours bear an average thickness of 100 nm and an average diameter of 2 μm leading to a high aspect ratio of 20. In addition, the intensity ratio of I(006)/I(105) indicates that the degree of c-axis crystal texture increases first, peaks for 3 hours, then drops with increasing the milling time. Meanwhile, the coercivity (Hc) of the nanoflakes drops monotonically. The remanence (Mr) of nanoflakes milled for 3 hours in the easy axis direction is 11 kG, while the Mr in the hard axis direction is 1.8 kG, indicating a strong magnetic anisotropy. The optimal magnetic properties of Mr of 11 kG, and Hc of 7 kOe, (BH)max of 24.7 MGOe have been achieved.

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Preparation of micro-size flake silver powder by planetary ball mill

Liu

et al. 2015

J Mater Sci: Mater Electron

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Effect of milling time on the morphology and magnetic properties of SmCo 5 nanoflakes fabricated by surfactant-assisted high-energy ball milling

Cited by 17 publications

References 16 publications

Correlation between Microstructure and Magnetism in Ball-Milled SmCo5/α-Fe (5%wt. α-Fe) Nanocomposite Magnets

Correlation between Microstructure and Magnetism in Ball-Milled SmCo5/α-Fe (5%wt. α-Fe) Nanocomposite Magnets

Crystal structure and magnetic properties of (Nd,Tb)2Fe14B nanoflakes prepared by surfactant-assisted ball milling

Preparation of micro-size flake silver powder by planetary ball mill

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