Crystal structure of Zr2Co11 hard magnetic compound

Иванова, Г. В.; Щеголева, Н. Н.; Gabay, A. M.

doi:10.1016/j.jallcom.2006.05.122

Cited by 59 publications

(38 citation statements)

References 10 publications

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“…[5,6] Figure 2(e) was indexed according to the lattice parameters reported by Demczyk and Cheng. [6] Figure 2 Note: HT is high temperature, LT is low temperature.…”

Section: Resultsmentioning

confidence: 99%

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Magnetism of rapidly quenched rhombohedral Zr₂Co₁₁-based nanocomposites

Zhang¹,

Li²,

Valloppilly³

et al. 2013

J. Phys. D: Appl. Phys.

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The effect of quench rate and Zr content on nanostructure and magnetic properties of melt-spun ZrxCo100−x (x = 16-21) is investigated. High quench rate favors the formation of rhombohedral Zr2Co11, which is the hard phase. The coercivity increases with an increase in quench rate. Zr addition in limited amounts decreases the grain size of magnetic phases, which may promote the effective exchange coupling of soft magnetic phases. Therefore, coercivity and maximum energy product of Zr2Co11-based materials are significantly enhanced. The best magnetic properties, iHc = 3.0 kOe and (BH)max = 4.6 MG Oe, which are the highest reported values among Co-Zr binary alloys, are achieved for x = 18. The temperature coefficients of coercivity and remanence between 100 and 380 K are −0.05% K −1 , comparable to those of alnico magnet.

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“…[5,6] Figure 2(e) was indexed according to the lattice parameters reported by Demczyk and Cheng. [6] Figure 2 Note: HT is high temperature, LT is low temperature.…”

Section: Resultsmentioning

confidence: 99%

“…[3] Depending on the preparation process, the crystal structure of Zr2Co11 may be pseudohexagonal, rhombohedral, or orthorhombic. [4][5][6] Until now, the structure that leads to hard magnetism is under dispute. Recently, most work was focused on optimizing nanostructure and improving the magnetic properties of Zr2Co11-based alloys.…”

Section: Introductionmentioning

confidence: 99%

Magnetism of rapidly quenched rhombohedral Zr₂Co₁₁-based nanocomposites

Zhang¹,

Li²,

Valloppilly³

et al. 2013

J. Phys. D: Appl. Phys.

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show abstract

“…[1][2][3] Depending on the preparation process, the crystal structure of Zr 2 Co 11 may be rhombohedral or orthorhombic. [4][5][6] Among these phases, rhombohedral Zr 2 Co 11 has been demonstrated to be the hard magnetic phase, 7 and a high quenching rate favors the formation of the hard magnetic phase. 8 Recently, an impressive energy product comparable to that of sintered SmCo 5 was obtained for the easy-axis aligned Zr 2 Co 11 -based nanocomposites produced by a single step cluster-deposition method.…”

Section: Introductionmentioning

confidence: 99%

Phase composition and nanostructure of Zr2Co11-based alloys

Jin

Zhang

Skomski

et al. 2014

Journal of Applied Physics

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The effect of Mo addition on phase composition and nanostructure of nanocrystalline Zr16Co84−xMox (x = 0–2.0) melt spun at 55 m/s has been investigated. All the ribbons consist mainly of a hard magnetic Zr2Co11 phase with rhombohedral crystal structure but also contain minor amounts of soft-magnetic phases. The increase in cell volume on alloying suggests that Mo mainly enters the rhombohedral Zr2Co11 structure and occupies the Co site. Mo addition promotes the formation of the hard magnetic phase and increases its volume fraction. The mean grain size of the hard magnetic phase remains almost unchanged with the increase of Mo content. But the average grain size of the soft magnetic phase decreases from about 200 nm to 50 nm. This promotes the exchange coupling of the hard and soft magnetic phases and thus leads to a significant increase in coercivity and isotropic energy product, from 0.6 kOe and 0.5 MGOe for x = 0 to 2.9 kOe and 4.2 MGOe for x = 1.5.

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“…[1,2] Depending on the preparation process, the crystal structure of Zr2Co11 may be pseudohexagonal, rhombohedral, or orthorhombic. [3][4][5] Rhombohedral Zr2Co11 was found to be the hard magnetic phase. Although the basic structure is denoted as Zr2Co11, a range of composition exists and it is often found that the stoichiometry corresponds toZrCo5.1.…”

Section: Introductionmentioning

confidence: 96%

Effect of annealing on nanostructure and magnetic properties of Zr2Co11 material

Zhang

Valloppilly

et al. 2014

Materials Science and Engineering: B

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Single-phase Zr2Co11 nanomagnetic materials with high coercivity have been fabricated by melt spinning with subsequent annealing under Ar, N2, and vacuum. Annealing coarsens the grains and decreases the density of defects, leading to intergrain decoupling action and the enhancement of the magnetocrystalline anisotropy field of the hard magnetic phase. Therefore, coercivity increases 44.7% from 6.7 kOe for the as-spun to 9.7 kOe for the annealed, which is the highest among Zr-Co alloys so far. The results show that the magnetic-hardening mechanism is primarily dominated by domain-wall pinning. In addition, annealing clearly increases the saturation magnetization. The above results indicate that Zr2Co11 has potential for fabricating rare-earth-free permanent-magnet nanocomposites.

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Crystal structure of Zr2Co11 hard magnetic compound

Cited by 59 publications

References 10 publications

Magnetism of rapidly quenched rhombohedral Zr₂Co₁₁-based nanocomposites

Magnetism of rapidly quenched rhombohedral Zr₂Co₁₁-based nanocomposites

Phase composition and nanostructure of Zr2Co11-based alloys

Effect of annealing on nanostructure and magnetic properties of Zr2Co11 material

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Crystal structure of Zr2Co11 hard magnetic compound

Cited by 59 publications

References 10 publications

Magnetism of rapidly quenched rhombohedral Zr2Co11-based nanocomposites

Magnetism of rapidly quenched rhombohedral Zr2Co11-based nanocomposites

Phase composition and nanostructure of Zr2Co11-based alloys

Effect of annealing on nanostructure and magnetic properties of Zr2Co11 material

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Product

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Magnetism of rapidly quenched rhombohedral Zr₂Co₁₁-based nanocomposites

Magnetism of rapidly quenched rhombohedral Zr₂Co₁₁-based nanocomposites