Structural, morphological, and magnetic study of nanocrystalline cobalt-nickel-copper particles

Wen Wei Zhang; Qing Qi Cao; Jin Li Xie; Xiao Ming Ren; Chang Sheng Lu; Yang Zhou; Yuan Gen Yao; Qing Jin Meng

doi:10.1016/S0021-9797(02)00056-5

Structural, morphological, and magnetic study of nanocrystalline cobalt-nickel-copper particles

Wen Wei Zhang, Qing Qi Cao, Jin Li Xie, Xiao Ming Ren, Chang Sheng Lu, Yang Zhou, Yuan Gen Yao, Qing Jin Meng

Research output: Contribution to journal › Article › peer-review

45 Scopus citations

Abstract

Nanocrystalline Co_xNi_yCu_100-x-y particles were synthesized by the reduction of metal acetates in a mixture of polyol and Tween 80. Inductively coupled plasma (ICP) analysis revealed that the actual wt% of Co, Ni, and Cu in these nanoparticles was nearly the same as in the starting solutions. The structures of the particles were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED) spectroscopy, and vibrating sample magnetometry (VSM). The results of XRD and VSM confirmed that there was no metastable alloying in the particles. The particles were composites, consisting of nanoscale crystallites of face-centered cubic (fcc) Cu, face-centered cubic (fcc) Ni, and face-centered cubic (fcc) Co. During preparation the nucleation of Cu occurred first; then small Cu nuclei acted as cores for the precipitation of Co and Ni. The particles showed an increase in saturation magnetization (M_s) as the concentration of Co or Ni in the particles was increased. The changes of both M_s and coercivity of the particles with increasing annealing temperatures were studied. The coercivity of the particles was very high; it could reach as high as 489 Oe for Co_34.3Ni_31.2Cu_34.5.

Original language	English
Pages (from-to)	237-243
Number of pages	7
Journal	Journal of Colloid and Interface Science
Volume	257
Issue number	2
DOIs	https://doi.org/10.1016/S0021-9797(02)00056-5
State	Published - 15 Jan 2003
Externally published	Yes

Keywords

Co-Ni-Cu nanocrystalline particles
Coercivity
Saturation magnetization

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10.1016/S0021-9797(02)00056-5

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title = "Structural, morphological, and magnetic study of nanocrystalline cobalt-nickel-copper particles",

abstract = "Nanocrystalline CoxNiyCu100-x-y particles were synthesized by the reduction of metal acetates in a mixture of polyol and Tween 80. Inductively coupled plasma (ICP) analysis revealed that the actual wt% of Co, Ni, and Cu in these nanoparticles was nearly the same as in the starting solutions. The structures of the particles were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED) spectroscopy, and vibrating sample magnetometry (VSM). The results of XRD and VSM confirmed that there was no metastable alloying in the particles. The particles were composites, consisting of nanoscale crystallites of face-centered cubic (fcc) Cu, face-centered cubic (fcc) Ni, and face-centered cubic (fcc) Co. During preparation the nucleation of Cu occurred first; then small Cu nuclei acted as cores for the precipitation of Co and Ni. The particles showed an increase in saturation magnetization (Ms) as the concentration of Co or Ni in the particles was increased. The changes of both Ms and coercivity of the particles with increasing annealing temperatures were studied. The coercivity of the particles was very high; it could reach as high as 489 Oe for Co34.3Ni31.2Cu34.5.",

keywords = "Co-Ni-Cu nanocrystalline particles, Coercivity, Saturation magnetization",

author = "Zhang, {Wen Wei} and Cao, {Qing Qi} and Xie, {Jin Li} and Ren, {Xiao Ming} and Lu, {Chang Sheng} and Yang Zhou and Yao, {Yuan Gen} and Meng, {Qing Jin}",

year = "2003",

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doi = "10.1016/S0021-9797(02)00056-5",

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TY - JOUR

T1 - Structural, morphological, and magnetic study of nanocrystalline cobalt-nickel-copper particles

AU - Zhang, Wen Wei

AU - Cao, Qing Qi

AU - Xie, Jin Li

AU - Ren, Xiao Ming

AU - Lu, Chang Sheng

AU - Zhou, Yang

AU - Yao, Yuan Gen

AU - Meng, Qing Jin

PY - 2003/1/15

Y1 - 2003/1/15

N2 - Nanocrystalline CoxNiyCu100-x-y particles were synthesized by the reduction of metal acetates in a mixture of polyol and Tween 80. Inductively coupled plasma (ICP) analysis revealed that the actual wt% of Co, Ni, and Cu in these nanoparticles was nearly the same as in the starting solutions. The structures of the particles were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED) spectroscopy, and vibrating sample magnetometry (VSM). The results of XRD and VSM confirmed that there was no metastable alloying in the particles. The particles were composites, consisting of nanoscale crystallites of face-centered cubic (fcc) Cu, face-centered cubic (fcc) Ni, and face-centered cubic (fcc) Co. During preparation the nucleation of Cu occurred first; then small Cu nuclei acted as cores for the precipitation of Co and Ni. The particles showed an increase in saturation magnetization (Ms) as the concentration of Co or Ni in the particles was increased. The changes of both Ms and coercivity of the particles with increasing annealing temperatures were studied. The coercivity of the particles was very high; it could reach as high as 489 Oe for Co34.3Ni31.2Cu34.5.

AB - Nanocrystalline CoxNiyCu100-x-y particles were synthesized by the reduction of metal acetates in a mixture of polyol and Tween 80. Inductively coupled plasma (ICP) analysis revealed that the actual wt% of Co, Ni, and Cu in these nanoparticles was nearly the same as in the starting solutions. The structures of the particles were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED) spectroscopy, and vibrating sample magnetometry (VSM). The results of XRD and VSM confirmed that there was no metastable alloying in the particles. The particles were composites, consisting of nanoscale crystallites of face-centered cubic (fcc) Cu, face-centered cubic (fcc) Ni, and face-centered cubic (fcc) Co. During preparation the nucleation of Cu occurred first; then small Cu nuclei acted as cores for the precipitation of Co and Ni. The particles showed an increase in saturation magnetization (Ms) as the concentration of Co or Ni in the particles was increased. The changes of both Ms and coercivity of the particles with increasing annealing temperatures were studied. The coercivity of the particles was very high; it could reach as high as 489 Oe for Co34.3Ni31.2Cu34.5.

KW - Co-Ni-Cu nanocrystalline particles

KW - Coercivity

KW - Saturation magnetization

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DO - 10.1016/S0021-9797(02)00056-5

M3 - 文章

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JO - Journal of Colloid and Interface Science

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IS - 2

ER -

Structural, morphological, and magnetic study of nanocrystalline cobalt-nickel-copper particles

Abstract

Keywords

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