Synthesis of Hexagonal Close-Packed Cobalt Nanoparticles From Thermolysis of Cobalt Carbonyl

被引:0
作者
Takahashi, Kyohei [1 ]
Ito, Hiroshi [1 ]
Kanada, Isao [1 ]
Matsumoto, Hiroyuki [1 ]
机构
[1] TDK Corp, Mat Res Ctr, Technol & IP HQ, Narita 2868588, Japan
关键词
Soft magnetic materials; synthesis; nanoparticles; hexagonal close-packed cobalt; MAGNETIC-ANISOTROPY; PARTICLE-SIZE;
D O I
10.1109/LMAG.2023.3316608
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Magnetic materials with low magnetic loss are required to realize both a high-frequency support and a miniaturization of radio frequency components. Hexagonal close-packed cobalt (hcp-Co) nanoparticles are considered suitable for high frequencies due to their nanoparticle morphology and high magnetocrystalline anisotropy. However, the face-centered cubic (fcc) or the epsilon phase with low magnetocrystalline anisotropy is fabricated in the synthetization of Co nanoparticles with a size of less than a few hundred nanometers. In this letter, we investigate the synthesis of Co nanoparticles by the thermolysis of dicobalt octacarbonyl at various temperatures for obtaining Co particles with a single hcp phase. Although Co nanoparticles synthesized at 453 K exhibited a mixture of hcp and fcc phases with an hcp phase ratio of 25%, Co nanoparticles almost achieved the hcp phase ratio of 100% by decreasing the thermolysis temperature to 333 K or lower. Furthermore, we evaluated the permeability spectrum of the composite with Co particles of 10 vol% dispersed in polystyrene. Although the real part of the permeability in the composite containing Co nanoparticles with the mixed phase of fcc and hcp monotonously decreased with frequency, the composite contained Co nanoparticles with a single phase with a suitable constant value up to 3 GHz for high-frequency applications.
引用
收藏
页数:4
相关论文
共 17 条
  • [1] Controlled crystalline structure and surface stability of cobalt nanocrystals
    Bao, YP
    Beerman, M
    Pakhomov, AB
    Krishnan, KM
    [J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (15) : 7220 - 7222
  • [2] The Critical Role of Surfactants in the Growth of Cobalt Nanoparticles
    Bao, Yuping
    An, Wei
    Turner, C. Heath
    Krishnan, Kannan M.
    [J]. LANGMUIR, 2010, 26 (01) : 478 - 483
  • [3] Ferromagnetic resonance in ε-Co magnetic composites
    Chalapat, Khattiya
    Timonen, Jaakko V. I.
    Huuppola, Maija
    Koponen, Lari
    Johans, Christoffer
    Ras, Robin H. A.
    Ikkala, Olli
    Oksanen, Markku A.
    Seppala, Eira
    Paraoanu, G. S.
    [J]. NANOTECHNOLOGY, 2014, 25 (48)
  • [4] Synthesis of spherical cobalt oxide nanoparticles by a polyol method
    Izu, Noriya
    Matsubara, Ichiro
    Uchida, Toshio
    Itoh, Toshio
    Shin, Woosuck
    [J]. JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, 2017, 125 (09) : 701 - 704
  • [5] Control of particle size by pressure adjustment in cobalt nanoparticle synthesis
    Johans, Christoffer
    Pohjakallioa, Maija
    Ijaes, Mari
    Ge, Yanling
    Oritturi, Kyoesti
    [J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2008, 330 (01) : 14 - 20
  • [6] Size control of cobalt nanoparticles by adjusting the linear carboxylic acid ligand chain length
    Johnston-Peck, Aaron C. C.
    Tracy, Joseph B. B.
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2022, 550
  • [7] Size effect on the crystal phase of cobalt fine particles
    Kitakami, O
    Sato, H
    Shimada, Y
    Sato, F
    Tanaka, M
    [J]. PHYSICAL REVIEW B, 1997, 56 (21): : 13849 - 13854
  • [8] GHz magnetic film inductors
    Korenivski, V
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2000, 215 : 800 - 806
  • [9] Hcp cobalt nanocrystals with high magnetic anisotropy prepared by easy one-pot synthesis
    Meziane, L.
    Salzemann, C.
    Aubert, C.
    Gerard, H.
    Petit, C.
    Petit, M.
    [J]. NANOSCALE, 2016, 8 (44) : 18640 - 18645
  • [10] Colloidal nanocrystal shape and size control: The case of cobalt
    Puntes, VF
    Krishnan, KM
    Alivisatos, AP
    [J]. SCIENCE, 2001, 291 (5511) : 2115 - 2117