JOM

, Volume 68, Issue 1, pp 336–340 | Cite as

Tuning the Magnetic Properties of Cobalt-Based Metallic Glass Nanocomposites

  • Medha Veligatla
  • Santanu Das
  • Won Ki Lee
  • Junyeon Hwang
  • Orathai Thumthan
  • Yaowu Hao
  • Sundeep Mukherjee
Article

Abstract

Temperature-induced variation in magnetic properties for cobalt-based metallic glass was investigated. The formation of metastable nanocrystalline phases prior to complete devitrification and their effect on magnetic properties for Co72B19.2Si4.8Cr4 metallic glass was studied. The nature, shape, and distribution of the intermediate nanocrystalline phases were characterized using transmission electron microscopy and x-ray diffraction. A drastic change in magnetic properties was found in going from a fully amorphous state to different stages of nanocrystallization. The coercivity changes from amorphous soft magnetic state (Hc ~ 0.12 Oe) to a nanocrystalline-dispersed hard magnetic state (Hc ~ 187 Oe), with no significant change in saturation magnetization. This suggests potential use in futuristic magnetic switches, fluxgate sensors, and electromagnetic shielding devices.

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Copyright information

© The Minerals, Metals & Materials Society 2015

Authors and Affiliations

  • Medha Veligatla
    • 1
  • Santanu Das
    • 1
  • Won Ki Lee
    • 2
  • Junyeon Hwang
    • 2
  • Orathai Thumthan
    • 3
  • Yaowu Hao
    • 3
  • Sundeep Mukherjee
    • 1
  1. 1.Department of Materials Science and EngineeringUniversity of North TexasDentonUSA
  2. 2.Korea Institute of Science and TechnologyJeollabuk-doSouth Korea
  3. 3.Department of Materials Science and EngineeringUniversity of Texas at ArlingtonArlingtonUSA

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