Investigations on the Magnetic Properties of High-Coercivity (Nd(1-x)Fe(x))90Al10 Bulk Amorphous Alloys

Abstract

Bulk rods with diameters up to 3 mm prepared by suction casting and respectively mould casting and melt-spun amorphous ribbons with thicknesses in the range 25 - 150 micrometers with compositions Nd(90-x)Fe(x)Al10 (x = 35; 40; 45; 50) were investigated by XRD, DSC and magnetic measurements in the temperature range 5 - 600 K. The microstructure and magnetic properties are strongly dependent on the cooling rate, preparation process and Fe content. The large values of the coercive field, which amount to 320 kA/m in the as-cast state as well as the increase with decrease of the temperature and cooling rate result from the formation of very small metastable or nonequilibrium magnetic clusters.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2001
Accession Number
ADP012290

Entities

People

  • A. Inoue
  • A. Takeuchi
  • H. Chiriac
  • Nicoleta Lupu

Organizations

  • Tohoku University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Coercivity
  • Fiber Spinning
  • Glass
  • Glass Transition Temperature
  • Laboratory Magnetometers
  • Low Temperature
  • Magnetic Domains
  • Magnetic Fields
  • Magnetic Materials
  • Magnetic Properties
  • Magnetization
  • Magnetometers
  • Materials
  • Materials Processing
  • Transition Temperature

Fields of Study

  • Materials science

Readers

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  • Superconducting Magnet Technology