Ultra-Low-Temperature Magnetic Materials for Cryogenic Regenerator Matrices

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Ultra-Low-Temperature Magnetic Materials for Cryogenic Regenerator Matrices

Magnetic regenerator material shows large specific heat peak at ultra-low temperature (in the vicinity of 4K), accompanying magnetic phase transition. By applying our magnetic regenerator material to GM (Gifford-McMahon) refrigerators, it became possible to generate high refrigeration capability at liquid helium temperature (4.2K). If a 4K GM refrigerator is used for superconducting MRI (Magnetic Resonance Imaging), it may be possible to realize “Zero Boil-Off" that eliminates the evaporation of liquid helium.

Ultra-Low-Temperature Magnetic Materials for Cryogenic Regenerator Matrices
Specific heat characteristic graph of various magnetic refrigerant

Features

  • Environmentally friendly alternative to lead for cold storage
  • High specific heat in environments below 15K with magnetic phase transition
  • Spherical powder (average particle diameter 100-300μm) reduces gas pressure loss
  • Spherical particles do not deform or pulverize through long-term operation

Product specifications

  • HoCu2、HoCu、Er3Ni
  • Average particle diameter: 100-300μm. Inquire for other particle diameters.

Examples of uses

Examples of uses
  • MRI diagnostic devices
  • Magnetic levitation systems
  • Cryopumps
  • Superconductive filters for communication devices
  • Superconductive power storage facilities
  • Other devices used at ultra-low temperatures (devices for superconducting purposes)
  • GM (Gifford-McMahon) cryocoolers
  • Pulse tube cryocoolers

If you have any inquiries, please contact us.

Open 9:00am-5:00pm (business days)

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Related product

  • Amorphous Magnetic Parts
  • Samarium Cobalt Magnets
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