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4K-GM Cryocooler Performance and Thermal Conductivity of HoxEr1-xN

  • Takanori Nakano (a1), Yusuke Hirayama (a1), Takushi Izawa (a1), Takashi Nakagawa (a1), Yasushi Fujimoto (a2), Shinji Masuyama (a3), Toshio Irie (a4), Eiji Nakamura (a4) and Takao A. Yamamoto (a1)...

Abstract

HoxEr1-xN (x=0.25, 0.5, 0.75) samples were synthesized by nitriding of HoxEr1-x alloy bars and their thermal conductivity κ were measured. The measured κ values were comparable to those of stainless steel and Er3Ni. Ho0.5Er0.5N showed the highest κ of the present three samples. The thermal diffusivity calculated from the κ and the specific heat indicates that Ho0.5Er0.5N is a very promising regenerator material for the cryocoolers. The electrical resistivity ρ was also measured as a function of temperature.

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References

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Keywords

4K-GM Cryocooler Performance and Thermal Conductivity of HoxEr1-xN

  • Takanori Nakano (a1), Yusuke Hirayama (a1), Takushi Izawa (a1), Takashi Nakagawa (a1), Yasushi Fujimoto (a2), Shinji Masuyama (a3), Toshio Irie (a4), Eiji Nakamura (a4) and Takao A. Yamamoto (a1)...

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