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Precise magnetization measurements down to 500 mK using a miniature $$^3$$He cryostat and a closed-cycle $$^3$$He gas handling system installed in a SQUID magnetometer without continuous-cooling functionality

Shimamura, Kazutoshi*; Wajima, Hiroki*; Makino, Hayato*; Abe, Satoshi*; Haga, Yoshinori  ; Sato, Yoshiaki*; Kawae, Tatsuya*; Yoshida, Yasuo*

We have conducted precise magnetization measurements down to 500 mK using a commercial magnetometer. The gas handling system contains two sorption pumps filled with granular charcoals. $$^3$$He gas is pressurized up to ambient pressure for liquification at 3 K and the vapor is pumped for cooling. We demonstrate the performance of the system by observing the Meissner effect of aluminum below the superconducting transition temperature.

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Category:Physics, Applied

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