TY - JOUR
T1 - Precise magnetization measurements down to 500 mK using a miniature 3He cryostat and a closed-cycle 3He gas handling system installed in a SQUID magnetometer without continuous-cooling functionality
AU - Shimamura, Kazutoshi
AU - Wajima, Hiroki
AU - Makino, Hayato
AU - Abe, Satoshi
AU - Haga, Yoshinori
AU - Sato, Yoshiaki
AU - Kawae, Tatsuya
AU - Yoshida, Yasuo
N1 - Funding Information:
We thank Yuji Inagaki, Hiroyuki Tsujii, Kouichi Matsumoto, and Koichi Nunomura for valuable discussions and technical support. We also thank Sarah Hayashi for careful proofreading of the manuscript. This work was partially supported by Grants-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (no. 19K21845) and Shibuya science culture and sports foundation and Hitachi Metals-Materials Science Foundation.
Publisher Copyright:
© 2022 The Japan Society of Applied Physics
PY - 2022/5
Y1 - 2022/5
N2 - We have conducted precise magnetization measurements down to 0.5 K with a miniature 3He cryostat and a closed-cycle 3He gas handling system (GHS) for a superconducting quantum interference device magnetometer. The GHS contains two sorption pumps filled with granular charcoals. We pressurize 3He gas up to ambient pressure for the liquification at 3 K and then pump the vapor for cooling. The lowest sample temperature is ∼0.5 K and it can persist for 34 h. We demonstrate the performance of the system by observing the Meissner effect of aluminum below the superconducting transition temperature ∼1 K. We also measured the magnetization curve of the heavy-fermion superconductor CeCoIn5 resulting in successful observation of the lower critical field at 0.5 K.
AB - We have conducted precise magnetization measurements down to 0.5 K with a miniature 3He cryostat and a closed-cycle 3He gas handling system (GHS) for a superconducting quantum interference device magnetometer. The GHS contains two sorption pumps filled with granular charcoals. We pressurize 3He gas up to ambient pressure for the liquification at 3 K and then pump the vapor for cooling. The lowest sample temperature is ∼0.5 K and it can persist for 34 h. We demonstrate the performance of the system by observing the Meissner effect of aluminum below the superconducting transition temperature ∼1 K. We also measured the magnetization curve of the heavy-fermion superconductor CeCoIn5 resulting in successful observation of the lower critical field at 0.5 K.
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U2 - 10.35848/1347-4065/ac5bb0
DO - 10.35848/1347-4065/ac5bb0
M3 - Article
AN - SCOPUS:85131136401
SN - 0021-4922
VL - 61
JO - Japanese Journal of Applied Physics
JF - Japanese Journal of Applied Physics
IS - 5
M1 - 056502
ER -