Development of tunneling junction refrigerator with ferromagnetic effect

2015 Fiscal Year Final Research Report

• Project/Area Number: 25286046
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Applied materials
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: Kashiwaya Satoshi 国立研究開発法人産業技術総合研究所, 電子光技術研究部門, 首席研究員 (40356770)
• Co-Investigator(Kenkyū-buntansha): Matsuda Kenichi 日本大学, 理工学部, 准教授 (80360931) ; Kawabata Shiro 国立研究開発法人産業技術総合研究所, 電子光技術部門, 主任研究員 (30356852)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 固体冷凍器 / トンネル接合

Outline of Final Research Achievements

We develop a superconducting-normal metal-superconductor tunneling junction refrigerator of a suspended normal-metal type for cooling of high sensitive sensors working at ultralow temperature. The performance of the refrigerator is evaluated by comparing experimental conductance with numerical results of a theoretical formulation. The lowest temperature of 0.093 K at a bath temperature of 0.334 K indicates the successful operation of the refrigeration. The maximum cooling power of the present refrigerator estimated based on the non-equilibrium stationary state model is 213 pW at the junction area of 40 x 7 m2.

Free Research Field

低温物性