Development of ultra-fast physical property measurement technique using adiabatic demagnetization method down to very low temperature

2014 Fiscal Year Final Research Report

• Project/Area Number: 25630059
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Thermal engineering
• Research Institution: Tohoku University
• Principal Investigator: AOKI Dai 東北大学, 金属材料研究所, 教授 (30359541)
• Co-Investigator(Kenkyū-buntansha): HONDA Fuminori 東北大学, 金属材料研究所, 准教授 (90391268)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 極低温 / 断熱消磁 / 重い電子系

Outline of Final Research Achievements

We succeeded in developing a adiabatic demagnetization refrigerator using chromium alum. The lowest temperature down to 0.1K can be achieved within 2 hours from room temperature for the resistivity measurements. The cooling rate is extraordinary fast compared to the conventional method. This technique can be applied for many aspects, for example, the search for new materials, new superconductors, characterization for samples and so on. Using our ADR, we have measured the resistivity down to 0.1K in many materials, such as URhGe, where we obtained high quality single crystals with RRR~100. The development of ADR was reported in the press. Our ADR will be commercially available soon, because of many requests from researchers.

Free Research Field

固体物性