Note: Highly sensitive superconducting quantum interference device microsusceptometers operating at high frequencies and very low temperatures inside the mixing chamber of a dilution refrigerator

M J Martínez-Pérez; J Sesé; F Luis; D Drung; T Schurig

doi:10.1063/1.3280169

Note: Highly sensitive superconducting quantum interference device microsusceptometers operating at high frequencies and very low temperatures inside the mixing chamber of a dilution refrigerator

Rev Sci Instrum. 2010 Jan;81(1):016108. doi: 10.1063/1.3280169.

Authors

M J Martínez-Pérez¹, J Sesé, F Luis, D Drung, T Schurig

Affiliation

¹ Instituto de Ciencia de Materiales de Aragón, CSIC-University of Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain.

PMID: 20113139
DOI: 10.1063/1.3280169

Abstract

We report the experimental results that show the operation of superconducting quantum interference device (SQUID) microsusceptometers immersed in the (3)He-(4)He mixture inside the mixing chamber of a dilution refrigerator at high frequency (1 MHz) and down to very low temperatures (13 mK). The devices are based on highly sensitive and easy-to-use commercial SQUID sensors. The integrated susceptometers are fabricated by rerouting some connections of the SQUID's input circuit. Examples of measurements on molecular magnets Mn(12) and HoW(10) are shown.