Note: Highly sensitive superconducting quantum interference device microsusceptometers operating at high frequencies and very low temperatures inside the mixing chamber of a dilution refrigerator.
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.
Martínez-Pérez
M J
MJ
Instituto de Ciencia de Materiales de Aragón, CSIC-University of Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain.
Sesé
J
J
Luis
F
F
Drung
D
D
Schurig
T
T