Development of 3He insert for Magnetization Measurements down to T =0.4 K with SQUID magnetometer

Yoshiaki Sato, Tadahiko Hasuo, Yuji Inagaki, Tatsuya Kawae

Research output: Contribution to journalConference article

Abstract

We have developed a 9-mm-diameter 3He insert for precise magnetization measurements down to T =0.4 K that is attachable to a commercial superconducting quantum interference device magnetometer. The insert is made from a thin-walled stainless steel pipe with an inner diameter of 6.2 mm, which determines the maximum sample size. 3He gas is condensed in the pipe, which is liquefied by 4He gas at T =1.8 K generated by the magnetometer via the heat exchanger of a Cu vacuum jacket with an outer diameter of 8.6mm soldered to the stainless steel pipe. The temperature of the insert is decreased to T 0=.5 K by evacuating liquid 3He using a rotary pump and then to T -0.36 K with a sorption pump. From the diamagnetization signal of a superconducting Al chip with a mass below 0.1 mg, the magnetization resolution with the insert is confirmed to be less than 10-7 emu. We measure the temperature dependence of magnetization down to T =0.5 K in PrxLa1-xPb3, which is a good candidate for the reality of the quadrupolar Kondo effect, using the 3He insert. Non-Fermi liquid behavior of the nonlinear susceptibility in χ3 with a -lnT dependence is detected in the [100] and [110] directions below T =2.5 K, suggesting the screening of quadrupolar moments. In contrast, χ3 in the [111] direction becomes constant below T =3 K. The observed features indicate that a low-lying Γ3 doublet plays a crucial role in the anomalous properties of PrxLa1-xPb3.

Original languageEnglish
Article number012147
JournalJournal of Physics: Conference Series
Volume592
Issue number1
DOIs
Publication statusPublished - Jan 1 2014
Event2014 International Conference on Strongly Correlated Electron Systems, SCES 2014 - Grenoble, France
Duration: Jul 7 2014Jul 14 2014

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inserts
magnetometers
magnetization
stainless steels
evacuating
pumps
jackets
Kondo effect
heat exchangers
liquids
gases
sorption
screening
chips
moments
magnetic permeability
interference
vacuum
temperature dependence
temperature

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Development of 3He insert for Magnetization Measurements down to T =0.4 K with SQUID magnetometer. / Sato, Yoshiaki; Hasuo, Tadahiko; Inagaki, Yuji; Kawae, Tatsuya.

In: Journal of Physics: Conference Series, Vol. 592, No. 1, 012147, 01.01.2014.

Research output: Contribution to journalConference article

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