Dielectric microcalorimeter utilizing a quantum ferroelectric thermometer

Shota Yoshimoto, Maehata Keisuke, Iyomoto Naoko, Mitsuda Kazuhisa, Yamasaki Noriko

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


A dielectric capacitance thermometer was fabricated using KTa0.99Nb0.01O3 (KTN) quantum ferroelectrics. The electric capacitance of the KTN thermometer was measured as a function of temperature from 0.1 to 300 K using the four-terminal-pair method. The KTN thermometer exhibited a dependence of the electric capacitance on the temperature that showed promise for using the thermometer as a microcalorimeter. A prototype of the dielectric microcalorimeter (DMC) was assembled with the KTN thermometer and irradiated with alpha rays with an energy of 5.5 MeV at a temperature of 100 mK. When applying a DC bias voltage to the DMC, the detection signals could be observed at the output of the preamplifier. A response of the DMC to alpha rays was obtained despite the poor signal-to-noise ratio caused by long wirings for the detection signal readout inside the refrigerator.

Original languageEnglish
Pages (from-to)868-873
Number of pages6
Journaljournal of nuclear science and technology
Issue number8
Publication statusPublished - Aug 3 2018

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering


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