Development of Very-Low-Temperature Millimeter-Wave Electron-Spin-Resonance Measurement System


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We report the development of a millimeter-wave electron-spin-resonance (ESR) measurement system at the University of Fukui using a 3He/4He dilution refrigerator to reach temperatures below 1 K. The system operates in the frequency range of 125–130 GHz, with a homodyne detection. A nuclear-magnetic-resonance (NMR) measurement system was also developed in this system as the extension for millimeter-wave ESR/NMR double magnetic-resonance (DoMR) experiments. Several types of Fabry–Pérot-type resonators (FPR) have been developed: A piezo actuator attached to an FPR enables an electric tuning of cavity frequency. A flat mirror of an FPR has been fabricated using a gold thin film aiming for DoMR. ESR signal was measured down to 0.09 K. Results of ESR measurements of an organic radical crystal and phosphorous-doped silicon are presented. The NMR signal from 1H contained in the resonator is also detected successfully as a test for DoMR.

Sobre autores

Y. Fujii

Research Center for Development of Far-Infrared Region, University of Fukui

Autor responsável pela correspondência
Email: fujii@apphy.u-fukui.ac.jp
ORCID ID: 0000-0001-6357-3795
Japão, Fukui, 910-8507

Y. Ishikawa

Department of Applied Physics, Graduate School of Engineering, University of Fukui

Email: fujii@apphy.u-fukui.ac.jp
Japão, Fukui, 910-8507

K. Ohya

Research Center for Development of Far-Infrared Region, University of Fukui; KYOCERA Corporation

Email: fujii@apphy.u-fukui.ac.jp
Japão, Fukui, 910-8507; Kyoto

S. Miura

Department of Applied Physics, Graduate School of Engineering, University of Fukui; Furukawa Electric Co., Ltd

Email: fujii@apphy.u-fukui.ac.jp
Japão, Fukui, 910-8507; Tokyo

Y. Koizumi

Research Center for Development of Far-Infrared Region, University of Fukui

Email: fujii@apphy.u-fukui.ac.jp
Japão, Fukui, 910-8507

A. Fukuda

Department of Physics, Hyogo College of Medicine

Email: fujii@apphy.u-fukui.ac.jp
Japão, Mukogawacho 1-1, Nishinomiya, Hyogo, 663-8501

T. Omija

Research Center for Development of Far-Infrared Region, University of Fukui

Email: fujii@apphy.u-fukui.ac.jp
Japão, Fukui, 910-8507

S. Mitsudo

Research Center for Development of Far-Infrared Region, University of Fukui

Email: fujii@apphy.u-fukui.ac.jp
Japão, Fukui, 910-8507

T. Mizusaki

Research Center for Development of Far-Infrared Region, University of Fukui

Email: fujii@apphy.u-fukui.ac.jp
Japão, Fukui, 910-8507

A. Matsubara

Department of Physics, Kyoto University

Email: fujii@apphy.u-fukui.ac.jp
Japão, Kyoto, 606-8501

H. Yamamori

Technical Division, School of Engineering, University of Fukui

Email: fujii@apphy.u-fukui.ac.jp
Japão, Fukui, 910-8507

T. Komori

Department of Applied Physics, Graduate School of Engineering, University of Fukui

Email: fujii@apphy.u-fukui.ac.jp
Japão, Fukui, 910-8507

K. Morimoto

Department of Applied Physics, Graduate School of Engineering, University of Fukui; Nidec Corporation

Email: fujii@apphy.u-fukui.ac.jp
Japão, Fukui, 910-8507; Kyoto

H. Kikuchi

Department of Applied Physics, Graduate School of Engineering, University of Fukui

Email: fujii@apphy.u-fukui.ac.jp
Japão, Fukui, 910-8507

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