Development of Hybrid-Type Pressure Cell for High-Pressure and High-Field ESR Measurement
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Appl Magn Reson (2013) 44:893–898 DOI 10.1007/s00723-013-0441-2
Magnetic Resonance
Development of Hybrid-Type Pressure Cell for HighPressure and High-Field ESR Measurement Kohdai Fujimoto • Takahiro Sakurai • Susumu Okubo • Hitoshi Ohta • Kazuyuki Matsubayashi • Yoshiya Uwatoko Kazutaka Kudo • Yoji Koike
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Received: 26 November 2012 / Revised: 6 January 2013 / Published online: 8 February 2013 Ó Springer-Verlag Wien 2013
Abstract A hybrid-type piston-cylinder pressure cell for the electron spin resonance (ESR) measurement has been developed. The cylinder of this pressure cell consists of a NiCrAl inner cylinder and a CuBe outer sleeve, and all inner parts are made of zirconium oxide which has good transmittance to the millimeter and submillimeter waves. We confirmed that the pressure reaches 2.1 GPa. We have also developed a transmission-type high-field ESR system having two different modulation methods for this pressure cell. A test measurement without pressure cell for the two-dimensional orthogonal-dimer spin system of SrCu2(BO3)2 has been done successfully in the wide frequency region. The combination of this electromagnetic K. Fujimoto H. Ohta Graduate School of Science, Kobe University, Kobe 657-8501, Japan T. Sakurai (&) Center for Supports to Research and Education Activities, Kobe University, Kobe 657-8501, Japan e-mail: [email protected] S. Okubo H. Ohta Molecular Photoscience Research Center, Kobe University, Kobe 657-8051, Japan K. Matsubayashi Y. Uwatoko Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan K. Kudo Department of Physics, Okayama University, Okayama 700-8530, Japan Y. Koike Department of Applied Physics, Tohoku University, Sendai 980-8579, Japan
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wave transmission-type pressure cell and this high-field ESR system is a promising tool for the study of the pressure-induced phase transition of SrCu2(BO3)2.
1 Introduction The high-pressure and high-field electron spin resonance (ESR) measurement is a powerful means to clarify spin state of a magnetic material under pressure. So far, we have developed the high-pressure and high-field ESR systems using single-pass transmission technique [1, 2]. In order to detect the transmitted electromagnetic wave through the pressure cell, we developed millimeter and submillimeter wave transmission type piston-cylinder pressure cell whose inner parts were all made of zirconium oxide. Zirconium oxide has good transmittance to millimeter and submillimeter waves, and this enables us to observe ESR of materials subjected to the pressure in the wide frequency region from 70 to 700 GHz [1]. We combined it with the ESR system using pulsed high magnetic field [1] or the commercial magnetometer equipped with the superconducting quantum interference device (SQUID) [2]. The maximum pressure reaches 1.5 GPa [2] which corresponds to the upper limit of this kind of pressure cell. Other group’s high-pressure and high-field ESR system employing the piston-cylinder pressure cell is also limited to the si
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