Chinese Journal of Magnetic Resonance >

2023 , Vol. 40 >Issue 1: 92 - 99

DOI: https://doi.org/10.11938/cjmr20223018

Magnetic Resonance Instrument & Technology

The Design and Characterization of Electron Spin Resonance Spectrometer Based on Double Split Ring Resonator

  • Peiwen LUO ,
  • Lun WANG ,
  • Zhe WU ,
  • Wenxu ZHANG
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  • 1. School of Physics, University of Electronic Science and Technology of China, Chengdu 611731, China
    2. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 611731, China

Received date: 2022-08-29

  Online published: 2022-10-13

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Abstract

In this paper, a microstrip resonator based on double split rings is used to build an electron spin resonance (ESR) measurement system. The resonator is optimized by the finite element electromagnetic simulation and the 3 dB bandwidth is 58.7 MHz. Due to the open structure of the resonator, large-size samples with high dielectric loss can be measured nondestructively. The ESR signal of 2,2-diphenyl-1-picrylhydrazyl (DPPH) powder with different quality is measured at room temperature, and the result indicated that the spin detection limit of this system can reach 9.66 ×1012 spins/Gs Hz1/2. It is demonstrated that the system can be used to characterize films deposited on different substrates such as silicon, glasses or ceramics regardless of its high frequency losses through the measurement of DPPH sample spin-coated on silicon and zerodur. Our system provides a convenient approach to research the defect of thin films and to characterize their performances within microwave frequency.

Key words： double split ring resonator; dielectric loss; thin film; electron spin resonance

Cite this article

Peiwen LUO , Lun WANG , Zhe WU , Wenxu ZHANG . The Design and Characterization of Electron Spin Resonance Spectrometer Based on Double Split Ring Resonator[J]. Chinese Journal of Magnetic Resonance, 2023 , 40(1) : 92 -99 . DOI: 10.11938/cjmr20223018

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