高频高场下EPR谱仪的研究进展

doi:10.11938/cjmr20233051

摘要/Abstract

摘要：

电子顺磁共振（EPR）是一种研究磁性材料微观信息的测量手段．由于早期的EPR研究受到磁场强度和微波频率的限制，一些材料相关的微观信息并不能得到清晰地显示．近些年来，随着强磁场技术和微波技术的发展，连续波电子顺磁共振（cw-EPR）谱仪和脉冲电子顺磁共振（pulsed EPR）谱仪在高频高场下得到了充分的应用，同时谱仪的灵敏度和分辨率等技术指标也得到了比较好的提升．本文主要介绍了在高频高场下EPR谱仪的原理和构造，国内外发展历程和研究现状，以及在相关领域的最新应用．

关键词: 电子顺磁共振（EPR）, EPR谱仪, 综述, 高频高场

Abstract:

Electron paramagnetic resonance (EPR) is a measurement method to research the microscopic information of magnetic materials. Because early EPR studies were limited by magnetic field strength and microwave frequency, some microscopic information of materials could not be clearly displayed. In recent years, with the development of high magnetic field technology and microwave technology, continuous wave electron paramagnetic resonance (cw-EPR) spectrometer and pulsed electron paramagnetic resonance (pulsed EPR) spectrometer have been fully used under high frequency and high field, and the sensitivity, spectral resolution and other performance indicators of the spectrometer have also been improved. This paper mainly introduces the principle and structure of EPR spectrometer under high frequency and high field, its development history and research status both domestically and internationally, and the latest application in related fields.

Key words: electron paramagnetic resonance (EPR), EPR spectrometer, review, high frequency and high field

中图分类号:

O482.53

孔令文, 匡光力, 吴向阳. 高频高场下EPR谱仪的研究进展[J]. 波谱学杂志, 2023, 40(3): 341-364.

KONG Lingwen, KUANG Guangli, WU Xiangyang. Research Progress of EPR Spectrometer Under High Frequency and High Field[J]. Chinese Journal of Magnetic Resonance, 2023, 40(3): 341-364.

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Laboratory	EPR spectrometer	B/T	v/GHz	T/K
The National High Magnetic Field Laboratory (NHMFL, US)	Heterodyne quasi-optical spectrometer	12.5	120~336	1.5~400
	Transmission spectrometer	15/17	24~660	3~309
	W-band HiPER spectrometer	9	94	4~300
	Broadband BWO spectrometer	25	70~1 200	Depends on the cryostat used
	Broadband MVNA spectrometer	45	8~1 000	0.5~400
	XW-band Bruker pulsed spectrometer	6	9~94	4~300
The Dresden High Magnetic Field Laboratory (HLD, Germany)	Transmission-probe multi-frequency spectrometer	70	0.1~9 000	1.5~300
The Grenoble and Toulouses National High Magnetic Field Laboratory (LNCMI, France)	Multifrequency EPR spectrometer operating	16	95~770	2.1~300
The Nijmegen High Field Magnet Laboratory (HFML, Netherlands)	Free-electron lasers multifrequency EPR spectrometer	33	0.25~120 000	4~300

Place	Source	v/GHz	Detector	B/T	T/K
Sendai	Vector network	50~120	Diode	20	0.2~300
Tsukuba	FIR laser	250~3 000	InSb	40	1.8~300
Kashiwa	FIR laser	250~5 000	InSb	150	10~300
Yokohama	Gunn etc.	20~110	InSb	16	1.8~300
	FIR laser	600~7 000
	Vector network	30~660	Diode
Fukui	Gunn	95~120	InSb	40	1.8~300
	Gyrotron	<610	InSb
	Vector network	82~800	Diode	12
Osaka	Gunn	94	InSb	55	1.4~300
	FIR laser	326~3 100
Kobe	Gunn＋multi	30~315	InSb	40	1.8~300
	BWO	180~1 200
	FIR laser	250~7 000
Okayama	Gunn	35~100	InSb	40	0.5~300
	BWO	300
	FIR laser	250~7 000		30