Fig. 1. ²⁷Al MAS-NMR spectra from 14 T to 40 T. Reprinted with permission from Gan et al., J. Am. Chem. Soc. 124, 5634 (2002). Copyright 2002 American Chemical Society.

Fig. 2. (a) Background pulsed magnetic field. (b) ⁶³Cu FID at 12 T; (c) Fourier transform of ⁶³Cu FID at 33 T. Reprinted with permission from Haas et al., J. Magn. Magn. Mater. 272-276, e1623 (2004). Copyright 2004 Elsevier.

Fig. 3. ¹H FID under a 50 T pulsed high magnetic field. Reprinted with permission from Haas et al., Solid State Nucl. Magn. Reson. 28, 64 (2005). Copyright 2005 Elsevier.

Fig. 4. (a) ⁵⁹Co NMR spectra under a steady field. Reprinted with permission from Kawasaki et al., Phys. Rev. B 79, 220514 (2009). Copyright 2009 American Physical Society. (b) ⁵⁹Co NMR spectra under a pulsed field. Reprinted with permission from Zheng et al., J. Phys. Soc. Jpn. 78, 095001 (2009). Copyright 2009 The Physical Society of Japan.

Fig. 5. Scheme of the pulsed NMR spectrometer at HLD. Reprinted with permission from Meier et al., Rev. Sci. Instrum. 83, 083113 (2012). Copyright 2012 AIP Publishing LLC.

Fig. 6. Scheme of the pulsed NMR spectrometer at LNCMI. Reprinted with permission from Stork et al., J. Magn. Reson. 234, 30 (2013). Copyright 2013 Elsevier.

Fig. 7. Magnetic field homogeneity of the pulsed magnet at LNCMI at 12.5 T and 47 T. Reprinted with permission from Orlova et al., J. Magn. Reson. 268, 82 (2016). Copyright 2016 Elsevier.

Fig. 8. (a) Initial value of the induced electromotive force measured synchronously with the FID signal. Reprinted with permission from Iijima et al., J. Magn. Reson. 184, 258 (2007). Copyright 2007 Elsevier. (b) ¹H spectrum before and after deconvolution. Reprinted with permission from Stork et al., J. Magn. Reson. 234, 30 (2013). Copyright 2013 Elsevier.

Fig. 9. Spectrogram of the FID signal of a single-pulse peak segment: (a) 7 T; (b) 62 T. Reprinted with permission from Meier et al., J. Magn. Reson. 210, 1 (2011). Copyright 2011 Elsevier.

Fig. 10. (a) FID signals of Linde A (weak, left) and ²⁷Al (strong, right) under a 55.7 T pulsed field. (b) Adiabatic reversal experiment for measuring T₁ in a pulsed field. Reprinted with permission from Kohlrautz et al., J. Magn. Reson. 263, 1 (2016). Copyright 2016 Elsevier.

Fig. 11. Overview of procedure for reconstruction of broad spectra in a pulsed magnetic field using the normalized deconvolution method. For more details, see Ref. 53. Reprinted with permission from Kohlrautz et al., J. Magn. Reson. 271, 52 (2016). Copyright 2016 Elsevier.

Fig. 12. (a) EIIA^Glc titration results with an 800 MHz NMR spectrometer. (b) Surface mapped by residues with chemical shift perturbations >3 Hz. Reprinted with permission from Xing et al., Angew. Chem., Int. Ed. 53, 1 (2014). Copyright 2014 John Wiley and Sons.

Fig. 13. Resonance spectra of YBa₂Cu₃O_x in a pulsed 47 T field. The black solid line is the sum of several experiments (2.5 K). Reprinted with permission from Stork et al., J. Magn. Reson. 234, 30 (2013). Copyright 2013 Elsevier.

Fig. 14. (a) CeIn₃ NMR spectra (56 T) at different temperatures. (b) CeIn₃ NMR spectra (1.5 K) at different magnetic field intensities. Reprinted with permission from Tokunaga et al., Phys. Rev. B 99, 085142 (2019). Copyright 2019 American Physical Society.

Fig. 15. (a) Curve of average magnetization of SrCu₂(BO₃)₂ vs magnetic intensity.^81–84 (b) NMR spectra of ¹¹B under pulsed 54 T (blue) and steady 41 T (black) magnetic fields (2 K). (c) Magnetic superlattice in the 1/3 magnetization plateau. Reprinted with permission from Kohlrautz et al., J. Magn. Reson. 271, 52 (2016). Copyright 2016 Elsevier.

Fig. 16. Field dependence of the normalized spin polarization Sz/Szsat and distribution widths of the internal magnetic field ΔH_int obtained from the ⁵¹V PF-NMR spectra in LiCuVO₄ (H ‖ c). Reprinted with permission from Orlova et al., Phys. Rev. Lett. 118, 247201 (2017). Copyright 2017 American Physical Society.

Fig. 17. Structure of a traditional NMR spectrometer.

Fig. 18. NMR detection environment in a pulsed magnetic field.

Table 1. NMR signal processing strategies in unstable magnetic fields.

Table 2. Research status of NMR in unsteady high magnetic fields worldwide.

Table 3. Progress in FTPMF research worldwide.