NMR signal averaging in 62T pulsed fields

Meier, Benno; Greiser, Sebastian; Haase, Jürgen; Herrmannsdörfer, T.; Wolff-Fabris, F.; Wosnitza, J.

doi:10.1016/j.jmr.2011.02.007

Cited by 32 publications

(19 citation statements)

References 19 publications

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“…In addition, in the period of rapid change of an applied time-dependent magnetic field, the FID signal frequency is dramatically modulated by the magnetic field, resulting in spectral line broadening [ 20 ]. Preserving only the first largest singular value in the noise reduction procedure can naturally achieve a highest improvement in SINR.…”

Section: Discussionmentioning

confidence: 99%

SVD-Based Technique for Interference Cancellation and Noise Reduction in NMR Measurement of Time-Dependent Magnetic Fields

Zhang

2016

Sensors

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A nuclear magnetic resonance (NMR) experiment for measurement of time-dependent magnetic fields was introduced. To improve the signal-to-interference-plus-noise ratio (SINR) of NMR data, a new method for interference cancellation and noise reduction (ICNR) based on singular value decomposition (SVD) was proposed. The singular values corresponding to the radio frequency interference (RFI) signal were identified in terms of the correlation between the FID data and the reference data, and then the RFI and noise were suppressed by setting the corresponding singular values to zero. The validity of the algorithm was verified by processing the measured NMR data. The results indicated that, this method has a significantly suppression of RFI and random noise, and can well preserve the FID signal. At present, the major limitation of the proposed SVD-based ICNR technique is that the threshold value for interference cancellation needs to be manually selected. Finally, the inversion waveform of the applied alternating magnetic field was given by fitting the processed experimental data.

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Section: Discussionmentioning

confidence: 99%

SVD-Based Technique for Interference Cancellation and Noise Reduction in NMR Measurement of Time-Dependent Magnetic Fields

Zhang

2016

Sensors

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“…For example, the pulsed-field calorimetry [58] might be a useful technique to measure the proposed algebraic low-T specific heat of the phase [51]. Besides, the nuclear magnetic resonance and electron spin resonance spectroscopy under high fields [59,60] are also very promising approaches for probing low-energy excitations in the intermediate QSL phase discovered here.…”

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confidence: 87%

Intermediate Quantum Spin Liquid Phase in the Kitaev Material $α$-RuCl$_3$ under High Magnetic Fields up to 100 T

Zhou¹,

Li²,

Matsuda³

et al. 2022

Preprint

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Pursuing the exotic quantum spin liquid (QSL) state in the Kitaev material α-RuCl3 has intrigued great research interest recently. A fascinating question is on the possible existence of field-induced QSL phase in this compound. Here we perform a high-field measurement of the magnetization process of α-RuCl3 up to 102 T employing the non-destructive and destructive pulsed magnets. Under the out-of-plane field along the c * axis (i.e., perpendicular to the honeycomb plane), two quantum phase transitions are uncovered at respectively 36 T and about 83 T, between which there lies an intermediate phase as the predicted QSL. By measuring the magnetization data with fields tilted from the c * axis up to 90 • (i.e., in-plane direction), we obtain the field-angle phase diagram that contains the zigzag, paramagnetic, and QSL phases. Based on the accurate K-J-Γ-Γ model of α-RuCl3, we perform density matrix renormalization group simulations and reproduce the quantum phase diagram in excellent agreement with experiments.

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“…It has been demonstrated, for example, that NMR experiments are feasible in high-field pulsed magnets. Such systems are sited at Dresden and Toulouse [91,92] and use purely resistive magnets fed by DC currents generated by large power supplies or capacitor banks. These have led to NMR spectra in the 40–70 T range; such pulse magnets, however, have a compact structure that does not provide the field homogeneity and stability required for high-resolution NMR spectroscopy.…”

Section: Enhancing Sensitivity By Increased Magnetic Fieldsmentioning

confidence: 99%

Facing and Overcoming Sensitivity Challenges in Biomolecular NMR Spectroscopy

et al. 2015

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In the Spring of 2013, NMR spectroscopists convened at the Weizmann Institute in Israel to brainstorm on approaches to improve the sensitivity of NMR experiments, particularly when applied in biomolecular settings. This multi-author interdisciplinary Review presents a state-of-the-art description of the primary approaches that were considered. Topics discussed included the future of ultrahigh-field NMR systems, emerging NMR detection technologies, new approaches to nuclear hyperpolarization, and progress in sample preparation. All of these are orthogonal efforts, whose gains could multiply and thereby enhance the sensitivity of solid- and liquid-state experiments. While substantial advances have been made in all these areas, numerous challenges remain in the quest of endowing NMR spectroscopy with the sensitivity that has characterized forms of spectroscopies based on electrical or optical measurements. These challenges, and the ways by which scientists and engineers are striving to solve them, are also addressed.

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NMR signal averaging in 62T pulsed fields

Cited by 32 publications

References 19 publications

SVD-Based Technique for Interference Cancellation and Noise Reduction in NMR Measurement of Time-Dependent Magnetic Fields

SVD-Based Technique for Interference Cancellation and Noise Reduction in NMR Measurement of Time-Dependent Magnetic Fields

Intermediate Quantum Spin Liquid Phase in the Kitaev Material $α$-RuCl$_3$ under High Magnetic Fields up to 100 T

Facing and Overcoming Sensitivity Challenges in Biomolecular NMR Spectroscopy

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