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Nuclear quadrupole resonance

About: Nuclear quadrupole resonance is a research topic. Over the lifetime, 3531 publications have been published within this topic receiving 38801 citations. The topic is also known as: Nuclear quadrupole resonance spectroscopy & NQR.


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Journal ArticleDOI
TL;DR: Using Cu nuclear quadrupole resonance (NQR) in Eu-doped La2-xSrxCuO4 the authors find the evidence of the pinned stripe phase at 1.3 K for 0.18 correlating with the onset of bulk superconductivity corresponds to the depinning of the stripe phase.
Abstract: Using Cu nuclear quadrupole resonance (NQR) in Eu-doped La2-xSrxCuO4 we find the evidence of the pinned stripe phase at 1.3 K for 0. 08 0.18 correlating with the onset of bulk superconductivity corresponds to the depinning of the stripe phase.

38 citations

Journal ArticleDOI
TL;DR: In this paper, a wideband feedback coherence control system for super-regenerative NQR spectrometers is described, which makes use of a servo motor to adjust the oscillator grid bias.
Abstract: A description is given of a wideband feedback coherence control system for superregenerative NQR spectrometers. By making use of a servo motor to adjust the oscillator grid bias, increases in rf searching band are possible. As an example, a bandwidth of 30 Mc around a center frequency of 70 Mc has been obtained. The sensitivity of the circuit to nuclear quadrupole resonance signals is high. The spectrometer will operate unattended.

38 citations

Journal ArticleDOI
TL;DR: The 35 Cl nuclear quadrupole resonance spectrum of a single crystal of sodium chlorate rotating about two axes reflects a non-Abelian gauge potential, an example of Wilczek and Zee's generalization of Berry's phase to the adiabatic transport of degenerate states.
Abstract: The 35 Cl nuclear quadrupole resonance spectrum of a single crystal of sodium chlorate rotating about two axes reflects a non-Abelian gauge potential. This gauge potential is an example of Wilczek and Zee's generalization of Berry's phase to the adiabatic transport of degenerate states

38 citations

Journal ArticleDOI
TL;DR: The temperature dependence of the pure nuclear quadrupole resonance frequencies in three solid phases of para-dichlorobenzene has been measured in the range of 77° to 300°K and compared with the measurements of Babushkina and Baisa.
Abstract: The temperature dependence of the pure nuclear quadrupole resonance frequencies in three solid phases of para‐dichlorobenzene has been measured in the range of 77° to 300°K and compared with the measurements of Babushkina and Baisa. Good agreement with the Bayer—Kushida theory is obtained.

38 citations

Journal ArticleDOI
TL;DR: The atomic ordering of the Na layers is therefore at the source of this ordered distribution of cobalt charges, and the method used here to resolve the Na ordering and the subsequent Co charge order can be used valuably for similar structural determinations for various phases with $xg0.45$ for which Na ordering has been established as discussed by the authors.
Abstract: We have synthesized various samples of the $x=2/3$ phase of sodium cobaltate ${\text{Na}}_{x}{\text{CoO}}_{2}$ and performed x-ray powder diffractions spectra to compare the diffraction with the structure proposed previously from NMR and nuclear quadrupole resonance (NQR) experiments [H. Alloul, I. R. Mukhamedshin, T. A. Platova, and A. V. Dooglav, EPL 85, 47006 (2009)]. Rietveld analyses of the data are found in perfect agreement with those and confirm the concentration $x=2/3$ obtained in the synthesis procedure. They even give indications on the atomic displacements of Na inside the unit cell. The detailed NQR data allow us to identify the NQR transitions and electric field gradient parameters for four cobalt sites and three Na sites. The spin-lattice and spin-spin relaxation rates are found much smaller for the nonmagnetic ${\text{Co}}^{3+}$ sites than for the magnetic sites on which the holes are delocalized. The atomic ordering of the Na layers is therefore at the source of this ordered distribution of cobalt charges. The method used here to resolve the Na ordering and the subsequent Co charge order can be used valuably for similar structural determinations for various phases with $xg0.45$ for which Na ordering has been established.

38 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202320
202237
202116
202036
201928
201829