63Cu and65Cu Fourier transform nuclear magnetic resonance studies

Lutz, O.; Oehler, H.; Kroneck, Peter M. H.

doi:10.1007/bf01408195

Cited by 42 publications

(20 citation statements)

References 25 publications

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“…Our value is in strong disagreement with the value of −0.78(13) from [14]. However, it is in reasonable agreement with the calculated values 0.71 using the [15,23], µ lit [13,14,24,25] and theoretical calculations using GXPF1 [10,16] FPD6 interaction [18] and 0.51 using the GXPF1 interaction [10,14]. The departure of this value from 1 is an extra indication of a non-pure p 3/2 nuclear configuration (see Fig.…”

supporting

confidence: 63%

“…This is due to the improved total resonance line width (3.5 GHz vs. 4.5 GHz), the larger separation of the hyperfine levels of the 3d 9 4s4p 4 P 1/2 level compared to the 3d 10 4p 2 P 1/2 level and the high number of independent measurements. Supported by the good agreement on the stable isotopes, the consistency of the ratio of the two hyperfine parameters and based on the precise knowledge of the magnetic moment of 63 Cu [24,25], the moments of 57,59,65 Cu are extracted, as detailed in [15], from both atomic levels. The results are given in Table I.…”

mentioning

confidence: 99%

“…All the magnetic moments of the copper isotopes [11,13,14,24,25]. Theoretical calculations using the GXPF1 interaction, a 40 Ca core and the full f p-shell valence space [10,16] is shown with a solid line.…”

mentioning

confidence: 99%

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Magnetic Dipole Moment ofCu57,59Measured by In-Gas-Cell Laser Spectroscopy

et al. 2009

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In-gas-cell laser spectroscopy study of the 57,59,63,65 Cu isotopes has been performed for the first time using the 244.164 nm optical transition from the atomic ground state of copper. The nuclear magnetic dipole moments for 57,59,65 Cu relative to that of 63 Cu have been extracted. The new value for 57 Cu of µ( 57 Cu) = +2.582(7)µN is in strong disagreement with the previous literature value but in good agreement with recent theoretical and systematic predictions.PACS numbers: 21.10. Ky, 27.40.+z, 27.50.+e, 42.62.Fi With more than 3000 nuclei known so far, the present nuclear chart offers a vast landscape to study mesoscopic systems. Many of these nuclei cannot be described by ab initio calculations and theory uses models based on a fundamental or phenomenological approach in order to describe observables of isotopes yet to discover. The confrontation of experimental data with the theoretical predictions does not only allow for fine tuning of theory but also for discovering new aspects of the interactions at work in the atomic nucleus. This is especially the case when studying isotopes with extreme proton-toneutron ratios. In nuclear structure, the identification of the magic numbers 2, 8, 20, 28, 50, 82, 126 [1] is the foundation for the shell model of the nucleus. While these magic numbers are well established in nuclei close to the valley of β-stability, their universality is strongly questioned [2].Of special interest is the magic number 28 as it is the smallest magic number issued from the spin-orbit interaction added to the nuclear potential. Both the N = 28 isotones [3,4] and the nickel (Z = 28) isotopes [5,6] are under intensive investigation to probe their magic character. With N = Z = 28, 56 Ni is expected to be doubly magic. While it displays a high 2 + 1 excited state in comparison to the other nickel isotopes [5] and a sudden change in the two-neutron and two-proton separation energies [7], both characteristic of a doubly magic nucleus, the evolution of the transition strength B(E2) and the behavior of the nuclei in the vicinity point towards particle excitations across the shell gaps and a breaking of this magic core [8,9,10].The nuclear magnetic dipole moment is a very sensitive tool to study the nuclear structure in the vicinity of magic nuclei.

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supporting

confidence: 63%

mentioning

confidence: 99%

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Magnetic Dipole Moment ofCu57,59Measured by In-Gas-Cell Laser Spectroscopy

et al. 2009

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“…The paramagnetic shielding for CuCl, however, is substantial and has experimentally been determined by Lutz et al [37,38] to be 63 σ iso para (CuCl) = −1500 ppm with an error of about 10 ppm. As it was done in [36] we introduce the notation of paramagnetic field modification k K ii L = − k σ ii para .…”

Section: Orbital Shiftsmentioning

confidence: 97%

Effects of Substrate Eddy Current on Magnetic Anisotropy in Permalloy Underlayer for Perpendicular Media

Ishibashi¹,

Mallary²

1992

Jpn. J. Appl. Phys.

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The local electronic structure of Nd 2 CuO 4 is determined from ab initio cluster calculations in the framework of density functional theory. Spin-polarized calculations with different multiplicities enable a detailed study of the charge and spin density distributions, using clusters that comprise up to 13 copper atoms in the CuO 2 plane. Electron doping is simulated by two different approaches and the resulting changes in the local charge distribution are studied in detail and compared to the corresponding changes in hole-doped La 2 CuO 4 . The electric field gradient (EFG) at the copper nucleus is investigated and good agreement is found with experimental values. In particular a careful study of the various contributions to the EFG exhibits that the drastic reduction of the main component of the EFG in the electron-doped material with respect to La 2 CuO 4 is due to a reduction of the occupancy of the 3d 3z 2 −r 2 atomic orbital. Furthermore, the chemical shieldings at the copper nucleus are determined and are compared to results obtained from nuclear magnetic resonance (NMR) measurements. The magnetic hyperfine coupling constants are derived from the spin density distribution calculated for different spin multiplicities.

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“…(11) The paramagnetic shielding for CuCl, however, is substantial and has experimentally been determined by Lutz et al 38,39 to be 63 σ iso para (CuCl) = −1500 ppm with an error of about 10 ppm. As it was done in Ref.…”

Section: E Orbital Shiftsmentioning

confidence: 99%

First principles study of local electronic and magnetic properties in pure and electron-doped Nd₂CuO₄

Bersier¹,

Renold²,

Stoll³

et al. 2006

J. Phys.: Condens. Matter

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The local electronic structure of Nd2CuO4 is determined from ab-initio cluster calculations in the framework of density functional theory. Spin-polarized calculations with different multiplicities enable a detailed study of the charge and spin density distributions, using clusters that comprise up to 13 copper atoms in the CuO2 plane. Electron doping is simulated by two different approaches and the resulting changes in the local charge distribution are studied in detail and compared to the corresponding changes in hole doped La2CuO4. The electric field gradient (EFG) at the copper nucleus is investigated in detail and good agreement is found with experimental values. In particular the drastic reduction of the main component of the EFG in the electron-doped material with respect to La2CuO4 is explained by a reduction of the occupancy of the 3d 3z 2 −r 2 atomic orbital. Furthermore, the chemical shieldings at the copper nucleus are determined and are compared to results obtained from NMR measurements. The magnetic hyperfine coupling constants are determined from the spin density distribution.

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63Cu and65Cu Fourier transform nuclear magnetic resonance studies

Cited by 42 publications

References 25 publications

Magnetic Dipole Moment ofCu57,59Measured by In-Gas-Cell Laser Spectroscopy

Magnetic Dipole Moment ofCu57,59Measured by In-Gas-Cell Laser Spectroscopy

Effects of Substrate Eddy Current on Magnetic Anisotropy in Permalloy Underlayer for Perpendicular Media

First principles study of local electronic and magnetic properties in pure and electron-doped Nd₂CuO₄

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63Cu and65Cu Fourier transform nuclear magnetic resonance studies

Cited by 42 publications

References 25 publications

Magnetic Dipole Moment ofCu57,59Measured by In-Gas-Cell Laser Spectroscopy

Magnetic Dipole Moment ofCu57,59Measured by In-Gas-Cell Laser Spectroscopy

Effects of Substrate Eddy Current on Magnetic Anisotropy in Permalloy Underlayer for Perpendicular Media

First principles study of local electronic and magnetic properties in pure and electron-doped Nd2CuO4

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First principles study of local electronic and magnetic properties in pure and electron-doped Nd₂CuO₄