Physical Review B, volume 104, issue 15, publication number 155148

5f -electron magnetism in single crystal UN probed by N14 NMR

VERKHOVSKII S. V. 1
Piskunov Y. V. 1
Germov A. Y. 1
Gubkin A. F. 1, 4
Publication typeJournal Article
Publication date2021-10-27
Quartile SCImago
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Quartile WOS
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Impact factor3.7
ISSN24699950, 24699969, 10980121, 1550235X
Abstract
Spin susceptibility and low-frequency dynamics of uranium $5f$ electrons have been investigated by nuclear magnetic resonance (NMR) on the $^{14}\mathrm{N}$ nuclei in paramagnetic and magnetically ordered phases for single crystalline and polycrystalline samples of uranium mononitride (UN). NMR spectra, shifts of the $^{14}\mathrm{N}$ NMR lines, and the spin-lattice relaxation times ${T}_{1}$ have been obtained in the temperature range $T=10--760\phantom{\rule{0.16em}{0ex}}\mathrm{K}$ in magnetic field $B=92.8\phantom{\rule{0.16em}{0ex}}\mathrm{kOe}$. It is shown that in the UN paramagnetic phase, temperature dependence of the $^{14}\mathrm{N}$ NMR line shift is proportional to the spin susceptibility of the uranium $5f$ electrons. Joint analysis of NMR and magnetic susceptibility data allows us to determine temperature dependence of spin fluctuation energy ${\mathrm{\ensuremath{\Gamma}}}_{\mathrm{nmr}}(T)$ of the uranium $5f$ electrons and to demonstrate that its temperature variation is close to $\mathrm{\ensuremath{\Gamma}}(T)\ensuremath{\propto}{T}^{0.5}$ dependence which is characteristic of the concentrated Kondo systems above the coherent state formation temperature. In the magnetically ordered UN phase the $^{14}\mathrm{N}$ NMR spectra consist of several lines that can be explained in terms of the model of type $I$ antiferromagnetic order corresponding to $1k$ structure in the presence of magnetic domains.
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Ogloblichev V. V. et al. 5f -electron magnetism in single crystal UN probed by N14 NMR // Physical Review B. 2021. Vol. 104. No. 15. 155148
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Ogloblichev V. V., VERKHOVSKII S. V., Verkhovskii S., Mirmelstein A. V., Piskunov Y. V., Germov A. Y., Potapov A., Gubkin A. F., Andreev A. V. 5f -electron magnetism in single crystal UN probed by N14 NMR // Physical Review B. 2021. Vol. 104. No. 15. 155148
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TY - JOUR
DO - 10.1103/PhysRevB.104.155148
UR - https://doi.org/10.1103%2FPhysRevB.104.155148
TI - 5f -electron magnetism in single crystal UN probed by N14 NMR
T2 - Physical Review B
AU - Ogloblichev, V. V.
AU - VERKHOVSKII, S. V.
AU - Mirmelstein, A. V.
AU - Piskunov, Y. V.
AU - Germov, A. Y.
AU - Potapov, Alexei
AU - Gubkin, A. F.
AU - Andreev, A. V.
AU - Verkhovskii, Stanislav
PY - 2021
DA - 2021/10/27 00:00:00
PB - American Physical Society (APS)
IS - 15
VL - 104
SN - 2469-9950
SN - 2469-9969
SN - 1098-0121
SN - 1550-235X
ER -
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@article{2021_Ogloblichev
author = {V. V. Ogloblichev and S. V. VERKHOVSKII and A. V. Mirmelstein and Y. V. Piskunov and A. Y. Germov and Alexei Potapov and A. F. Gubkin and A. V. Andreev and Stanislav Verkhovskii},
title = {5f -electron magnetism in single crystal UN probed by N14 NMR},
journal = {Physical Review B},
year = {2021},
volume = {104},
publisher = {American Physical Society (APS)},
month = {oct},
url = {https://doi.org/10.1103%2FPhysRevB.104.155148},
number = {15},
doi = {10.1103/PhysRevB.104.155148}
}
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