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- W2000436284 abstract "NMR spectra of $^{19}mathrm{F}$ and $^{61}mathrm{Ni}$ have been obtained at 4.2 ifmmode^circelsetextdegreefi{}K, in zero external field, by a spinecho study of hexagonal ferrimagnetic RbNi${mathrm{F}}_{3}$. The two inequivalent F sites yield broad spectra, strongly peaked at the extremes, characteristic of random magnetization orientations confined to the $c$ plane. The extremes of the higher-frequency $h$-site spectrum occur at 103 ifmmodepmelsetextpmfi{} 1 and 227 ifmmodepmelsetextpmfi{} 1 MHz; of the lower-frequency $k$ site, at 5.7 ifmmodepmelsetextpmfi{} 0.2 and 19.6 ifmmodepmelsetextpmfi{} 0.2 MHz. Comparison of the F hyperfine coupling constants indicates that at 4.2 ifmmode^circelsetextdegreefi{}K both the isotropic and pseudodipolar parts are reduced by roughly 10% with respect to the room-temperature values obtained by Smolenskii et al. for the paramagnetic phase. The $^{61}mathrm{Ni}$ spectra are sharp quadrupole triplets, with the center frequency of the more populous $f$ site of 17.06 ifmmodepmelsetextpmfi{} 0.01, of the $a$ site at 18.30 ifmmodepmelsetextpmfi{} 0.01 MHz, in agreement with expectation for ${mathrm{Ni}}^{2+}$ ions. The quadrupole splitting parameters $frac{{e}^{2}mathrm{qQ}}{h}$ are 1.54 and 0.68 MHz, respectively." @default.
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- W2000436284 date "1970-11-01" @default.
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- W2000436284 title "Zero-Field Nuclear Magnetic Resonance of Ordered RbNiF3" @default.
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- W2000436284 doi "https://doi.org/10.1103/physrevb.2.3472" @default.
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