Fig. 3: ESR of \([{{\rm{Ni}}}(p-{{\rm{Py}}}-{{\rm{V}}}-p-{{\rm{F}}}){({{{\rm{H}}}}_{2}{{\rm{O}}})}_{5}]\cdot 2{{{\rm{NO}}}}_{3}\).
From: Emergence of Kondo-assisted Néel order in a Kondo necklace model
![Fig. 3: ESR of
$$[{{\rm{Ni}}}(p-{{\rm{Py}}}-{{\rm{V}}}-p-{{\rm{F}}}){({{{\rm{H}}}}_{2}{{\rm{O}}})}_{5}]\cdot 2{{{\rm{NO}}}}_{3}$$
[
Ni
(
p
−
Py
−
V
−
p
−
F
)
(
H
2
O
)
5
]
⋅
2
NO
3
.](http://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs43246-025-01027-3/MediaObjects/43246_2025_1027_Fig3_HTML.png?as=webp)
a Frequency dependence of ESR absorption spectra of \([{{\rm{Ni}}}(p-{{\rm{Py}}}-{{\rm{V}}}-p-{{\rm{F}}}){({{{\rm{H}}}}_{2}{{\rm{O}}})}_{5}]\cdot 2{{{\rm{NO}}}}_{3}\) at 1.8 K. The arrows indicate the resonance fields. b Frequency-field plot of the resonance fields. Solid lines indicate the calculated resonance modes of the spin-1 monomer along the principal axes, obtained using an on-site anisotropy of D/kB = − 1.2 K and g-values of gx = 2.20, gy = 2.25, and gz = 2.34. c Calculated energy branch of the the spin-1 monomer for H//z, H//x and H//y. Those for H//x and H//y are qualitatively equivalent. Arrows indicate spin-allowed transitions from the ground state, which correspond to the resonance modes.
