Magnetic Excitations in the Trimeric Compounds A3Cu3(PO4)4(A = Ca, Sr, Pb)

@article{Georgiev2019MagneticEI,
  title={Magnetic Excitations in the Trimeric Compounds A3Cu3(PO4)4(A = Ca, Sr, Pb)},
  author={M. Georgiev and Hassan Chamati},
  journal={arXiv: Atomic and Molecular Clusters},
  year={2019}
}
We study the magnetic excitations of the trimeric magnetic compounds A$_3$Cu$_3$(PO$_4$)$_4$ (A = Ca, Sr, Pb). The spectra are analyzed in terms of the Heisenberg model and a generic spin Hamiltonian that accounts for the changes in valence electrons distribution along the bonds among magnetic ions. The analytical results obtained in the framework of both Hamiltonians are compared to each other and to the available experimental measurements. The results based on our model show better agreement… 

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References

SHOWING 1-10 OF 31 REFERENCES

Magnetic excitations in the spin-trimer compounds Ca3Cu3- xNix(PO4)4 (x=0,1,2)

Inelastic neutron scattering experiments were performed for the spin-trimer compounds Ca3Cu3-xNix(PO4)4 (x=0,1,2) in order to study the dynamic magnetic properties. The observed excitations can be

Magnetic excitations in molecular magnets with complex bridges: the tetrahedral molecule Ni4Mo12

Abstract We investigate the spectroscopic magnetic excitations in molecular magnets with complex intermediate structure among the magnetic ions. Our approach consists in introducing a modified spin

Kondo response of a single antiferromagnetic chromium trimer.

It is found that Cr trimers can be reversibly switched between two distinct electronic states, consistent with noncollinear magnetic states predicted for Cr trimer whose structures differ by the position of a single atom.

Magnetic excitations from the linear Heisenberg antiferromagnetic spin trimer system A 3 Cu 3 ( P O 4 ) 4 ( A = Ca , Sr, and Pb)

Inelastic neutron-scattering experiments were performed on ${A}_{3}{\mathrm{Cu}}_{3}{(\mathrm{P}{\mathrm{O}}_{4})}_{4}$ ($A=\mathrm{Ca}$, Sr, and Pb), which consists of one-dimensional array of

Magnetic exchange in spin clusters

We investigate the role of exchange bridges in molecular magnets. We explore their effects on the distribution of the valence electrons and their contribution to the exchange processes. The present

Exchange-biased quantum tunnelling in a supramolecular dimer of single-molecule magnets

A supramolecular SMM dimer in which antiferromagnetic coupling between the two components results in quantum behaviour different from that of the individual SMMs, suggesting a means of tuning the quantum tunnelling of magnetization in SMMs.

NMR study of a magnetic phase transition in Ca 3 CuNi 2 (PO 4 ) 4 : A spin trimer compound

$^{31}\text{P}$ nuclear-magnetic-resonance (NMR) studies have been performed in trimer spin chain compound ${\text{Ca}}_{3}{\text{CuNi}}_{2}{({\text{PO}}_{4})}_{4}$, in the temperature range

Magnetic properties of the spin trimer compound Ca 3 Cu 2 Mg(PO 4 ) 4 from susceptibility measurements

No signature of the reduction in the net spin of the trimers was observed in the Cu2-Cu1-Mg trimers in the singlet ground state, which suggests that the type of trimers present in ${\text{Ca}}_{3}{\ text{Cu}}_{2}\text{Mg}{({-PO}}_{4})}_{4}$ are different.