Disentangling orbital and spin exchange interactions for Co2+ on a rocksalt lattice

@article{Sarte2018DisentanglingOA,
  title={Disentangling orbital and spin exchange interactions for 
Co2+
 on a rocksalt lattice},
  author={P M Sarte and Roger Arthur Cowley and Efrain E. Rodriguez and E. Pachoud and Duc-Anh Le and V Garc{\'i}a-Sakai and J. W. Taylor and Christopher D. Frost and Dharmalingam Prabhakaran and Chris MacEwen and Atsushi Kitada and Alexander J. Browne and M Songvilay and Zahra Yamani and William J. L. Buyers and John Paul Attfield and Christopher Stock},
  journal={Physical Review B},
  year={2018}
}
Neutron spectroscopy was applied to study the magnetic interactions of orbitally degenerate Co2+ on a host MgO rocksalt lattice where no long-range spin or orbital order exists. The paramagnetic nature of the substituted monoxide Co0.03Mg0.97O allows for the disentanglement of spin exchange and spin-orbit interactions. By considering the prevalent excitations from Co2+ spin pairs, we extract seven exchange constants out to the fourth coordination shell. An antiferromagnetic next-nearest… 

Figures and Tables from this paper

Spin-orbit excitons in CoO
CoO has an odd number of electrons in its unit cell, and therefore is expected to be metallic. Yet, CoO is strongly insulating owing to significant electronic correlations, thus classifying it as a
Ordered magnetism in the intrinsically decorated jeff=12α−CoV3O8
The antiferromagnetic mixed valence ternary oxide $\alpha$-CoV$_{3}$O$_{8}$ displays disorder on the Co$^{2+}$ site that is inherent to the $Ibam$ space group. The zero field structural and dynamic
Synthesis and characterization of ZnS-based quantum dots to trace low concentration of ammonia
In the present work, a solution-based co-precipitation method has been adopted to synthesize pure and cobalt-doped ZnS quantum dots and characterized by XRD, SEM, TEM with EDX, FTIR and gas sensing
Magnetic fluctuations and the spin-orbit interaction in Mott insulating CoO.
TLDR
The story of CoO is of one that has come full circle, one filled with both spectacular failures and intermittent, yet profound, little victories.
Metastable and localized Ising magnetism in α−CoV2O6 magnetization plateaus
$\alpha$-CoV$_{2}$O$_{6}$ consists of $j_{\mathrm{eff}}={1 \over 2}$ Ising spins located on an anisotropic triangular motif with magnetization plateaus in an applied field. We combine neutron
Van Vleck excitons in Ca2RuO4
A framework is presented for modeling and understanding magnetic excitations in localized, intermediate coupling magnets where the interplay between spin-orbit coupling, magnetic exchange, and

References

SHOWING 1-10 OF 104 REFERENCES
Interplay between Magnetic and Orbital Ordering in the Strongly Correlated Cobalt Oxide: A DFT + U Study
The strongly correlated CoO is investigated by means of DFT + U calculations to elucidate the origin of the cubic-to-monoclinic distortion observed below TN for that system. An effective Ueff value
Theory of the Magnetic Properties of Ferrous and Cobaltous Oxides, II
The magnetic properties of antiferromagnetics, FeO and CoO, are investigated from the standpoint of the one-ion approximation. In their crystalline field of cubic symmetry the orbital degeneracies of
Extraction of exchange parameters in transition-metal perovskites
When extracting exchange parameters from measured spin-wave dispersion relations there are severe limitations particularly for magnetic compounds such as the transition-metal perovskites, where the
Exchange coupling in transition metal monoxides: Electronic structure calculations
An ab initio study of magnetic-exchange interactions in antiferromagnetic and strongly correlated 3d transition metal monoxides is presented. Their electronic structure is calculated using the local
Origin of antiferromagnetism in CoO: A density functional theory study
We have investigated the origin of antiferromagnetism of CoO in the rocksalt structure using spin-polarized density functional theory calculations. We find that in the rocksalt structure, the
Magnetic excitations of spin and orbital moments in cobalt oxide
Magnetic and phonon excitations in the antiferromagnet CoO with an unquenched orbital angular momentum are studied by neutron scattering. Results of energy scans in several Brillouin zones in the
Susceptibility and Antiferromagnetic Resonance in Cobaltous Oxide
The magnetic susceptibility and antiferromagnetic resonance of CoO are studied on the basis of Kanamori's theory, in which the residual orbital angular momentum plays an important role in the
Singlet-triplet dispersion reveals additional frustration in the triangular-lattice dimer compound Ba3Mn2O8.
TLDR
Single crystal inelastic neutron scattering measurements of the S=1 dimerized quasi-two-dimensional antiferromagnet Ba(3)Mn(2)O(8) are presented and the obtained exchange values are able to reproduce the four critical fields in the phase diagram.
Magnetic structure and dynamics of surface-spin systems of the 3d transition metal monoxides studied by metastable helium beam scattering
The application of diffractive and inelastic surface scattering of coherent 23S metastable helium beams (He*) to study the physics of surface antiferromagnetic (AFM) properties of insulators, in
...
1
2
3
4
5
...