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The orbital and spin moment of the Ni2+ ion in NiO has been calculated within the quasi-atomic approach. The orbital moment of 0.54 mB amounts at 0 K, in the magnetically-ordered state, to more than 20% of the total moment (2.53 mB). For…

Strongly Correlated Electrons · Physics 2007-05-23 R. J. Radwanski , Z. Ropka , R. Michalski

The total, orbital and spin moment of the Co2+ ion in CoO has been calculated within the quasi-atomic approach with taking into account strong correlations, crystal-field interactions and the intra-atomic spin-orbit coupling. The orbital…

Strongly Correlated Electrons · Physics 2009-11-10 R. J. Radwanski , Z. Ropka

The orbital and spin moment of the Co2+ ion in CoO has been calculated within the quasi-atomic approach with taking into account the intra-atomic spin-orbit coupling. The orbital moment of 1.38 \mu_{B} amounts at 0 K, in the…

Strongly Correlated Electrons · Physics 2007-05-23 R. J. Radwanski , Z. Ropka

We have calculated magnetic properties and the electronic structure of NiO both in the paramagnetic and in magnetically-ordered state as well as zero-temperature properties and thermodynamics within the strongly-correlated crystal-field…

Strongly Correlated Electrons · Physics 2008-10-08 R. J. Radwanski , Z. Ropka

The orbital and spin moment of the Co2+ ion in CoO has been calculated within the quasi-atomic approach with taking into account the intra-atomic spin-orbit coupling and crystal field interactions. The orbital moment of 1.38 m_B amounts at…

Strongly Correlated Electrons · Physics 2007-05-23 R. J. Radwanski , Z. Ropka

The orbital and spin moment of the Ni2+ ion in NiO has been calculated at 0 K to be 0.54mB and 1.99 mB respectively. Such large orbital moment, more than 20% of the total moment of 2.53 mB, proves the need for the ''unquenching'' of the…

Strongly Correlated Electrons · Physics 2023-06-21 R. J. Radwanski , Z. Ropka

We claim that any approach neglecting the spin-orbit coupling and the orbital magnetism is not physically adequate for 3d oxides, including NiO, and that in reaching "excellent agreement" in a Phys. Rev. Lett. 93, 126406 (2004) paper too…

Strongly Correlated Electrons · Physics 2008-10-08 R. J. Radwanski , Z. Ropka

Magnetic properties of NiO are investigated by incorporating the spin-orbit interaction in the LSDA+U scheme. It is found that the large part of orbital moment remains unquenched in NiO. The orbital moment contributes about mu_L = 0.29 mu_B…

Strongly Correlated Electrons · Physics 2009-10-31 S. K. Kwon , B. I. Min

Magnetic moment of the Fe2+ ion in FeO, FeS and FeBr2 has been calculated within the quantum atomistic solid-state theory to substantially exceed a value of 4 muB in the magnetically-ordered state at 0 K. In all compounds the large orbital…

Strongly Correlated Electrons · Physics 2007-05-23 R. J. Radwanski , Z. Ropka

Magnetic moment of the Fe2+ ion in FeBr2 has been calculated to be 4.32 mB in the magnetically-ordered state at 0 K. It is composed from the spin moment of 3.52 mB and the orbital moment of +0.80 mB. These calculations show that for the…

Strongly Correlated Electrons · Physics 2007-05-23 Z. Ropka , R. Michalski , R. J. Radwanski

We have calculated the discrete low-energy electronic structure in LaMnO3 originating from the atomic-like states of the strongly correlated 3d4 electronic system occurring in the Mn3+ ion. We take into account very strong intra-atomic…

Strongly Correlated Electrons · Physics 2009-11-10 R. J. Radwanski , Z. Ropka

The size dependent electronic structure and separate spin and orbital magnetic moments of free Co$_n^+$ ($n = 4\;\textrm{-}\;9$) cluster ions have been investigated by x-ray absorption and x-ray magnetic circular dichroism spectroscopy in a…

Atomic and Molecular Clusters · Physics 2019-10-30 V Zamudio-Bayer , K Hirsch , A Langenberg , A Ławicki , A Terasaki , B von Issendorff , J T Lau

Spin and orbital magnetic moments of cationic iron, cobalt, and nickel clusters have been determined from x-ray magnetic circular dichroism spectroscopy. In the size regime of $n = 10 - 15$ atoms, these clusters show strong ferromagnetism…

Atomic and Molecular Clusters · Physics 2014-12-01 A. Langenberg , K. Hirsch , A. Lawicki , V. Zamudio-Bayer , M. Niemeyer , P. Chmiela , B. Langbehn , A. Terasaki , B. v. Issendorff , J. T. Lau

Magnetic properties of stechiometric YTiO3 has been calculated within the single-ion-based paradigm taking into account the low-symmetry crystal field and the intra-atomic spin-orbit coupling of the Ti3+ ion. Despite of the very simplified…

Strongly Correlated Electrons · Physics 2008-10-08 R. J. Radwanski , Z. Ropka

In this contribution we derive and discuss energy levels of the strongly-correlated d2 configuration of the V3+ ion (LaVO3) and of d4 configuration of the Mn3+ ion (LaMnO3) in the octahedral surroundings in the presence of the spin-orbit…

Strongly Correlated Electrons · Physics 2007-05-23 R. J. Radwanski Z. Ropka

The electronic ground state of Ca3LiOsO6 was recently considered within an intermediate coupling regime that revealed J=3/2 spin-orbit entangled magnetic moments. Through inelastic neutron scattering and density functional theory we…

Strongly Correlated Electrons · Physics 2017-11-29 S. Calder , D. J. Singh , V. O. Garlea , M. D. Lumsden , Y. G. Shi , K. Yamaura , A. D. Christianson

We have studied the electronic structure of BaCoO$_3$ using soft x-ray absorption spectroscopy at the Co-$L_{2,3}$ and O-$K$ edges, magnetic circular dichroism at the Co-$L_{2,3}$ edges, as well as valence band hard x-ray photoelectron…

We claim the existence of the f3 (U3+) configuration in UPd2Al3. It is in agreement with inelastic-neutron-scattering (INS) excitations and is consistent with the trivalent neptunium configuration in NpPd2Al3. We have derived set of CEF…

Strongly Correlated Electrons · Physics 2015-06-24 R. J. Radwanski , Z. Ropka

We point out that the orbital magnetism has to be taken into account in the description of real 3d-ion compounds. According to the developed by us the Quantum-Atomistic Solid-State (QUASST) theory in compounds containing open…

Strongly Correlated Electrons · Physics 2008-10-08 R. J. Radwanski , Z. Ropka

SmN is ferromagnetic below 27 K, and its net magnetic moment of 0.03 Bohr magnetons per formula unit is one of the smallest magnetisations found in any ferromagnetic material. The near-zero moment is a result of the nearly equal and…

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