scholarly journals Spin-Orbit-Entangled Nature of Magnetic Moments and Kitaev Magnetism in Layered Halides

2021 ◽  
Vol 30 (6) ◽  
pp. 191-194
Author(s):  
Heung-Sik Kim
Keyword(s):  
Magnetic Moments ◽  
Spin Orbit

scholarly journals Measuring the sense of the Dzyaloshinskii–Moriya interaction

2014 ◽  
Vol 70 (a1) ◽  
pp. C1350-C1350
Author(s):  
Vladimir Dmitrienko ◽  
Elena Ovchinnikova ◽  
Steve Collins ◽  
Gareth Nisbet ◽  
Guillaume Beutier ◽  
...  
Keyword(s):  
Local Density ◽  
Magnetic Moments ◽  
Resonant Scattering ◽  
Spin Orbit ◽  
Ministry Of Education ◽  
Multiple Diffraction ◽  
Dm Interaction ◽  
Antiferromagnetic Ordering ◽  
Theoretical Approaches ◽  
Grant Program

The spin-orbit Dzyaloshinskii–Moriya (DM) interaction EDM=D·[s1×s2] can induce small canting of neighboring magnetic moments s1 and s2. It is also very important for multiferroics and helimagnetic MnSi-type crystals with the spiral or Skyrmionic structures. The sense of the DM vector D has been experimentally determined for the first time in canted antiferromagnetic FeBO3 crystal [1]. The technique of interference between magnetic and resonant channels in synchrotron x-ray scattering was exploited. The phase of antiferromagnetic ordering (and scattering) was fixed by external magnetic field and the phase of resonant scattering was calculated with FDMNES program. Similar experiments have been also performed for MnCO3 and CoCO3 crystals. For Fe2O3 hematite crystal, the technique of interference between magnetic and multiple diffraction channels has been used. The experimental measurements are supported by ab initio calculations of the DM interaction. The first-principles calculations have been performed with Local Density Approximation incorporating the on-site Coulomb interaction U and the Spin-Orbit coupling (LDA+U+SO) [2,3]. It was found how DM interaction depends on displacements of oxygen atoms. These experimental and theoretical approaches open up new possibilities for exploring, modeling and exploiting novel magnetic and multiferroic materials. VED and ENO are grateful to the RFBR research project No. 13-02-00760 and to the project of Presidium of Russian Academy of Sciences No. 24. The work of VVM is supported by the grant program of President of Russian Federation MK-5565.2013.2, the contracts of the Ministry of education and science of Russia N 14.A18.21.0076 and 14.A18.21.0889. MIK acknowledges a financial support by FOM (The Netherlands).

scholarly journals Magnetic Properties of the Bismuth Oxide α — Bi2O3

1996 ◽  
Vol 51 (5-6) ◽  
pp. 665-666 ◽  
Author(s):  
A.I. Kharkovskii ◽  
V.l. Nizhankovskii ◽  
E. A. Kravchenko ◽  
V. G. Orlov
Keyword(s):  
Magnetic Properties ◽  
Bismuth Oxide ◽  
Magnetoelectric Effect ◽  
Magnetic Moments ◽  
Magnetic Behaviour ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Physical Origin ◽  
Wide Range ◽  
Electric Dipoles

Abstract A very unusual magnetic behaviour of α - Bi2O3 was observed in a wide range of temperatures and magnetic fields. A longitudinal magnetoelectric effect was found at 4.2 K. The existence of an antiferroelectrically ordered subsystem of electric dipoles in α - Bi2O3is proposed. The mechanism of spin-orbit coupling is regarded as the physical origin for the occurrence of the ordered magnetic moments in α - Bi2O3.

Single-Crystal Synthesis

2021 ◽  
pp. 161-178
Author(s):  
Gang Cao ◽  
Lance E. DeLong
Keyword(s):  
Crystal Growth ◽  
Transition Metal ◽  
Metal Oxides ◽  
Single Crystals ◽  
Crystal Structures ◽  
Transition Metal Oxides ◽  
Magnetic Moments ◽  
Spin Orbit ◽  
Spin Orbit Interactions ◽  
Almost All

Growing single crystals of 4d- and 5d-transition metal oxides is often difficult, as they tend to form incongruently, as well as having high vapor pressure and high melting points. Two crystal growth techniques are commonly used for transition metal oxides—flux and floating-zone techniques; each has advantages and disadvantages. An established capability in both techniques makes it possible to grow single crystals of almost all stable materials. Some basic aspects of both techniques are discussed, and a few general remarks on crystal growth of 4d- and 5d-transition metal oxides are presented. Crystal structures of most 4d- and 5d-transition metal oxides are inherently distorted. An innovative “field-altering” technique is under development, in which an applied magnetic field aligns magnetic moments and, through strong spin-orbit interactions and magnetoelastic coupling, alters crystal structures at high temperatures. Preliminary results show that a field-altering technology is highly effective for resolving physical properties of spin-orbit-coupled oxides.

Magnetism in olivine-type LiCo1−xFexPO4cathode materials: bridging theory and experiment

2015 ◽  
Vol 17 (46) ◽  
pp. 31202-31215 ◽  
Author(s):  
Vijay Singh ◽  
Yelena Gershinsky ◽  
Monica Kosa ◽  
Mudit Dixit ◽  
David Zitoun ◽  
...  
Keyword(s):  
First Principles ◽  
Qualitative Agreement ◽  
Magnetic Moments ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
First Principles Calculations ◽  
Theory And Experiment

This work demonstrates that inclusion of spin–orbit coupling in first-principles calculations is essential to obtain qualitative agreement with the observed effective magnetic moments in LiCo1−xFexPO4.

scholarly journals Dirac Phenomenology and Hyperon-Nucleus Interactions*)

1994 ◽  
Vol 117 ◽  
pp. 415-433 ◽  
Author(s):  
J. MareŠ ◽  
B. K. Jennings ◽  
E. D. Cooper
Keyword(s):  
Optical Potential ◽  
Magnetic Moments ◽  
Mean Field Theory ◽  
Mean Field ◽  
Decay Rates ◽  
Spin Orbit ◽  
Tensor Coupling ◽  
Relativistic Mean Field ◽  
Mesonic Decay ◽  
Dirac Phenomenology

We discuss various aspects of hyperon-nucleus interactions in the relativistic mean field theory. First, characteristics of Λ, Σ and Ξ hypernuclei, as well as multi-strange baryonic objects, are investigated. The spin-orbit splittings and magnetic moments are shown to be very sensitive to the value of the tensor coupling fωY. Second, optical potentials for Λ and Σ scattering off nuclei are developed based on a global nucleon-nucleus Dirac optical potential and SU(3) symmetry. The tensor coupling has a large effect on the predictions for the analyzing power. Third, the Dirac approach is used in the calculations of the non-mesonic decay of Λ hypernuclei. The large discrepancy between the decay rates and data suggests the need for additional meson exchanges.

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