Journal ArticleDOI
Anisotropic Superexchange Interaction and Weak Ferromagnetism
TLDR
In this paper, the Anderson theory of superexchange was extended to include spin-orbit coupling and the antisymmetric spin coupling suggested by Dzialoshinski from purely symmetry grounds and the symmetric pseudodipolar interaction were derived.Abstract:
A theory of anisotropic superexchange interaction is developed by extending the Anderson theory of superexchange to include spin-orbit coupling. The antisymmetric spin coupling suggested by Dzialoshinski from purely symmetry grounds and the symmetric pseudodipolar interaction are derived. Their orders of magnitudes are estimated to be ($\frac{\ensuremath{\Delta}g}{g}$) and ${(\frac{\ensuremath{\Delta}g}{g})}^{2}$ times the isotropic superexchange energy, respectively. Higher order spin couplings are also discussed. As an example of antisymmetric spin coupling the case of Cu${\mathrm{Cl}}_{2}$\ifmmode\cdot\else\textperiodcentered\fi{}2${\mathrm{H}}_{2}$O is illustrated. In Cu${\mathrm{Cl}}_{2}$\ifmmode\cdot\else\textperiodcentered\fi{}2${\mathrm{H}}_{2}$O, a spin arrangement which is different from one accepted so far is proposed. This antisymmetric interaction is shown to be responsible for weak ferromagnetism in $\ensuremath{\alpha}$-${\mathrm{Fe}}_{2}$${\mathrm{O}}_{3}$, MnC${\mathrm{O}}_{3}$, and Cr${\mathrm{F}}_{3}$. The paramagnetic susceptibility perpendicular to the trigonal axis is expected to increase very sharply near the N\'eel temperature as the temperature is lowered, as was actually observed in Cr${\mathrm{F}}_{3}$.read more
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Journal ArticleDOI
Stabilization and current-induced motion of antiskyrmion in the presence of anisotropic Dzyaloshinskii-Moriya interaction
TL;DR: In this article, the antiskyrmion gyroconstant is shown to be opposite to that for skyrmions, which allows the current-driven propagation of coupled skyrmin-antiskyrmin pairs without an apparent skyrmnion Hall effect.
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Tailoring the Magnetic and Optical Characteristics of Nanocrystalline BiFeO3 by Ce Doping
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Ferromagnetism in multiferroic BiFeO 3 films: A first-principles-based study
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Robust Zero-Field Skyrmion Formation in FeGe Epitaxial Thin Films.
James C. Gallagher,Keng-Yuan Meng,Jack Brangham,Hailong Wang,Bryan D. Esser,Dave W. McComb,Fengyuan Yang +6 more
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Journal ArticleDOI
The Magnetic Genome of Two-Dimensional van der Waals Materials
Qing Hua Wang,Amilcar Bedoya-Pinto,Mark Blei,Avalon H. Dismukes,Assaf Hamo,Sarah N. M. Jenkins,Maciej Koperski,Yu Liu,Qi-Chao Sun,Evan J. Telford,Hyun Ho Kim,Mathias Augustin,Uri Vool,Jiaxin Yin,Lu Hua Li,Alexey Falin,Cory Dean,Fèlix Casanova,Richard Evans,Mairbek Chshiev,Artem Mishchenko,Cedomir Petrovic,Rui He,Liu-Bin Zhao,Adam W. Tsen,Brian D. Gerardot,Mauro Brotons-Gisbert,Zurab Guguchia,Xavier Roy,Sefaattin Tongay,Ziwei Wang,M. Z. Hasan,Joerg Wrachtrup,Amir Yacoby,Albert Fert,Stuart S. P. Parkin,Kostya S. Novoselov,Pengcheng Dai,Luis Balicas,Elton J. G. Santos +39 more
TL;DR: A comprehensive review of 2D magnetism can be found in this paper , where prominent authors with expertise in complementary fields of magnetism (i.e., synthesis, device engineering, magneto-optics, imaging, transport, mechanics, spin excitations, and theory and simulations) have joined together to provide a genome of current knowledge and a guideline for future developments in 2D magnetic materials research.