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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Probing magnetic excitations and correlations in single and coupled spin systems with scanning tunneling spectroscopy
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Magnetic ordering and anisotropy in heavy atom radicals.
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Helical magnetic structure and the anomalous and topological Hall effects in epitaxial B20 Fe1-yCoyGe films
Charles S. Spencer,Jacob Gayles,Jacob Gayles,N. A. Porter,Satoshi Sugimoto,Zabeada Aslam,Christian J. Kinane,Timothy Charlton,Frank Freimuth,Stanislav Chadov,Sean Langridge,Jairo Sinova,Claudia Felser,Stefan Blügel,Yuriy Mokrousov,Yuriy Mokrousov,Christopher H. Marrows +16 more
TL;DR: In this paper, the authors measured the longitudinal and Hall resistivities of the B20-structure compound Fe1−yCoyGe and showed that the Hall resistivity is expected to contain contributions from the ordinary, anomalous, and topological Hall effects.
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Modulation of Heavy Metal/Ferromagnetic Metal Interface for High-Performance Spintronic Devices
Shouzhong Peng,Daoqian Zhu,Jiaqi Zhou,Boyu Zhang,Anni Cao,Mengxing Wang,Wenlong Cai,Kaihua Cao,Weisheng Zhao +8 more
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Theory of skyrmions in bilayer systems
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