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
Temperature dependence of the Dzyaloshinskii-Moriya interaction in Pt/Co/Cu thin film heterostructures
TL;DR: In this article, the authors examined the temperature-dependent behavior of the Dzyaloshinskii-Moriya interaction (DMI) in Pt/Co/Cu thin-film heterostructures.
Journal ArticleDOI
Giant magnetic response of a two-dimensional antiferromagnet
Lin Hao,Derek Meyers,Hidemaro Suwa,Hidemaro Suwa,Junyi Yang,Clayton Frederick,Tamene R. Dasa,Gilberto Fabbris,Lukáš Horák,Dominik Kriegner,Dominik Kriegner,Yongseong Choi,Jong-Woo Kim,Daniel Haskel,Philip Ryan,Philip Ryan,Haixuan Xu,Cristian D. Batista,Cristian D. Batista,Mark Dean,Jian Liu +20 more
TL;DR: In this article, a superlattice consisting of SrIrO3 and SrTiO3 is shown to display a giant response to sub-tesla external magnetic fields by exploiting the extremely strong two-dimensional critical fluctuations preserved under a symmetry-invariant exchange anisotropy.
Journal ArticleDOI
Symmetry of anisotropic exchange interactions in semiconductor nanostructures
TL;DR: In this paper, the symmetry of exchange interaction of charge carriers in semiconductor nanostructures (quantum wells and quantum dots) was analyzed, and it was shown that the exchange Hamiltonian of two particles belonging to the same energy band can be universally expressed via pseudospin operators of the particles.
Journal ArticleDOI
Skyrmion motion driven by oscillating magnetic field.
Kyoung-Woong Moon,Duck-Ho Kim,Soong-Geun Je,Byong Sun Chun,Wondong Kim,Ziqiang Qiu,Sug-Bong Choe,Chanyong Hwang +7 more
TL;DR: In this paper, the authors show that a skyrmion of a few tens of nanometres can also be driven by high-frequency field oscillations, but with a different direction of motion from the in-plane component of the tilted oscillating field.
Journal ArticleDOI
Hybrid chiral domain walls and skyrmions in magnetic multilayers
William Legrand,Jean-Yves Chauleau,Davide Maccariello,Nicolas Reyren,Sophie Collin,Karim Bouzehouane,Nicolas Jaouen,Vincent Cros,Albert Fert +8 more
TL;DR: In this paper, the authors show how in such multilayered systems the interlayer interactions can actually lead to more complex, hybrid chiral magnetisation arrangements, and demonstrate a simple yet reliable method for determining the magnitude of the DMI from static domains measurements even in the presence of these hybrid chirality structures, by taking into account the actual profile of the DWs.