Observation of two different oscillation periods in the exchange coupling of Fe/Cr/Fe(100)

Correlations of crystallographic defects and anisotropy with magnetotransport properties inFexTaS2single crystals (0.23≤x≤0.35)

“…4) and ρ(H) (Fig. 5), this behavior is absent in the x = 0.231 crystals while the magnetization and field-dependent resistivity are the same as those reported in the ferromagnetically inhomogeneous alloy Co 16 Cu 84 . 17 This implies that the magnetic moment in Fe 0.231 TaS 2 may be more Heisenberg-like instead of a simple Ising.…”

“…16 These antiparallel alignments mediated by the RKKY interaction were supported by the thickness dependence of the interplane coupling strength. 16 The concept of antiparallel alignment was later generalized to the misalignments of spins.…”

“…16 These antiparallel alignments mediated by the RKKY interaction were supported by the thickness dependence of the interplane coupling strength. 16 The concept of antiparallel alignment was later generalized to the misalignments of spins. 14,15 Although GMR was predominantly observed in two dimensional systems due to the increased interfacial scattering where the misalignment occurred, the same physics could take place in some 3D systems where ferromagnetic clusters were immersed in a non-magnetic matrix.…”

Direct observation of Cr spin polarization in epitaxial Cr/Co/Cr(100) trilayers

“…In the [100] growth direction Cr on Fe(100) first develops an atomic layerwise commensurate antiferromagnetic structure up to about 24 monolayers (MLs), after which it transforms to an incommensurate spin density wave (SDW) state. In Fe/Cr/Fe(100) trilayers and in Fe/Cr(001) superlattices a short period of two ML interlayer exchange coupling is observed, 7,8 and in addition a longer period comprising 12 MLs (=1.73 nm). 9 Due to some intermixing at the interface, the 2 ML AF oscillation starts with some delay of about 2-3 MLs.…”

“…All this has beautifully been demonstrated for Cr(001) grown on Fe whiskers and by imaging the domain structure via scanning electron microscopy with polarization analysis (SEMPA). 7 X-ray magnetic circular dichroism (XMCD) experiments at the resonant Cr L 3,2 edges showed that thin Cr films exhibit a ferromagnetic polarization with a magnetization direction opposite to the Fe magnetic moments. [10][11][12][13] These results confirm theoretical predictions of a ferromagnetic state of Cr at the Fe/Cr interface and an antiparallel spin alignment, but are off as concerns the magnitude of the predicted Cr magnetic moment, 14,15 which usually is overestimated by a factor of two to three as compared to experimental findings, which settle around 0.5-0.7 μ B .…”