Enhanced magneto-optical Kerr effect in spontaneously ordered FePt alloys: Quantitative agreement between theory and experiment

Cebollada, A.; Weller, D.; Sticht, J.; Harp, G. R.; Farrow, R. F. C.; Marks, R. F.; Savoy, R.; Scott, J. C.

doi:10.1103/physrevb.50.3419

Cited by 345 publications

(150 citation statements)

References 14 publications

Supporting

Mentioning

143

Contrasting

Order By: Relevance

“…Up to now, very few experiments have been performed on tailored ferromagnetic/semiconductor heterostructures in a remanent state characterized by a spontaneous out-of-plane magnetization. This property can be provided by 3d/4d or 3d/5d ordered alloys in the fcc L1 0 cubic phase presenting alternate planes of magnetic and nonmagnetic atoms, as in CoPt(001), 37,38 FePt(001), 39 and FePd(001) (Ref. 40) compounds, or in 3d/4d or 3d/5d superlattices as in the cases of Co/Pd (Refs.…”

Section: Introductionmentioning

confidence: 99%

Spin injection at remanence into III-V spin light-emitting diodes using (Co/Pt) ferromagnetic injectors

et al. 2012

View full text Add to dashboard Cite

We have studied the perpendicular magnetic anisotropy of Co/Pt multilayers and the electron spin injection efficiency by optical spectroscopy from a [Co(0.6 nm)/Pt(1 nm)] 4 /Fe(0.3 nm)/MgO perpendicular tunnel spin injector grown on AlGaAs/GaAs semiconductor light-emitting diodes. We observe a 2.5% circular polarization at low temperature close to the magnetic remanence when the 0.3 nm Fe film of the ferromagnetic injector is sufficiently thin to maintain the magnetization out of plane. The acquired squared magnetization cycle is explained by the remaining interlayer exchange coupling existing between Fe and the (Co/Pt) multilayer through Pt or possible perpendicular magnetic anisotropy at the MgO/Fe interface. The corresponding spin polarization of the current is then estimated as 7%, measured by photoluminescence techniques, after the necessary uprenormalization, taking into account the electron spin-flip rate in the quantum well. In contrast, no circular polarization is observed when the thin Fe layer is removed and despite the rather high magnetic polarizability of the 5d 9 electronic open shell of Pt at the interface with MgO. This emphasizes the reduced size of tunneling branching of wave functions at the interface, of the order of the atomic plane unit.

show abstract

Section: Introductionmentioning

confidence: 99%

Spin injection at remanence into III-V spin light-emitting diodes using (Co/Pt) ferromagnetic injectors

et al. 2012

View full text Add to dashboard Cite

show abstract

“…These materials are currently under investigation with respect to possible spintronic applications due to their large uniaxial magnetic anisotropy energies and high Kerr rotation, making them possible candidates for ultrahigh density magnetic and magnetooptical recording media. 27 Recently, the AHE in FePt was used for injection of a spin-polarized current for consequent detection of direct and inverse spin Hall effect in Au. 28 In a combined experimental and theoretical study, 29 it was shown that the intrinsic contribution to the anomalous Hall signal dominates in samples of FePt with finite structural disorder.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic intrinsic anomalous Hall effect in ordered3dPt alloys

2011

View full text Add to dashboard Cite

By performing first-principles calculations, we investigate the intrinsic anomalous Hall conductivity (AHC) and its anisotropy in ordered L1 0 FePt, CoPt, and NiPt ferromagnets and their intermediate alloys. We demonstrate that the AHC in this family of compounds depends strongly on the direction of the magnetization M in the crystal. We predict that such pronounced orientational dependence in combination with the general decreasing trend of the AHC when going from FePt to NiPt leads to a sign change of the AHC upon rotating the magnetization direction in the crystal of CoPt alloy. We also suggest that, for a range of concentration x in Co x Ni 1−x Pt and Fe x Co 1−x Pt alloys, it is possible to achieve a complete quenching of the anomalous Hall current for a certain direction of the magnetization in the crystal. By analyzing the spin-resolved AHC in 3dPt alloys, we endeavor to relate the overall trend of the AHC in these compounds to the changes in their densities of d states around the Fermi energy upon varying the atomic number. Moreover, we show the generality of the phenomenon of anisotropic anomalous Hall effect by demonstrating its occurrence within the three-band tight-binding model.

show abstract

“…The growth of FePt thin films on MgO(100) results in the AuCu(I) crystal structure which has an extremely high magnetocrystalline anisotropy [1,2]. In view of technological applications for magnetic recording media, the need exists to (1313) control the direction of the easy magnetization axis.…”

Section: Introductionmentioning

confidence: 99%

Determination of the Direction of the c-Axis of L1₀FePt Thin Films with the MÖssbauer Spectroscopy

et al. 2007

View full text Add to dashboard Cite

The continued growth of storage capacity requires new innovations in recording media and in particular, in magnetic nanostructures. FePt thin films in the L10-phase are interesting candidates for high-density magnetic recording media due to their large magnetocrystalline anisotropy. In the present work, we investigated the magnetic and structural properties of FePt thin films directly grown on MgO(110) with molecular beam epitaxy. The purpose was to gain insight in the correlation between the magnetization process and the morphology of the FePt thin films. We introduce conversion electron Mössbauer spectroscopy to derive the direction of the easy magnetization axis with respect to the substrate. The results are compared to the characterization performed with high angle X-ray diffraction.

show abstract

Enhanced magneto-optical Kerr effect in spontaneously ordered FePt alloys: Quantitative agreement between theory and experiment

Cited by 345 publications

References 14 publications

Spin injection at remanence into III-V spin light-emitting diodes using (Co/Pt) ferromagnetic injectors

Spin injection at remanence into III-V spin light-emitting diodes using (Co/Pt) ferromagnetic injectors

Anisotropic intrinsic anomalous Hall effect in ordered3dPt alloys

Determination of the Direction of the c-Axis of L1₀FePt Thin Films with the MÖssbauer Spectroscopy

Contact Info

Product

Resources

About

Enhanced magneto-optical Kerr effect in spontaneously ordered FePt alloys: Quantitative agreement between theory and experiment

Cited by 345 publications

References 14 publications

Spin injection at remanence into III-V spin light-emitting diodes using (Co/Pt) ferromagnetic injectors

Spin injection at remanence into III-V spin light-emitting diodes using (Co/Pt) ferromagnetic injectors

Anisotropic intrinsic anomalous Hall effect in ordered3dPt alloys

Determination of the Direction of the c-Axis of L10FePt Thin Films with the MÖssbauer Spectroscopy

Contact Info

Product

Resources

About

Determination of the Direction of the c-Axis of L1₀FePt Thin Films with the MÖssbauer Spectroscopy