Static magnetic proximity effect in Pt/Ni${}_{1-x}$Fe${}_x$ bilayers investigated by x-ray resonant magnetic reflectivity

Abstract

We present x-ray resonant magnetic reflectivity (XRMR) as a very sensitive tool to detect proximity induced interface spin polarization in Pt/Fe, Pt/Ni${}_{33}$Fe${}_{67}$, Pt/Ni${}_{81}$Fe${}_{19}$ (permalloy), and Pt/Ni bilayers. We demonstrate that a detailed analysis of the reflected x-ray intensity gives insight in the spatial distribution of the spin polarization of a non-magnetic metal across the interface to a ferromagnetic layer. The evaluation of the experimental results with simulations based on optical data from ab initio calculations provides the induced magnetic moment per Pt atom in the spin polarized volume adjacent to the ferromagnet. We find the largest spin polarization in Pt/Fe and a much smaller magnetic proximity effect in Pt/Ni. Additional XRMR experiments with varying photon energy are in good agreement with the theoretical predictions for the energy dependence of the magnetooptic parameters and allow identifying the optical dispersion $\delta$ and absorption $\beta$ across the Pt L3-absorption edge.

References in corpus (10)

• Theory of spin Hall magnetoresistance
• Quantitative study of the spin Hall magnetoresistance in ferromagnetic insulator/normal metal hybrids
• Scaling behavior of the spin pumping effect in ferromagnet/platinum bilayers
• Investigation of induced Pt magnetic polarization in Pt/Y3Fe5O12 bilayers
• Transverse spin Seebeck vs. Anomalous and Planar Nernst Effects in Permalloy Thin Films
• Longitudinal spin Seebeck effect contribution in transverse spin Seebeck effect experiments in Pt/YIG and Pt/NFO
• Static magnetic proximity effect in Pt/NiFe2O4 and Pt/Fe bilayers investigated by x-ray resonant magnetic reflectivity
• Physical characteristics and cation distribution of NiFe2O4 thin films with high resistivity prepared by reactive co-sputtering
• Influence of heat flow directions on Nernst effects in Py/Pt bilayers
• Temperature Dependence of Spin Hall Angle of Palladium

Cited by in corpus (17)

• Interface-Induced Phenomena in Magnetism
• Quantitative disentanglement of spin Seebeck, proximity-induced and intrinsic anomalous Nernst effect in NM/FM bilayers
• Enhancement of anomalous Nernst effect in Ni/Pt superlattice
• Threshold Interface Magnetization Required to Induce Magnetic Proximity Effect
• Asymmetric modification of the magnetic proximity effect in Pt/Co/Pt trilayers by the insertion of a Ta buffer layer
• Interface-induced anomalous Nernst effect in Fe3O4/Pt-based heterostructures
• Suppression of the fieldlike spin-orbit torque efficiency due to the magnetic proximity effect in ferromagnet/platinum bilayers
• Tunable pure spin supercurrents and the demonstration of a superconducting spin-wave device
• Static Magnetic Proximity Effect in Pt Layers on Sputter-Deposited NiFe2O4 and on Fe of Various Thicknesses Investigated by XRMR
• Impact of the magnetic proximity effect in Pt on the total magnetic moment of Pt/Co/Ta trilayers studied by x-ray resonant magnetic reflectivity
• Spin Seebeck effect and magnon diffusion length in ${\mathbf{Fe}}_3{\mathbf{O}}_4$
• Static magnetic proximity effects and spin Hall magnetoresistance in Pt/Y${}_3$Fe${}_5$O${}_{12}$ and inverted Y${}_3$Fe${}_5$O${}_{12}$/Pt bilayers
• Advanced data analysis procedure for hard x-ray resonant magnetic reflectivity discussed for Pt thin film samples of various complexity
• Cation- and lattice-site-selective magnetic depth profiles of ultrathin $\mathrm{F}{\mathrm{e}}_3{\mathrm{O}}_4$(001) films
• Quantitative comparison of the magnetic proximity effect in Pt detected by XRMR and XMCD
• Co-sputtered PtMnSb thin films and PtMnSb/Pt bilayers for spin-orbit torque investigations
• Structural and magnetic investigation of the interfaces of $\mathrm{F}{\mathrm{e}}_3{\mathrm{O}}_4/MgO(001)$ with and without NiO interlayer