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An electric current flowing in Pt, a material with strong spin-orbit coupling, leads to spins accumulating at the interfaces by virtue of the spin Hall effect and interfacial charge-spin conversion. We measure the influence of these…

Spin currents can modify the magnetic state of ferromagnetic ultrathin films through spin-orbit torque. They may be generated by means of spin-orbit interaction by either bulk or interfacial phenomena. Electrical transport measurements…

介观与纳米尺度物理 · 物理学 2022-06-27 A. Anadón , R. Guerrero , J. A. Jover-Galtier , A. Gudín , J. M. Díez , P. Olleros-Rodríguez , R. Miranda , J. Camarero , P. Perna

Heterostructures consisting of a cuprate superconductor YBa2Cu3O7x and a ruthenate/manganite (SrRuO3/La0.7Sr0.3MnO3) spin valve have been studied by SQUID magnetometry, ferromagnetic resonances and neutron reflectometry. It was shown that…

The signature of magnetism without a ferromagnet in a non-magnetic heterostructure is novel as well as fascinating from fundamental research point of view. It has been shown by Al'Mari et al: that magnetism can be induced at the interface…

材料科学 · 物理学 2021-04-07 Purbasha Sharangi , Pierluigi Gargiani , Manuel Valvidares , Subhankar Bedanta

The spin-transfer effect has been studied in magnetic tunnel junctions (PtMn/CoFe/Ru/CoFe/Al2O3/CoFe/NiFe) with dimensions down to 0.1x0.2 um2 and resistance-area product RA in the range of 0.5-10 Ohm m2 (dR/R=1-20%). Current-induced…

其他凝聚态物理 · 物理学 2009-11-11 Yiming Huai , Frank Albert , Paul Nguyen , Mahendra Pakala , Thierry Valet

The spin Hall effect and its inverse are important spin-charge conversion mechanisms. The direct spin Hall effect induces a surface spin accumulation from a transverse charge current due to spin orbit coupling even in non-magnetic…

We present a detailed low-energy muon spin rotation and x-ray magnetic circular dichroism (XMCD) investigation of the magnetic structure in ultra-thin tetragonal (T)-CuO films. The measured muon-spin polarization decay indicates an…

Two-level fluctuations of the magnetization state of pseudo spin-valve pillars Co(10 nm)/Cu(10 nm)/Co(30 nm) embedded in electrodeposited nanowires (~40 nm in diameter, 6000 nm in length) are triggered by spin-polarized currents of 10^7…

介观与纳米尺度物理 · 物理学 2009-11-10 A. Fabian , C. Terrier , S. Serrano Guisan , X. Hoffer , M. Dubey , L. Gravier , J. -Ph. Ansermet , J. -E. Wegrowe

We consider ferromagnetic particles embedded into a superconductor and study the screening of their magnetic moments by the spins of the Cooper pairs in the superconductor. It is shown that a magnetic moment opposite to the one of the…

超导电性 · 物理学 2009-11-10 F. S. Bergeret , A. F. Volkov , K. B. Efetov

With x-ray absorption spectroscopy and polarized neutron reflectometry we studied how the magnetic proximity effect at the interface between the cuprate high-$T_C$ superconductor $\mathrm{YBa_2Cu_3O_7}$ (YBCO) and the ferromagnet…

Enhanced magnetic moment and coercivity in SrRuO3 thin films are significant issues for advanced technological usages and hence are researched extensively in recent times. Most of the previous reports on thin films with enhanced magnetic…

强关联电子 · 物理学 2020-06-24 Shekhar Tyagi , Gaurav Sharma , D. M. Phase , V. R. Reddy , V. G. Sathe

Using thin film pillars ~100 nm in diameter, containing two ferromagnetic Co layers of different thicknesses separated by a paramagnetic Cu spacer, we examine effects of torques due to spin-polarized currents flowing perpendicular to the…

介观与纳米尺度物理 · 物理学 2009-10-31 J. A. Katine , F. J. Albert , R. A. Buhrman , E. B. Myers , D. C. Ralph

In this work we investigate quantum transport in Cu nanowires created by bringing macroscopic Cu wires into and out of contact under an applied magnetic field in air. Here we show that a 70 % magneto-conductance effect can be seen in a Cu…

介观与纳米尺度物理 · 物理学 2009-11-10 D. M. Gillingham , C. Muller , J. A. C. Bland

Neutron Scattering measurements for YBa$_2$Cu$_3$O$_{6.6}$ have identified small magnetic moments that increase in strength as the temperature is reduced below $T^\ast$ and further increase below $T_c$. An analysis of the data shows the…

超导电性 · 物理学 2009-11-07 H. A. Mook , Pengcheng Dai , F. Dogan

Emergent ferromagnetism on the surface of recent two-dimensional (2D) MXene is investigated by X-ray magnetic circular dichroism (XMCD) and angle-dependent hard X-ray photoemission spectroscopy (HAXPES). Focusing on the Cr2N as one of the…

材料科学 · 物理学 2025-04-16 Prabhat Kumar , Shunsuke Tsuda , Koichiro Yaji , Shinji Isogami

Time-resolved X-ray microscopy is used to image the influence of alternating high-density currents on the magnetization dynamics of ferromagnetic vortices. Spin-torque induced vortex gyration is observed in micrometer-sized permalloy…

We performed depth-dependent low-energy muon spin spectroscopy ($\mu$SR) studies on three palladium 100 nm thin films, both undoped and doped with 170 ppm of iron. Muons implanted in the surface and substrate interface region probe an…

介观与纳米尺度物理 · 物理学 2022-09-07 Gesa Welker , Martin de Wit , Tjerk H. Oosterkamp , John A. Mydosh , Andreas Suter , Thomas Prokscha , Lucia Bossoni

Current-induced torques originating from earth-abundant 3d elements offer a promising avenue for low-cost and sustainable spintronic memory and logic applications. Recently, orbital currents -- transverse orbital angular momentum flow in…

材料科学 · 物理学 2025-02-03 Silvia Damerio , Can O. Avci

Superconducting magnetoelectric effect, which is the current-induced magnetization in a superconductor, mainly focused on the spin magnetization in previous studies, but ignore the effect of the orbital magnetic moments carried by the…

介观与纳米尺度物理 · 物理学 2021-07-14 Wen-Yu He , K. T. Law

We report time-resolved magneto-optic Kerr effect measurements of the longitudinal spin Seebeck effect driven by an interfacial temperature difference between itinerant electrons and magnons. The measured time-evolution of spin accumulation…

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