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Epitaxial Y3Fe5O12 thin films have been deposited by off-axis sputtering, which exhibit excellent crystalline quality, enabling observation of large spin pumping signals in Pt/Y3Fe5O12 and W/Y3Fe5O12 bilayers driven by cavity ferromagnetic…

材料科学 · 物理学 2014-05-20 H. L. Wang , C. H. Du , Y. Pu , R. Adur , P. C. Hammel , F. Y. Yang

We present a novel method to image spin properties of spintronic systems using the spatially confined field of a scanned micromagnetic probe, in conjunction with existing electrical or optical global spin detection schemes. It is thus…

介观与纳米尺度物理 · 物理学 2011-01-18 V. P. Bhallamudi , A. J. Berger , D. E. Labanowski , D. Stroud , P. C. Hammel

In the normal metal/ferromagnetic insulator bilayer (such as Pt/Y$_{3}$Fe$_{5}$O$_{12}$) and the normal metal/ferromagnetic metal/oxide trilayer (such as Pt/Co/AlO$_{x}$) where spin injection and ejection are achieved by the spin Hall…

介观与纳米尺度物理 · 物理学 2015-11-24 Wei Chen , Manfred Sigrist , Jairo Sinova , Dirk Manske

The competition between intrinsic spin-orbit physics, magnetic phenomena, and the quality of materials and interfaces governs the charge-to-spin conversion processes that are essential to the implementation of spintronic devices. Direct…

Several different experimental techniques have been used in efforts to measure the spin Hall conductivity and the spin Hall angle in Pt samples at room temperature, with results that disagree by more than a factor of 20, with spin Hall…

介观与纳米尺度物理 · 物理学 2012-03-07 Luqiao Liu , R. A. Buhrman , D. C. Ralph

Alkali-metal optically-pumped magnetometers are prone to inaccuracies arising from the overlap of the average F = I + 1/2 and F = I - 1/2 ground-state Zeeman resonances. We employ density-matrix simulations and experiments to investigate…

原子物理 · 物理学 2025-03-17 D. P. Hewatt , M. Ellmeier , C. Kiehl , T. S. Menon , J. W. Pollock , C. A. Regal , S. Knappe

Periodic excitation of electron spin polarization by consecutive laser pulses in phase with Larmor spin precession about a magnetic field results in resonant spin amplification (RSA). We observe a drastic modification of RSA in $n$-doped…

介观与纳米尺度物理 · 物理学 2020-08-05 V. V. Belykh , D. N. Sob'yanin , A. R. Korotneva

We develop a theory of spin noise spectroscopy of itinerant, noninteracting, spin-carrying fermions in different regimes of temperature and disorder. We use kinetic equations for the density matrix in spin variables. We find a general…

统计力学 · 物理学 2015-05-14 Simon Kos , Alexander V. Balatsky , Peter B. Littlewood , Darryl L. Smith

We experimentally observe nonlinear spin torque in metallic bilayers of platinum and permalloy by means of spin-torque ferromagnetic-resonance (ST-FMR) under massive dc current injection. The observed nonlinear spin torque exerted to…

介观与纳米尺度物理 · 物理学 2024-06-18 Toshiyuki Kodama , Nobuaki Kikuchi , Takahiro Chiba , Satoshi Okamoto , Seigo Ohno , Satoshi Tomita

We review the problem of spin decoherence of magnetic atoms deposited on a surface. Recent breakthroughs in scanning tunnelling microscopy (STM) make it possible to probe the spin dynamics of individual atoms, either isolated or integrated…

介观与纳米尺度物理 · 物理学 2017-02-14 F. Delgado , J. Fernández-Rossier

We demonstrate that the spin Hall effect in a thin film with strong spin-orbit scattering can excite magnetic precession in an adjacent ferromagnetic film. The flow of alternating current through a Pt/NiFe bilayer generates an oscillating…

介观与纳米尺度物理 · 物理学 2015-05-20 Luqiao Liu , Takahiro Moriyama , D. C. Ralph , R. A. Buhrman

We examine the influence of crystal growth on the spin-pumping induced inverse spin Hall effect in Fe/Pt bilayers. The morphology of the Fe/Pt interface influences the effective spin mixing conductance. The increase of growth temperature…

The photonic spin Hall effect (PSHE) in surface plasmon resonance (SPR) structures has great potential for various polarization-sensitive applications and devices. Here, using optical weak measurement, we observe spin-dependent and…

We report a new spin manipulation protocol for periodically reversing the sample magnetization for Magnetic Resonance Force Microscopy. The protocol modulates the microwave excitation frequency synchronously with the position of the…

介观与纳米尺度物理 · 物理学 2011-12-12 K. C. Fong , P. Banerjee , Yu. Obukhov , D. V. Pelekhov , P. C. Hammel

Spin pumping is a widely recognized method to generate the spin current in the spintronics, which is acknowledged as a fundamentally dynamic process equivalent to the spin-transfer torque. In this work, we theoretically verify that the…

介观与纳米尺度物理 · 物理学 2020-06-24 Chunlei Zhang , Jianing Wang , Chendong Jin , Haiyan Xia , Jianbo Wang , Qingfang Liu

We report on a Surface-Plasmon-Resonance (SPR) technique based on Fourier -Transform - Infra - Red (FTIR) spectrometer. In contrast to the conventional surface plasmon technique, operating at a fixed wavelength and a variable angle of…

软凝聚态物质 · 物理学 2013-03-19 V. Lirtsman , M. Golosovsky , D. Davidov

We report on the use of the polarized $^3$He gas filter and neutron resonant enhancement techniques for the measurement of spin-polarized diffuse neutron scattering due to ferromagnetic domains. A CoO/Co exchange biased bilayer was grown on…

材料科学 · 物理学 2007-05-23 F. Radu , A. Vorobiev , J. Major , H. Humblot , K. Westerholt , H. Zabel

Antiferromagnetic (AFM) materials recently have shown interest in the research in spintronics due to its zero stray magnetic field, high anisotropy, and spin orbit coupling. In this context, the bi-metallic AFM Mn2Au has drawn attention…

材料科学 · 物理学 2020-04-15 Braj Bhusan Singh , Subhankar Bedanta

Superconducting resonator parametric amplifiers achieve ultra-low-noise amplification through the nonlinear kinetic inductance of thin-film superconductors. One of the main challenges to the operation of these devices is the separation of…

仪器与探测器 · 物理学 2024-10-29 Songyuan Zhao , Stafford Withington , Christopher Niall Thomas

Spin Hall magnetoresistance (SMR) measurements provide a way to probe the surface spin structure of insulating magnetic materials. Such measurements produce resistance signals of the form {$\Delta$}R {$\propto$}…