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Spin-orbit torque (SOT) induced magnetisation switching in CoFeB/Ta/CoFeB trilayer with two CoFeB layers exhibiting in-plane magnetic anisotropy (IPMA) and perpendicular magnetic anisotropy (PMA) is investigated. Interlayer exchange…

We report the engineering of the polar magnetooptical (MO) Kerr effect in perpendicularly magnetized L10-MnAl epitaxial films with remarkably tuned magnetization, strain, and structural disorder by varying substrate temperature (Ts) during…

Materials Science · Physics 2016-11-15 Lijun Zhu , Liane Brandt , Jianhua Zhao

Co$_2$FeSi(100) films with L2$_1$ structure deposited onto MgO(100) were studied exploiting both longitudinal (LMOKE) and quadratic (QMOKE) magneto-optical Kerr effect. The films exhibit a huge QMOKE signal with a maximum contribution of up…

Materials Science · Physics 2015-06-25 J. Hamrle , S. Blomeier , O. Gaier , B. Hillebrands , H. Schneider , G. Jakob , K. Postava , C. Felser

The ability to monitor and control distinct states is at the heart of emerging quantum technologies. The valley pseudospin in transition metal dichalcogenide (TMDC) monolayers is a promising degree of freedom for such control, with the…

We study the validity and limitations of a macrospin model to describe the voltage-controlled manipulation of ferromagnetic magnetization in nickel thin film/piezoelectric actuator hybrid structures. To this end, we correlate simultaneously…

Materials Science · Physics 2012-04-24 A. Brandlmaier , M. Brasse , S. Geprägs , M. Weiler , R. Gross , S. T. B. Goennenwein

The magneto-optic Kerr effect is a powerful tool for measuring magnetism in thin films at microscopic scales, as was recently demonstrated by the major role it played in the discovery of two-dimensional (2D) ferromagnetism in monolayer…

Mesoscale and Nanoscale Physics · Physics 2021-03-25 Freddie Hendriks , Marcos H. D. Guimarães

We investigate strain-induced contributions to the transient polar magneto-optical Kerr effect response in laser-excited terfenol. The tr-MOKE signals obtained from TbFe$_{2}$ films with and without glass capping exhibit distinct signatures…

Materials Science · Physics 2025-08-12 C. Walz , F. -C. Weber , S. -P. Zeuschner , K. Dumesnil , A. von Reppert , M. Bargheer

Time-resolved scanning Kerr microscopy (TRSKM) is a powerful technique for the investigation of picosecond magnetization dynamics at sub-micron length scales by means of the magneto-optical Kerr effect (MOKE). The spatial resolution of…

So far, studies of spin-orbit torques (SOT) in ferromagnets with perpendicular magnetic anisotropy (PMA) have been restricted to ultra thin samples, while a systematic study of its thickness dependence is still lacking in literature. In…

Mesoscale and Nanoscale Physics · Physics 2018-06-08 Niklas Roschewsky , Charles-Henri Lambert , Sayeef Salahuddin

In magnetically ordered solids a static magnetic field can be generated by virtue of the transverse magneto-optical Kerr effect (TMOKE). Moreover, the latter was shown to be dramatically enhanced due to the optical excitation of surface…

Mesoscale and Nanoscale Physics · Physics 2018-06-14 Stanislav Kolodny , Dmitry Yudin , Ivan Iorsh

Here, we report a novel and conceptually straightforward technique to detect the spin-polarization directly, with laser spot spatial resolution, at buried ferromagnet/insulator interfaces in ambient settings. This has been accomplished by…

Applied Physics · Physics 2024-02-14 Michael Miller , Rene Nacke , Sven Ilse , Gisela Schütz , Eberhard Goering

We report the thickness dependence of Dzyaloshinskii-Moriya interaction (DMI) and spin-orbit torques (SOTs) in Pt\Co(t)\AlOx, studied by current-induced domain wall (DW) motion and second-harmonic experiments. From the DW motion study, a…

In the increasing interests on spin-orbit torque (SOT) with various magnetic materials, we investigated SOT in rare earth-transition metal ferrimagnetic alloys. The harmonic Hall measurements were performed in Pt/GdFeCo bilayers to quantify…

Recently, all-optical magnetization control has been garnering considerable attention in realizing next-generation ultrafast magnetic information devices. Here, employing a magneto-optical Kerr effect (MOKE) microscope, we observed the…

Materials Science · Physics 2023-04-04 Ryunosuke Takahashi , Takuo Ohkochi , Daisuke Kan , Yuichi Shimakawa , Hiroki Wadati

A large anti-damping spin-obit torque (SOT) efficiency in magnetic heterostructures is a prerequisite to realize energy efficient spin torque based magnetic memories and logic devices. The efficiency can be characterized in terms of the…

Nanostructured magneto-optical materials sustaining optical resonances open very efficient way for light control via magnetic field, which is of prime importance for telecommunication and sensing applications. However, usually their…

Spin-orbit torque in heavy metal/ferromagnet heterostructures with broken spatial inversion symmetry provides an efficient mechanism for manipulating magnetization using a charge current. Here, we report the presence of a spin torque in a…

Mesoscale and Nanoscale Physics · Physics 2019-05-29 Ziyan Luo , Qi Zhang , Yanjun Xu , Yumeng Yang , Xinhai Zhang , Yihong Wu

We study the motion of a domain wall on an ultrathin magnetic film using the magneto-optical Kerr effect (MOKE). At tiny magnetic fields, the wall creeps only via thermal activation over the pinning centers present in the sample. Our…

We investigate optically induced ultrafast magnetization dynamics in [Co(0.5 nm)/Pd(1 nm)]x5/NiFe(t) exchange-spring samples with tilted perpendicular magnetic anisotropy using a time-resolved magneto-optical Kerr effect magnetometer. The…

Despite the potential advantages of information storage in antiferromagnetically coupled materials, it remains unclear whether one can control the magnetic moment orientation efficiently because of the cancelled magnetic moment. Here, we…

Materials Science · Physics 2016-10-31 Joseph Finley , Luqiao Liu