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We demonstrate that the magneto-optic-Kerr effect with normal light incidence can be used to obtain quantitative optical measurements of both components of spin-orbit-induced torque (both the antidamping and effective-field components) in…

Mesoscale and Nanoscale Physics · Physics 2018-01-31 Xin Fan , Alex R. Mellnik , Wenrui Wang , Neal Reynolds , Tao Wang , Halise Celik , Virginia O. Lorenz , Daniel C. Ralph , John Q. Xiao

The magnetization reversal in stripe-like exchange bias patterned $\rm Ni_{81}Fe_{19}/IrMn$ thin films was investigated by complementary inductive and high resolution magneto optical magnetometry, magneto optical Kerr microscopy, and…

Materials Science · Physics 2015-05-14 C. Hamann , B. P. Toperverg , K. Theis-Bröhl , M. Wolff , R. Kaltofen , I. Mönch , J. McCord , L. Schultz

Chiral molecules have the potential for creating new magnetic devices by locally manipulating the magnetic properties of metallic surfaces. When chiral polypeptides chemisorb onto ferromagnets they can induce magnetization locally by spin…

Chemical Physics · Physics 2023-06-30 Yael Kapon , Fabian Kammerbauer , Shira Yochelis , Mathias Klaui , Yossi Paltiel

We report on giant positive magnetoresistance effect observed in VOx thin films, epitaxially grown on SrTiO3 substrate. The MR effect depends strongly on temperature and oxygen content and is anisotropic. At low temperatures its magnitude…

Strongly Correlated Electrons · Physics 2009-11-10 A. D. Rata , V. Kataev , D. Khomskii , T. Hibma

Here we report the measurement of the interfacial spin accumulation induced by the spin Hall effect in Pt and W thin films using magneto-optical Kerr microscopy. We show that the Kerr rotation has opposite sign in Pt and W and scales…

The influence of a patterned substrate on obliquely deposited, exchange biased Co/CoO films was studied. It was found that substrates decorated with nanoparticle patterns provide the option to manipulate the orientation of the magnetic easy…

The effect of picosecond acoustic strain pulses (ps-ASP) on a thin layer of (Ga,Mn)As co-doped with phosphorus was probed using magneto-optical Kerr effect (MOKE). A transient MOKE signal followed by low amplitude oscillations was…

Materials Science · Physics 2013-01-09 L. Thevenard , E. Peronne , C. Gourdon , C. Testelin , M. Cubukcu , E. Charron , S. Vincent , A. Lemaitre , B. Perrin

Thickness dependence and strain effects in films of $La_{1-x}A_xMnO_3$ perovskites are analyzed in the colossal magnetoresistance regime. The calculations are based on a generalization of a variational approach previously proposed for the…

Strongly Correlated Electrons · Physics 2009-11-10 C. A. Perroni , V. Cataudella , G. De Filippis , G. Iadonisi , V. Marigliano , F. Ventriglia

Reflecting the fundamental interactions of polarized light with magnetic matter, magneto-optical effects are well known since more than a century. The emergence of these phenomena is commonly attributed to the interplay between exchange…

Array-patterned CoPd-based heterostructures are created through e-beam lithography and plasma pretreatment that induces oxidation with depth gradient in the CoPd alloy films, breaking the central symmetry of the structure. Effects on the…

Mesoscale and Nanoscale Physics · Physics 2022-04-27 Wei-Hsiang Wang , Ching-Yang Pan , Chak-Ming Liu , Wen-Chin Lin , Pei-hsun Jiang

Ferromagnetic substrate influences the electromagnetic response of a type-II superconducting film to the applied magnetic field. We present a two-dimensional integrodifferential model for the magnetization of a flat…

Superconductivity · Physics 2024-02-12 Leonid Prigozhin , Vladimir Sokolovsky

Magnetic bilayers consisting of an epitaxially grown ferrimagnetic insulator and a heavy metal layer are attractive for spintronic application because of the opportunity for electric control and read-out of spin textures via spin orbit…

Magnetism of FeRh (001) films strongly depends on film thickness and surface terminations. While magnetic ground state of bulk FeRh is G-type antiferromagnetism, the Rh-terminated films exhibit ferromagnetism with strong perpendicular MCA…

Materials Science · Physics 2015-08-11 Soyoung Jekal , S. H. Rhim , Soon Cheol Hong , Won-joon Son , Alexander B. Shick

We investigated the magnetization dynamics of a patterned Co$_{25}$Fe$_{75}$-based heterostructure with a novel optical measurement technique that we call microfocused frequency-resolved magneto optic Kerr effect ($\mu$FR-MOKE). We measured…

Mesoscale and Nanoscale Physics · Physics 2019-06-25 Lukas Liensberger , Luis Flacke , David Rogerson , Matthias Althammer , Rudolf Gross , Mathias Weiler

Antiferromagnetic (AFM) materials offer a promising platform for exploring novel couplings between altermagnetic (AM) spin-splitting and magneto-optical Kerr effect (MOKE), with potential applications in next-generation quantum…

The magnetic state of heavy metal Pt thin films in proximity to the ferrimagnetic insulator Y$_{3}$Fe$_{5}$O$_{12}$ has been investigated systematically by means of x-ray magnetic circular dichroism and x-ray resonant magnetic reflectivity…

Using an enhanced optically heterodyned optical Kerr effect method and a theoretical description of the interactions between an optical beam, a single layer of graphene, and its substrate, we provide experimental answers to questions raised…

Optics · Physics 2017-12-20 Evdokia Dremetsika , Pascal Kockaert

We study the magnetic properties of nanoscale magnetic films with large perpendicular anisotropy comparing polarization microscopy measurements on Co_28Pt_72 alloy samples based on the magneto-optical Kerr effect with Monte Carlo…

Materials Science · Physics 2009-10-30 U. Nowak , J. Heimel , T. Kleinefeld , D. Weller

Evolution of magnetization behaviour of cobalt film on nano patterned silicon substrate, with film thickness, has been studied. In situ magneto-optical Kerr effect measurements during film deposition allowed us to study genuine thickness…

Materials Science · Physics 2020-03-18 Khushboo Bukharia , Prasanta Karmakar , Dileep Kumar , Ajay Gupta

The magnetic behavior of thin ferromagnetic itinerant-electron films is investigated within the strongly correlated single-band Hubbard model. For its approximate solution we apply a generalization of the modified alloy analogy (MAA) to…

Strongly Correlated Electrons · Physics 2009-10-31 T. Herrmann , W. Nolting