Strengthen of magnetic anisotropy of Au/Co/Au nanostructure by surface plasmon resonance

Abstract

We experimentally demonstrated the increase of in-plane magnetic anisotropy in Au/Co/Au nanostructures by localized surface plasmon resonance (LSPR). When an array of Au/Co/Au square patch nanostructures was illuminated with linearly polarized light whose wavelength was 750 nm, the localized surface plasmons were resonantly excited in the nanostructures. From the measurement results of polar magneto-optical Kerr effect curves, we observed the magnetic anisotropy field increase in the Au/Co/Au nanostructure due to the excited surface plasmons. The in-plane magnetic anisotropy energy density was increased about 24%.

Effective Mass for Holes in Paramagnetic, Plasmonic Cu5FeS4 Semiconductor Nanocrystals

“…The observation of a large m * in anatase TiO 2 is thought to arise from crystalline anisotropy, resulting in differences in carrier mobility along separate axes of the crystal structure . In Au/Co/Au film nanostructures, excitation of the LSPR under an applied magnetic field resulted in a strengthening of magnetic anisotropy along a given crystallographic axis . Similarly, the magnetocrystalline anisotropy is anticipated to impact the MCD spectra for 5:1 bornite due to the previously reported magneto-structural transition at 67 K and photoexcitation from the MCD experiment itself.…”

“…44 In Au/Co/Au film nanostructures, excitation of the LSPR under an applied magnetic field resulted in a strengthening of magnetic anisotropy along a given crystallographic axis. 74 Similarly, the magnetocrystalline anisotropy is anticipated to impact the MCD spectra for 5:1 bornite due to the previously reported magneto-structural transition at 67 K 41 and photoexcitation from the MCD experiment itself.…”

Magnetic transition in ultrathin Co sandwiched between Au layers in [Au (3.16 nm)/Co (1.5 nm)]x35/Si(100) multilayers

“…Recently, an increase in magnetic anisotropy in Co/Au nanostructures was observed by localized surface plasmon resonance technique. 31 However, in another study, 32 the modifications in magnetic anisotropy via the ion irradiation route were reported in Co film sandwiched between Au layers. In another recent article, Co/Au multilayer system was thoroughly investigated for its magneto optic properties and because of enhancement in plasmonic properties that are technological important.…”

“…The diffused interfaces between Co/Au can be suppressed by annealing the multilayers at higher temperatures in such a way that total periodicity of the sample remains intact. Recently, an increase in magnetic anisotropy in Co/Au nanostructures was observed by localized surface plasmon resonance technique 31 . However, in another study, 32 the modifications in magnetic anisotropy via the ion irradiation route were reported in Co film sandwiched between Au layers.…”

Field-Free Magnetoplasmon-Induced Ultraviolet Circular Dichroism Switching in Premagnetized Magnetic Nanowires

“…In addition to OC structures, magnetic materials also have the opportunity to be another option for developing optical activity in the UV CD domain. One promising complementary composition that combines noble metals (NMs) and magnetic materials exerts a MO effect that is considerably large compared with those of NM-only or magnetic-only materials. − In addition, this composition’s integrated MO properties can be further enhanced by modifying the photon energy of left- and right-handed circularly polarized incident light. This research field is now known as the magnetoplasmonic field. − Typically, the magnetoplasmonic effect can be tuned by the alteration of the NM and the external magnetic field (a few Tesla).…”