MAGNETO-OPTIC FARADAY EFFECT ON SPIN ANISOTROPIC <font>Co</font> ULTRATHIN FILMS AND POST-NITRIDIZATION ON <font>ZnO</font>(002) CRYSTAL

Su, C. W.; Chang, Shun‐Hsyung; Chang, Y. C.

doi:10.1142/s2010324712500178

Cited by 5 publications

(3 citation statements)

References 28 publications

(16 reference statements)

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“…A superconducting quantum interference device (SQUID, Quantum design, MPMS XL), and a micro-Raman spectrometer (Renishaw system 1000) with 532 nm incident photons from a diode-pump solid state laser operated at a maximum power of 3.5 mW were used to determine the antiferromagnetic anisotropy and spin-wave waveguide of the 1D NiO nanorods, respectively. The application of the optical magnonics on the 1D NiO nanorods was evaluated by using a magneto-optical Faraday effect (MOFE) magnetometer [40][41][42] (homemade) using a polarized He-Ne laser beam of 633 nm.…”

Section: Methodsmentioning

confidence: 99%

Terahertz spin-wave waveguides and optical magnonics in one-dimensional NiO nanorods

Patil

Chuang

et al. 2016

Nanoscale

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The two-magnon (2M) spin waves with a magnon frequency of 43 THz, generated by a polarized laser, were first observed in one-dimensional (1D) NiO nanorods. The 1D NiO nanorods of ∼700 nm length, which have perfectly in-plane antiferromagnetic spins lying on the (200) and (100) faces, are the smallest spin-wave waveguides. Due to the magneto-optical Faraday effect (MOFE), the significant change in the Faraday intensity can show the 2M information in the NiO nanorods. There are only two 2M-on and 2M-off states at various applied alternating-current magnetic fields and laser-incident angles, which make the 1D NiO nanorods excellent optical nanomagnonics.

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Section: Methodsmentioning

confidence: 99%

Terahertz spin-wave waveguides and optical magnonics in one-dimensional NiO nanorods

Patil

Chuang

et al. 2016

Nanoscale

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“…The field direction in the ultrahigh vacuum chamber was defined elsewhere [22,23]. Figure 2 demonstrates the detection limit of our optical devices.…”

Section: Principle and Experimentsmentioning

confidence: 99%

“…To verify this assumption, we further observed the effect on the undetermined magnetic properties in the longitudinal and perpendicular fields. The field direction in the ultrahigh vacuum chamber was defined elsewhere [ 22 , 23 ]. Figure 2 demonstrates the detection limit of our optical devices.…”

Section: Principle and Experimentsmentioning

confidence: 99%

Magnetic Phase Transition in Ion-Irradiated Ultrathin CoN Films via Magneto-Optic Faraday Effect

Chang

2013

Materials

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The magnetic properties of 1 nm thick in-plane anisotropic Co ultrathin film on ZnO(0001) were investigated through successive 500 eV nitrogen-ion sputtering. Magneto-optical Faraday effects were used to observe the evolution of the ion-irradiated sample in longitudinal and perpendicular magnetic fields. The ferromagnetic phase of the initial in-plane anisotropic fcc β-Co phase transformation to β-Co(N) phase was terminated at paramagnetic CoNx phase. In-plane anisotropy with weak out-of-plane anisotropy of the Co/ZnO sample was initially observed in the as-grown condition. In the sputtering process, the N+ ions induced simultaneous sputtering and doping. An abrupt spin reorientation behavior from in-plane to out-of-plane was found under prolonged sputtering condition. The existence of perpendicular anisotropy measured from the out-of-plane Faraday effect may be attributed to the co-existence of residual β-Co and Co4N exchange bonding force by the gradual depletion of Co-N thickness.

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Periodic reversal of magneto-optic Faraday rotation on uniaxial birefringence crystal with ultrathin magnetic films

Chang

2013

AIP Advances

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An experimental approach of inclined incidence magneto-optic Faraday effect observed in the polar plane is applied. Three samples containing ferromagnetic cobalt ultrathin films on a semiconductor zinc oxide (0001) single crystal substrate with in-plane and out-of-plane anisotropy are evaluated. Through the fine adjustment of crossed polarizers in the magneto-optic effect measurement completely recorded the detail optical and magneto-optical responses from the birefringent crystal substrate and the magnetic film, especially for the signal induced from the substrate with uniaxial optical axis. The angle dependency of interference phenomena periodically from the optical and magneto-optical responses is attributed to the birefringence even in the absence of a magnetic field. The new type of observation finds that the transmission Faraday intensity in the oblique incidence includes a combination of polarization rotations, which results from optical compensation from the substrate and magneto-optical Faraday effects from the film. The samples grown at different rates and examined by this method exhibit magnetic structure discriminations. This result can be applied in the advanced polarized-light technologies to enhance the spatial resolution of magnetic surfaces with microstructural information under various magnetic field direction

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MAGNETO-OPTIC FARADAY EFFECT ON SPIN ANISOTROPIC Co ULTRATHIN FILMS AND POST-NITRIDIZATION ON ZnO(002) CRYSTAL

Cited by 5 publications

References 28 publications

Terahertz spin-wave waveguides and optical magnonics in one-dimensional NiO nanorods

Terahertz spin-wave waveguides and optical magnonics in one-dimensional NiO nanorods

Magnetic Phase Transition in Ion-Irradiated Ultrathin CoN Films via Magneto-Optic Faraday Effect

Periodic reversal of magneto-optic Faraday rotation on uniaxial birefringence crystal with ultrathin magnetic films

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