Sizeable magnetic circular dichroism of artificially precipitated Co clusters in amorphous carbon AIP Advances 2, 032142 (2012) Ferromagnetic properties of GdN thin films studied by temperature dependent circular polarized spectroscopy Appl. Phys. Lett. 101, 072403 (2012) Carrier-dopant exchange interactions in Mn-doped PbS colloidal quantum dots Appl. Phys. Lett. 101, 062410 (2012) Faraday rotation effect in periodic graphene structureThe hydrogenation induced change of magneto-optical Kerr effect (MOKE) was studied in n ML Pd/30 ML Fe bilayers on Al 2 O 3 (0001). With the increasing of Pd thickness from 3 ML to 60 ML, the MOKE extinction angle was gradually shifted by 0.6 and the enhancement of Kerr intensity reached 35%-40% after exposure to 1 atm hydrogen. The reversibility of this significant change was demonstrated by cyclic desorption and reabsorption of hydrogen. This study reveals the sensitive MO response in the combination of a magnetic Fe thin film with a highly hydrogenated Pd capping layer. V C 2012 American Institute of Physics. [http://dx.
This study reports the preparation of self-organized 1-dimensional magnetic structures of Fe on Al 2 O 3 (0001) by oblique deposition. The x-ray diffraction (XRD) results in this study show the preferred (110) texture of the Fe films. XRD and extended x-ray adsorption fine structure measurements indicate larger oblique deposition angle (65) leads to more disorder in the Fe crystalline structure. After capping with a Pd overlayer, the Pd/Fe/Al 2 O 3 (0001) still exhibits uniaxial magnetic anisotropy induced by the underlying 1-dimensional Fe nanostructure. This uniaxial magnetic anisotropy changes with the variation in Fe thickness and oblique deposition angle. These results clearly indicate the feasibility of manipulating uniaxial magnetic anisotropy and crystalline order through the oblique deposition of magnetic materials. V
Co thin films were grown on planar highly oriented pyrolytic graphite (p-HOPG) and Ar þ sputtered HOPG (s-HOPG) for comparison. Measurement of Auger ratio Co/C suggested the more uniform nucleation for Co on s-HOPG. Co/p-HOPG exhibited only in-plane magnetization, whereas Co/s-HOPG revealed the coexistence of in-plane and perpendicular MOKE hysteresis loops, indicating stable canted magnetization. The canted magnetization of Co/s-HOPG, which persisted at least up to 50 ML, could be attributed to volume-contributed perpendicular anisotropy. These observations will be valuable for future applications in the combination of metallic magnetic materials and carbon-based templates. V
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