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Journal Articles

Ion channeling study of epitaxy of iron based Heusler alloy films on Ge(111)

Maeda, Yoshihito; Narumi, Kazumasa; Sakai, Seiji; Terai, Yoshikazu*; Hamaya, Kohei*; Sado, Taizo*; Miyao, Masanobu*

Thin Solid Films, 519(24), p.8461 - 8467, 2011/10

 Times Cited Count:7 Percentile:35.48(Materials Science, Multidisciplinary)

Journal Articles

Surface structures on $$beta$$-FeSi$$_2$$ formed by heat-treatment in ultra-high vacuum and their influence for homoepitaxial growth

Matsumura, Seidai*; Ochiai, Kunihito*; Udono, Haruhiko*; Esaka, Fumitaka; Yamaguchi, Kenji; Yamamoto, Hiroyuki; Hojo, Kiichi

Physics Procedia, 11, p.174 - 176, 2011/02

 Times Cited Count:3 Percentile:84.58

The surface structures on the surface of $$beta$$-FeSi$$_2$$ substrate after heat treatment in ultra high vacuum and their influence on homoepitaxial growth were investigated. It was found that the dip structures appeared on the surface of $$beta$$-FeSi$$_2$$ (100) substrate after heat treatment above 1023 K, where the evaporation of surface oxide layer (SiO$$_x$$) occurred. The composition of the dip structure was Fe-rich as compared to nominal $$beta$$-FeSi$$_2$$ composition (Si/Fe=2). This result indicates that the decomposition from $$beta$$-FeSi$$_2$$ to $$epsilon$$-FeSi would occur on the surface. The surface morphology observed after heat treatment depended on the orientation of the substrate. In addition, homoepitaxial films with smooth surface on $$beta$$-FeSi$$_2$$ (111) substrate at the growth temperature of 973 and 1073 K were obtained.

Journal Articles

Surface analysis of single-crystalline $$beta$$-FeSi$$_2$$

Yamada, Yoichi*; Mao, W.*; Asaoka, Hidehito; Yamamoto, Hiroyuki; Esaka, Fumitaka; Udono, Haruhiko*; Tsuru, Tomohito

Physics Procedia, 11, p.67 - 70, 2011/02

 Times Cited Count:3 Percentile:84.58

Clean surfaces of the single crystalline $$beta$$-FeSi$$_2$$ have been prepared and investigated. From XPS (X-ray Photoelectron Spectroscopy) measurements of the surface oxide, it is found that the surface Si is mainly oxidized while Fe isn't. After removing the surface oxide, clean surface can be obtained showing reasonable structure in LEED (Low-Energy Electron Diffraction) and STM (Scanning Tunneling Microscope). No drastic surface reconstruction is found reflecting strong Fe-Si bond. DFT (Density Functional Theory) calculation suggests the spin polarized surface DOS (Density Of State) when Fe comes at the surface.

Journal Articles

Surface characterization of homoepitaxial $$beta$$-FeSi$$_{2}$$ film on $$beta$$-FeSi$$_{2}$$(111) substrate by X-ray photoelectron and absorption spectroscopy

Esaka, Fumitaka; Yamamoto, Hiroyuki; Udono, Haruhiko*; Matsubayashi, Nobuyuki*; Yamaguchi, Kenji; Shamoto, Shinichi; Magara, Masaaki; Kimura, Takaumi

Physics Procedia, 11, p.150 - 153, 2011/02

 Times Cited Count:0 Percentile:0.01

Surface characterization of homoepitaxial $$beta$$-FeSi$$_{2}$$ film on $$beta$$-FeSi$$_{2}$$(111) substrate has been performed by X-ray photoelectron and X-ray absorption spectroscopy.

Journal Articles

Determination of silicon vacancy in ion-beam synthesized $$beta$$-FeSi$$_{2}$$

Maeda, Yoshihito; Ichikawa, Takayuki*; Jonishi, Takafumi*; Narumi, Kazumasa

Physics Procedia, 11, p.83 - 86, 2011/00

 Times Cited Count:0 Percentile:0.01

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