Search Results - "NARAMOTO, Hiroshi"

Synchrotron X-ray standing wave Characterization of atomic arrangement at interface between transferred graphene and α-Al2O3(0001) by Entani, Shiro, Honda, Mitsunori, Naramoto, Hiroshi, Li, Songtian, Sakai, Seiji

“…•Vertical atomic arrangement at the graphene/substrate interface can be analyzed by synchrotron X-ray standing wave technique.•The graphene sheet transferred…”
Get full text

Magnetoresistance effect in Fe20Ni80/graphene/Fe20Ni80 vertical spin valves by Entani, Shiro, Seki, Takeshi, Sakuraba, Yuya, Yamamoto, Tatsuya, Takahashi, Saburo, Naramoto, Hiroshi, Takanashi, Koki, Sakai, Seiji

“…Vertical spin valve devices with junctions of single- and bi-layer graphene interlayers sandwiched with Fe20Ni80 (Permalloy) electrodes were fabricated by…”
Get full text

Graphene/Half‐Metallic Heusler Alloy: A Novel Heterostructure toward High‐Performance Graphene Spintronic Devices by Li, Songtian, Larionov, Konstantin V., Popov, Zakhar I., Watanabe, Takahiro, Amemiya, Kenta, Entani, Shiro, Avramov, Pavel V., Sakuraba, Yuya, Naramoto, Hiroshi, Sorokin, Pavel B., Sakai, Seiji

“…Graphene‐based vertical spin valves (SVs) are expected to offer a large magnetoresistance effect without impairing the electrical conductivity, which can pave…”
Get full text

Sputtering Yields of Si Bombarded with 10–540-keV C60 Ions by Narumi, Kazumasa, Naramoto, Hiroshi, Yamada, Keisuke, Chiba, Atsuya, Saitoh, Yuichi

“…Sputtering yields of Si have been measured for C60 ions in the energy range from 10 to 540 keV, where the nuclear stopping is dominant, by measuring thickness…”
Get full text

Contracted interlayer distance in graphene/sapphire heterostructure by Entani, Shiro, Antipina, Liubov Yu, Avramov, Pavel V., Ohtomo, Manabu, Matsumoto, Yoshihiro, Hirao, Norie, Shimoyama, Iwao, Naramoto, Hiroshi, Baba, Yuji, Sorokin, Pavel B., Sakai, Seiji

“…Direct growth of graphene on insulators is expected to yield significant improvements in performance of graphene-based electronic and spintronic devices. In…”
Get full text

Spintronic Devices: Graphene/Half‐Metallic Heusler Alloy: A Novel Heterostructure toward High‐Performance Graphene Spintronic Devices (Adv. Mater. 6/2020) by Li, Songtian, Larionov, Konstantin V., Popov, Zakhar I., Watanabe, Takahiro, Amemiya, Kenta, Entani, Shiro, Avramov, Pavel V., Sakuraba, Yuya, Naramoto, Hiroshi, Sorokin, Pavel B., Sakai, Seiji

“…In article number 1905734, Songtian Li, Pavel B. Sorokin, and co‐workers report a novel graphene/Heusler alloy heterostructure, which is found to show several…”
Get full text

Interface-induced perpendicular magnetic anisotropy of Co nanoparticles on single-layer h-BN/Pt(111) by Watanabe, Takahiro, Yamada, Yoichi, Koide, Akihiro, Entani, Shiro, Li, Songtian, Popov, Zakhar I., Sorokin, Pavel B., Naramoto, Hiroshi, Sasaki, Masahiro, Amemiya, Kenta, Sakai, Seiji

“…Ferromagnetism with perpendicular magnetic anisotropy (PMA) was observed at room temperature in cobalt nanoparticles (NPs) grown on hexagonal boron nitride…”
Get full text

Interface Properties of Metal/Graphene Heterostructures Studied by Micro-Raman Spectroscopy by Entani, Shiro, Sakai, Seiji, Matsumoto, Yoshihiro, Naramoto, Hiroshi, Hao, Ting, Maeda, Yoshihito

“…Studies are conducted for the influence of the interface formation of graphene with various transition metals on its vibrational properties by using confocal…”
Get full text

Contact-induced spin polarization of monolayer hexagonal boron nitride on Ni(111) by Ohtomo, Manabu, Yamauchi, Yasushi, Kuzubov, Alex A., Eliseeva, Natalya S., Avramov, Pavel V., Entani, Shiro, Matsumoto, Yoshihiro, Naramoto, Hiroshi, Sakai, Seiji

“…Hexagonal boron nitride (h-BN) is a promising barrier material for graphene spintronics. In this Letter, spin-polarized metastable de-excitation spectroscopy…”
Get full text

Ab initio LC-DFT study of graphene, multilayer graphenes and graphite by Avramov, Pavel V., Sakai, Seiji, Entani, Shiro, Matsumoto, Yoshihiro, Naramoto, Hiroshi

“…[Display omitted] ► We studied performance of long-corrected HSE DFT for 2D graphenes and graphite. ► HSE potential is the best for CC bonds and stacking…”
Get full text

Theoretical Investigation of the Interfaces and Mechanisms of Induced Spin Polarization of 1D Narrow Zigzag Graphene- and h‑BN Nanoribbons on a SrO-Terminated LSMO(001) Surface by Avramov, Paul, Kuzubov, Alexander A., Kuklin, Artem V., Lee, Hyosun, Kovaleva, Evgenia A., Sakai, Seiji, Entani, Shiro, Naramoto, Hiroshi, Sorokin, Pavel B.

“…The structure of the interfaces and the mechanisms of induced spin polarization of 1D infinite and finite narrow graphene- and h-BN zigzag nanoribbons placed…”
Get full text

Effective adsorption and collection of cesium from aqueous solution using graphene oxide grown on porous alumina by Entani, Shiro, Honda, Mitsunori, Shimoyama, Iwao, Li, Songtian, Naramoto, Hiroshi, Yaita, Tsuyoshi, Sakai, Seiji

“…Graphene oxide (GO) with a large surface area was synthesized by the direct growth of GO on porous alumina using chemical vapor deposition to study the Cs…”
Get full text

Tunnel magnetoresistance in Co nanoparticle/Co–C60 compound hybrid system by Sakai, Seiji, Yakushiji, Kay, Mitani, Seiji, Takanashi, Koki, Naramoto, Hiroshi, Avramov, Pavel V., Narumi, Kazumasa, Lavrentiev, Vasily, Maeda, Yoshihito

“…A nanometer-scale hybrid film of Co particle/Co–C60 compound was prepared by alternate deposition of Co and C60 under UHV condition. All of Raman spectra,…”
Get full text

High spin polarization at the Fe/C60 interface in the Fe-doped C60 film by Sakai, Seiji, Matsumoto, Yoshihiro, Ohtomo, Manabu, Entani, Shiro, Avramov, Pavel V., Sorokin, Pavel B., Naramoto, Hiroshi

“…► Process of the tunneling conduction and TMR effect in a Fe-doped C60 films is studied. ► Remarkably higher interface spin polarization than that in Fe…”
Get full text

Ferromagnetic interlayer coupling in C60–Co compound/Ni bilayer structure by Matsumoto, Yoshihiro, Sakai, Seiji, Entani, Shiro, Takagi, Yasumasa, Nakagawa, Takeshi, Naramoto, Hiroshi, Avramov, Pavel, Yokoyama, Toshihiko

“…[Display omitted] ► Ferromagnetic coupling was found in the C60–Co compound/Ni bilayer structures. ► The observed ferromagnetic coupling extends several layers…”
Get full text

Giant tunnel magnetoresistance in codeposited fullerene-cobalt films in the low bias-voltage regime by Sakai, Seiji, Sugai, Isamu, Mitani, Seiji, Takanashi, Koki, Matsumoto, Yoshihiro, Naramoto, Hiroshi, Avramov, Pavel V., Okayasu, Satoru, Maeda, Yoshihito

“…Magnetotransport properties in the low bias-voltage regime were investigated for codeposited C 60 - Co films. A giant tunnel magnetoresistance (MR) ratio ( Δ R…”
Get full text

Polymerization of solid C60 under C+60 cluster ion bombardment by LAVRENTIEV, Vasily, VACIK, Jiri, NARAMOTO, Hiroshi, NARUMI, Kazumasa

Get full text

Comparative study of structures and electrical properties in cobalt–fullerene mixtures by systematic change of cobalt content by Sakai, Seiji, Naramoto, Hiroshi, Avramov, Pavel V., Yaita, Tsuyoshi, Lavrentiev, Vasily, Narumi, Kazumasa, Baba, Yuji, Maeda, Yoshihito

“…A systematic study is performed for the Co content-dependent structure evolution and electrical properties in the cobalt (Co)–fullerene (C 60) mixtures in the…”
Get full text

Controllable fabrication of amorphous Si layer by energetic cluster ion bombardment by Lavrentiev, Vasily, Vorliček, Vladimir, Dejneka, Alexandr, Chvostova, Dagmar, Jäger, Aleš, Vacik, Jiri, Jastrabik, Lubomir, Naramoto, Hiroshi, Narumi, Kazumasa

“…We report on the fabrication of an amorphous Si (a-Si) thin layer by means of bombardment of a Si(100) surface using monoenergetic C60 cluster ions with…”
Get full text

Interface Properties of Ag and Au/Graphene Heterostructures Studied by Micro-Raman Spectroscopy by Entani, Shiro, Sakai, Seiji, Matsumoto, Yoshihiro, Naramoto, Hiroshi, Hao, Ting, Maeda, Yoshihito

“…We have studied the influence of the interface formation of graphene with noble metals (Ag and Au) on its vibrational properties by using confocal micro-Raman…”
Get full text