Zobrazeno 1 - 10
of 162
pro vyhledávání: '"Yoshihito Maeda"'
Publikováno v:
physica status solidi c. 11:1570-1573
We have investigated atomic ordering of Heusler alloy Fe3Si(111) epitaxially grown on Si(111) by using ion beam analysis. The total atomic displacement along Si directions was deduced from the minimum yield χmin and the critical angle Ψ1/2 for chan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8fa1e32a7dcfe84a0457a46623cec14b
https://doi.org/10.1002/pssc.201400027
https://doi.org/10.1002/pssc.201400027
Enhancement of IR photoluminescence of β‐FeSi 2 nanocrystals by Cu‐doping and study of its mechanism
Autor:
Yoshihito Maeda, Kazumasa Narumi, Yuya Noguchi, Yuki Kawakubo, Seiji Sakai, Hiroyuki Kobayashi, Takahide Tatsumi
Publikováno v:
physica status solidi c. 11:1626-1629
We have investigated the IR photoluminescence (PL) behavior of Cu-doped β-FeSi2 nanocrystals (β-NCs) embedded in Si layers. The diffusion rate of Cu atom was controlled by annealing. The most appropriate condition brought the largest intensities of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e438b8963e125afdd2569b54d458128c
https://doi.org/10.1002/pssc.201400039
https://doi.org/10.1002/pssc.201400039
Autor:
S. Sakai, Takahide Tatsumi, Hiroyuki Kobayashi, Yoshihito Maeda, Yuki Kawakubo, Yuya Noguchi, Kazumasa Narumi
Publikováno v:
JJAP Conference Proceedings. 3:01110701-01110704
We have investigated PL behavior of β-FeSi2 nanocrystals controlled by transport of holes in Cu-doped n-type Si substrates. PL enhancement was observed and PCI-PL measurements revealed that PL enhancement was attributed to a transport process of hol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::edbac071d02d56db549480a28bfc77c3
https://kyutech.repo.nii.ac.jp/records/4407
https://kyutech.repo.nii.ac.jp/records/4407
Autor:
Shinya Yamada, Seiji Sakai, Kazumasa Narumi, Yuki Kawakubo, Yoshihito Maeda, Yuuya Noguchi, Masanobu Miyao, Tomoaki Hirata, Kohei Hamaya
Publikováno v:
physica status solidi c. 10:1828-1831
We have investigated crystal quality of Co2(Mn1–xFex)Si (CMFS) epitaxially grown on Ge(111) by using Rutherford backscattering spectrometry and axial ion channeling technique. It was found that the CMFS/Ge and Co2FeSi (CMFS with x = 1)/Ge have larg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::450803b45a387f3556f7ec31d8612fc9
https://doi.org/10.1002/pssc.201300367
https://doi.org/10.1002/pssc.201300367
Autor:
Kentaro Nishimura, Kazumasa Narumi, Seiji Sakai, Yoshihito Maeda, Bui Matsukura, Takahito Nakajima
Publikováno v:
physica status solidi c. 9:1884-1887
We report enhancement of intrinsic photoluminescence (PL) from β-FeSi2 nanocrystals by doping carbon. In the appropriate dose of C60+ ion implantation into the average nanocrystal size of 14 nm, the PL intensity was enhanced by 260% and increase of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c99ad97d21ddb242ede830d4383d6e93
https://doi.org/10.1002/pssc.201200058
https://doi.org/10.1002/pssc.201200058
Autor:
Seiji Sakai, Kentaro Nishimura, Bui Matsukura, Kazumasa Narumi, Yoshihito Maeda, Takahito Nakajima
Publikováno v:
physica status solidi c. 9:1888-1891
We have systematically investigated photoluminescence (PL) properties of β-phase nanocrystals which are formed by a phase transition from metastable γ-FeSi2 with a Fluorite structure to β-FeSi2, and succeeded in enhancement of the PL intensity in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64241d057d42133ddddf8e96a1aa73d6
https://doi.org/10.1002/pssc.201200072
https://doi.org/10.1002/pssc.201200072
Publikováno v:
Physics Procedia. 23:25-28
We have investigated photoluminescence (PL) properties of β-FeSi2 nanocrystals in Si crystals. The PL spectrum could be separated into three major A, B and C bands and some minor bands. The B and C band (side band) spectra with a Gaussian function s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::670614f49df2ccec7d96ef457de35b7e
Autor:
Kohei Hamaya, Yoshikazu Terai, Taizoh Sadoh, Masanobu Miyao, Yoshihito Maeda, Kazumasa Narumi, Seiji Sakai
Publikováno v:
Thin Solid Films. 519:8461-8467
We have investigated perfection of atomic rows on iron-based Heusler alloy films on Ge(111) planes by using ion channeling technique in order to find the dominant factors for the perfection. Fe 3 Si/Ge(111) and Fe 2 CoSi/Ge(111) have a high quality o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b99bb2c5a8de70d465856a13c245fac
https://doi.org/10.1016/j.tsf.2011.05.024
https://doi.org/10.1016/j.tsf.2011.05.024
Autor:
Yoshihito Maeda, Tatsuya Ikeda, Takayuki Ichikawa, Taizoh Sadoh, Masanobu Miyao, Bui Matsukura, Takahito Nakajima
Publikováno v:
Physics Procedia. 11:200-203
We have examined the LMOKE of some Heusler alloy films Fe4Si, Fe3Si, Fe2CoSi, Fe2MnSi (21 at and 9 at.%Mn), Co2FeSi epitaxially grown on Ge(111) and found that Fe3Si, Fe4Si and Fe2CoSi films have larger Kerr rotation and smaller coercive fields than
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61ba7deecb9318ad5e21bdf0cec3ac68
https://doi.org/10.1016/j.phpro.2011.01.004
https://doi.org/10.1016/j.phpro.2011.01.004
Publikováno v:
Physics Procedia. 11:167-170
We have investigated phonon properties of some β - FeSi 2 crystals with characteristic light emission properties by using measurements of far-infrared absorption and photoluminescence in order to discuss a correlation between them. It has been found
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8486cef482790f55e64dd4f1f48a7a9d
https://doi.org/10.1016/j.phpro.2011.01.007
https://doi.org/10.1016/j.phpro.2011.01.007