Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Toshiharu Ohnuma"'
Publikováno v:
AIP Advances, Vol 6, Iss 11, Pp 115003-115003-17 (2016)
We investigated the intrinsic defect formation energy and oxide-ion migration mechanism in Gd2Ti2O7 pyrochlore. It was found that the vacancy formation energy of Gd is lower than that of Ti. For the oxygen vacancy, O(48f) was found to show lower vaca
Externí odkaz:
https://doaj.org/article/6f96e7d63a4c4bd9bc641fcd2198c8cd
Autor:
Toshiharu Ohnuma
Publikováno v:
Microscopy and Microanalysis. 28:1181-1187
First-principles calculations were performed on the evaporation field of Fe, Cu, Mn, and Si in Fe (001) and on the evaporation field and roll-up effect of Fe, Cu, and Mn in the Fe (001) step structure. The larger the evaporation barrier energy tenden
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::350799fcf56111dc3a992f4414757cbc
https://doi.org/10.1017/s1431927621000155
https://doi.org/10.1017/s1431927621000155
Publikováno v:
SSRN Electronic Journal.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2faab15fbd0e8e5c8f5b581fe208e54a
https://doi.org/10.2139/ssrn.4214191
https://doi.org/10.2139/ssrn.4214191
Publikováno v:
SSRN Electronic Journal.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9596d0ac2b893bfeee4352b431359285
https://doi.org/10.2139/ssrn.4174967
https://doi.org/10.2139/ssrn.4174967
Autor:
Toshiharu Ohnuma
Publikováno v:
Microscopy and Microanalysis. 25:547-553
First-principles calculations were performed to determine the Fe on Fe (001) evaporation field and to characterize the surface diffusion of Fe and Cu on Fe (001) and on a step structure under an applied electric field. The evaporation field of Fe on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da49476e4411d2250a4ceff2fa6ddb58
https://doi.org/10.1017/s1431927618015738
https://doi.org/10.1017/s1431927618015738
Autor:
Kaoru Nakamura, Toshiharu Ohnuma
Publikováno v:
MRS Advances. 4:531-537
By using systematic first-principles calculation, we found that AlTlO3 compound of LiNbO3 structure shows large piezoelectric constants e33 of 10.7 C/m2 and d33 of 56.7 pC/N. These piezoelectric constants are approximately six times larger than those
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b15f9e36b46f750bb0ccf6687f9e6a74
https://doi.org/10.1557/adv.2019.92
https://doi.org/10.1557/adv.2019.92
Autor:
Toshiharu Ohnuma, Takeshi Kobayashi
Publikováno v:
RSC Advances. 9:35655-35661
Simulation of Ni K-edge X-ray absorption near edge structure (XANES) spectra in LiNi0.5Co0.2Mn0.3O2 (NCM523) was performed. The structure of NCM523 was optimized by first-principles calculation based on density functional theory and XANES spectrum si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ffcc095965dc0bd981fafb31caae9a69
https://doi.org/10.1039/c9ra03606g
https://doi.org/10.1039/c9ra03606g
Autor:
Toshiharu Ohnuma, Naoki Soneda, Kenji Dohi, Naoto Sekimura, Dongyue Chen, Kenji Nishida, Kenta Murakami, Li Liu, Zhengcao Li
Publikováno v:
Journal of Nuclear Materials. 494:354-360
Recent atom probe tomography (APT) study has revealed the complicated nature of Ni-Si precipitates in irradiated stainless steels. Although Ni 3 Si γ′ phase has been confirmed under transmission electron microscopy (TEM), the Ni/Si ratio of the pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::596bd2fc85a3be9b69f7ab6d05ed613c
https://doi.org/10.1016/j.jnucmat.2017.07.029
https://doi.org/10.1016/j.jnucmat.2017.07.029
Publikováno v:
Journal of Chemical Physics; 2016, Vol. 145 Issue 6, p1-15, 15p, 1 Diagram, 4 Charts, 13 Graphs
Publikováno v:
Journal of Applied Physics; 2016, Vol. 119 Issue 11, p1-10, 10p, 2 Diagrams, 1 Chart, 9 Graphs