Masaoki Oku

3.6k total citations · 2 hit papers
118 papers, 3.2k citations indexed

About

Masaoki Oku is a scholar working on Materials Chemistry, Surfaces, Coatings and Films and Electrical and Electronic Engineering. According to data from OpenAlex, Masaoki Oku has authored 118 papers receiving a total of 3.2k indexed citations (citations by other indexed papers that have themselves been cited), including 77 papers in Materials Chemistry, 43 papers in Surfaces, Coatings and Films and 32 papers in Electrical and Electronic Engineering. Recurrent topics in Masaoki Oku's work include Electron and X-Ray Spectroscopy Techniques (43 papers), Electronic and Structural Properties of Oxides (17 papers) and X-ray Spectroscopy and Fluorescence Analysis (17 papers). Masaoki Oku is often cited by papers focused on Electron and X-Ray Spectroscopy Techniques (43 papers), Electronic and Structural Properties of Oxides (17 papers) and X-ray Spectroscopy and Fluorescence Analysis (17 papers). Masaoki Oku collaborates with scholars based in Japan, United States and Germany. Masaoki Oku's co-authors include Kichinosuke Hirokawa, Shigerô Ikeda, Kazuaki Wagatsuma, Shigemi Kohiki, Toetsu Shishido, Tsuguo Fukuda, Naofumi Ohtsu, Fumihiro Honda, Dorota A. Pawlak and Masahiko Ito and has published in prestigious journals such as Nano Letters, Physical review. B, Condensed matter and Applied Physics Letters.

In The Last Decade

Masaoki Oku

114 papers receiving 3.2k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

X-ray photoelectron spectroscopy of manganese—oxygen systems

1975 540 citations Masaoki Oku, Kichinosuke Hirokawa et al. Journal of Electron Spectroscopy and Related Phenomena profile →
X-ray photoelectron spectroscopy of Co3O4, Fe3O4, Mn3O4, and related compounds

1976 386 citations Masaoki Oku, Kichinosuke Hirokawa Journal of Electron Spectroscopy and Related Phenomena profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Masaoki Oku Japan	28	2.1k	1.2k	763	500	417	118	3.2k
P. Oelhafen Switzerland	15	1.7k 0.8×	1.1k 0.9×	322 0.4×	319 0.6×	452 1.1×	31	3.2k
M. A. Langell United States	25	2.6k 1.2×	2.0k 1.7×	1.1k 1.4×	1.2k 2.4×	429 1.0×	76	4.7k
M. Sergio Moreno Argentina	29	1.9k 0.9×	1.0k 0.9×	536 0.7×	358 0.7×	256 0.6×	134	3.0k
Douglas A. Blom United States	35	2.4k 1.2×	875 0.8×	769 1.0×	634 1.3×	190 0.5×	106	3.5k
P. Jiřı́ček Czechia	23	1.8k 0.9×	1.5k 1.3×	663 0.9×	523 1.0×	307 0.7×	131	3.8k
F. Maury France	32	2.1k 1.0×	886 0.8×	384 0.5×	531 1.1×	678 1.6×	218	3.6k
Chen Xu China	31	2.6k 1.2×	965 0.8×	414 0.5×	640 1.3×	314 0.8×	80	3.6k
E. Paparazzo Italy	25	1.5k 0.7×	645 0.6×	235 0.3×	408 0.8×	276 0.7×	108	2.4k
Noboru Tohge Japan	33	2.8k 1.3×	1.5k 1.3×	283 0.4×	1.1k 2.3×	193 0.5×	131	4.1k
Helge Heinrich United States	35	3.2k 1.6×	2.1k 1.8×	752 1.0×	647 1.3×	396 0.9×	112	4.1k

Countries citing papers authored by Masaoki Oku

Since Specialization

Citations

This map shows the geographic impact of Masaoki Oku's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Masaoki Oku with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Masaoki Oku more than expected).

Fields of papers citing papers by Masaoki Oku

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Masaoki Oku. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Masaoki Oku. The network helps show where Masaoki Oku may publish in the future.

Co-authorship network of co-authors of Masaoki Oku

This figure shows the co-authorship network connecting the top 25 collaborators of Masaoki Oku. A scholar is included among the top collaborators of Masaoki Oku based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Masaoki Oku. Masaoki Oku is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Ohtsu, Naofumi, Masaoki Oku, Akiko Nomura, & Kazuaki Wagatsuma. (2020). XPS spectra of chromium monosilicides and disilicides obtained by in situ fractured clean surfaces. Surface and Interface Analysis. 52(12). 1050–1054. 3 indexed citations

Ohtsu, Naofumi, Masaoki Oku, Toetsu Shishido, & Kazuaki Wagatsuma. (2012). Experimental calibration curve for quantitative XPS analysis constructed from in situ fractured polycrystalline manganese silicide surfaces. Surface and Interface Analysis. 44(8). 993–996. 6 indexed citations

Oku, Masaoki, Shigeru Suzuki, Naofumi Ohtsu, Toetsu Shishido, & Kazuaki Wagatsuma. (2008). Comparison of intrinsic zero-energy loss and Shirley-type background corrected profiles of XPS spectra for quantitative surface analysis: Study of Cr, Mn and Fe oxides. Applied Surface Science. 254(16). 5141–5148. 31 indexed citations

Shirasaki, Kenji, et al.. (2007). Electrodeposition of Lanthanum in Aprotic Solvents Studied by HMDE, EQCM and XPS. ECS Meeting Abstracts. MA2007-01(18). 849–849. 1 indexed citations

Oku, Masaoki, Toetsu Shishido, Hideyuki Matsuta, & Kazuaki Wagatsuma. (2006). Comparison of the background corrected valence band XPS spectra of Fe and Co aluminides and silicides with their electronic structures. Journal of Electron Spectroscopy and Related Phenomena. 153(3). 75–80. 11 indexed citations

Konishi, Tokuzo, et al.. (2005). Valence Determination of Manganese in Battery Cathode Materials by High-Resolution Mn Kα1 Spectra. Analytical Sciences. 21(7). 861–864. 8 indexed citations

Shishido, Toetsu, Jinhua Ye, Kunio Kudou, et al.. (2004). Boron–carbon atomic ratio dependence on the hardness and oxidation resistance of perovskite-type solid solution ScRh3B C1−. Journal of Alloys and Compounds. 375(1-2). 217–220. 7 indexed citations

Oku, Masaoki, Toetsu Shishido, Qiang Sun, et al.. (2003). Comparison of electronic structures of ScAl3 and ScRh3: X-ray photoelectron spectroscopy and ab initio band calculation. Journal of Alloys and Compounds. 358(1-2). 264–267. 9 indexed citations

Kohiki, Shigemi, et al.. (2002). Coupling of codoped In and N impurities in ZnS:Ag: Experiment and theory. Journal of Applied Physics. 91(2). 760–763. 8 indexed citations

10.

Shishido, Toetsu, Kunio Kudou, Shigeru Okada, et al.. (2001). R-Dependency of the Hardness of Perovskite-Type RRh₃B Compounds (R = La, Gd, Lu and Sc). Japanese Journal of Applied Physics. 40(10R). 6037–6037. 13 indexed citations

11.

Kohiki, Shigemi, et al.. (2000). Magnetic properties of CoII mesoclusters. Applied Physics Letters. 77(8). 1194–1196. 9 indexed citations

12.

Shishido, Toetsu, Masaoki Oku, T. Sasaki, et al.. (1999). XPS and magnetic measurements for perovskite-type HoRh3B. Journal of Alloys and Compounds. 283(1-2). 91–94. 12 indexed citations

13.

Shishido, Toetsu, Kunio Kudou, Shigeru Okada, et al.. (1998). Electrical resistivity, oxidation resistivity and hardness of single crystal compounds in the Er–Rh–B system. Journal of Alloys and Compounds. 280(1-2). 65–70. 11 indexed citations

14.

Oku, Masaoki, et al.. (1992). In-situ X-ray photoelectron spectroscopic study of the reversible phase transition between CoO and Co3O4 in oxygen of 10−3 Pa. Applied Surface Science. 55(1). 37–41. 171 indexed citations

15.

Oku, Masaoki, Shigeru Suzuki, Kenji Abiko, Hiroshi Kimura, & Kichinosuke Hirokawa. (1984). Study of chemical states at intergranular fracture planes of iron-phosphorus alloys by auger and electron energy-loss spectroscopies. Journal of Electron Spectroscopy and Related Phenomena. 34(1). 55–65. 9 indexed citations

16.

Hirokawa, Kichinosuke, et al.. (1981). ESCA study of Cu/SiO₂ and Fe/SiO₂ interfaces heated in high vacuum. Surface and Interface Analysis. 3(2). 81–85. 3 indexed citations

17.

Hirokawa, Kichinosuke & Masaoki Oku. (1979). Application of esca to semi-quantitative surface and state analysis of iron oxides. Talanta. 26(9). 855–859. 41 indexed citations

18.

Hirokawa, Kichinosuke, et al.. (1979). Use of ESCA for a convenient and semi-quantitative state analysis of copper-nickel alloy surfaces. Fresenius Zeitschrift für Analytische Chemie. 297(5). 393–397. 10 indexed citations

19.

Oku, Masaoki, et al.. (1976). X-Ray Photoelectron Spectroscopy of Manganese-Oxygen Systems(Chemistry). Science Reports of the Research Institutes, Tohoku University, Series A: Physics, Chemistry, and Metallurgy. 26. 365. 1 indexed citations

20.

Oku, Masaoki, Kichinosuke Hirokawa, & Shigerô Ikeda. (1975). Photoelectron spectral intensities of some first transition series elements in metal cyanides containing inequivalent atoms. Journal of Electron Spectroscopy and Related Phenomena. 6(5). 451–458. 12 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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