Kengo Oka

3.1k total citations
88 papers, 2.5k citations indexed

About

Kengo Oka is a scholar working on Electronic, Optical and Magnetic Materials, Materials Chemistry and Electrical and Electronic Engineering. According to data from OpenAlex, Kengo Oka has authored 88 papers receiving a total of 2.5k indexed citations (citations by other indexed papers that have themselves been cited), including 55 papers in Electronic, Optical and Magnetic Materials, 55 papers in Materials Chemistry and 24 papers in Electrical and Electronic Engineering. Recurrent topics in Kengo Oka's work include Magnetic and transport properties of perovskites and related materials (42 papers), Ferroelectric and Piezoelectric Materials (32 papers) and Multiferroics and related materials (24 papers). Kengo Oka is often cited by papers focused on Magnetic and transport properties of perovskites and related materials (42 papers), Ferroelectric and Piezoelectric Materials (32 papers) and Multiferroics and related materials (24 papers). Kengo Oka collaborates with scholars based in Japan, United States and United Kingdom. Kengo Oka's co-authors include Masaki Azuma, Yuichi Shimakawa, Masaichiro Mizumaki, Wei‐Tin Chen, J. Paul Attfield, Naoki Ishimatsu, Tetsu Watanuki, Matthew G. Tucker, Hajime Hojo and Hayato Seki and has published in prestigious journals such as Journal of the American Chemical Society, Physical Review Letters and Advanced Materials.

In The Last Decade

Kengo Oka

84 papers receiving 2.5k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Kengo Oka Japan 29 1.9k 1.4k 728 529 393 88 2.5k
А. P. Tyutyunnik Russia 20 1.4k 0.8× 673 0.5× 719 1.0× 352 0.7× 205 0.5× 249 1.9k
S.Ya. Istomin Russia 23 1.2k 0.6× 940 0.7× 602 0.8× 491 0.9× 461 1.2× 94 1.8k
Atsushi Kitada Japan 22 700 0.4× 648 0.5× 661 0.9× 432 0.8× 165 0.4× 95 1.6k
V. Siruguri India 27 1.3k 0.7× 1.7k 1.2× 516 0.7× 937 1.8× 228 0.6× 149 2.4k
Antoine Villesuzanne France 24 937 0.5× 861 0.6× 544 0.7× 464 0.9× 97 0.2× 81 1.7k
P. Dordor France 23 1.7k 0.9× 1.2k 0.9× 432 0.6× 707 1.3× 154 0.4× 62 2.2k
Kun Lin China 26 1.6k 0.9× 683 0.5× 806 1.1× 164 0.3× 153 0.4× 117 2.0k
Florian Pielnhofer Germany 22 1.3k 0.7× 674 0.5× 656 0.9× 277 0.5× 308 0.8× 70 2.0k
Sudhindra Rayaprol India 31 1.4k 0.7× 2.3k 1.6× 392 0.5× 1.7k 3.2× 179 0.5× 233 2.9k
В.А. Черепанов Russia 27 1.8k 1.0× 1.7k 1.2× 280 0.4× 529 1.0× 89 0.2× 149 2.2k

Countries citing papers authored by Kengo Oka

Since Specialization
Citations

This map shows the geographic impact of Kengo Oka'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 Kengo Oka with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Kengo Oka more than expected).

Fields of papers citing papers by Kengo Oka

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Kengo Oka. 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 Kengo Oka. The network helps show where Kengo Oka may publish in the future.

Co-authorship network of co-authors of Kengo Oka

This figure shows the co-authorship network connecting the top 25 collaborators of Kengo Oka. A scholar is included among the top collaborators of Kengo Oka 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 Kengo Oka. Kengo Oka is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Das, Hena, Kengo Oka, Yoshihiro Kusano, et al.. (2024). Pressure-Induced YbFe2O4-Type to Spinel Structural Change of InGaMgO4. SHILAP Revista de lepidopterología. 5(3). 422–433.
2.
Oka, Kengo, et al.. (2023). Compaction of α”-Fe16N2 particles by high-pressure treatment at several gigapascals. Scripta Materialia. 229. 115390–115390. 2 indexed citations
3.
Oka, Kengo, et al.. (2023). UV ozone treatment for oxidization of spiro-OMeTAD hole transport layer. RSC Advances. 13(27). 18561–18567. 3 indexed citations
4.
Oka, Kengo, Tom Ichibha, Daichi Kato, et al.. (2022). Anionic ordering in Pb2Ti4O9F2 revisited by nuclear magnetic resonance and density functional theory. Dalton Transactions. 51(40). 15361–15369. 2 indexed citations
5.
Oka, Kengo, et al.. (2022). Negative Thermal Expansion in Fluoroapatite Pb5(VO4)3F Enhanced by the Steric Effect of Pb2+. Inorganic Chemistry. 61(32). 12552–12558. 2 indexed citations
6.
Sakai, Yuki, Takumi Nishikubo, Zhao Pan, et al.. (2020). Negative Thermal Expansion in Lead-Free La-Substituted Bi0.5Na0.5VO3. Chemistry of Materials. 32(11). 4832–4837. 13 indexed citations
7.
Yamada, Ikuya, Hirofumi Tsukasaki, Shogo Kawaguchi, et al.. (2020). Enhanced Catalytic Activity and Stability of the Oxygen Evolution Reaction on Tetravalent Mixed Metal Oxide. Chemistry of Materials. 32(9). 3893–3903. 44 indexed citations
8.
Ikeno, Hidekazu, Shogo Kawaguchi, Kengo Oka, et al.. (2020). Highly active hydrogen evolution catalysis on oxygen-deficient double-perovskite oxide PrBaCo2O6−δ. Materials Chemistry Frontiers. 4(5). 1519–1529. 25 indexed citations
9.
Pan, Zhao, Xingxing Jiang, Takumi Nishikubo, et al.. (2019). Pronounced Negative Thermal Expansion in Lead-Free BiCoO3-Based Ferroelectrics Triggered by the Stabilized Perovskite Structure. Chemistry of Materials. 31(16). 6187–6192. 16 indexed citations
10.
Ogata, Takahiro, Kengo Oka, & Masaki Azuma. (2019). Negative thermal expansion in electron doped PbVO3−x F x . Applied Physics Express. 12(2). 23005–23005. 16 indexed citations
11.
Nishikubo, Takumi, Yuki Sakai, Kengo Oka, et al.. (2019). Enhanced Negative Thermal Expansion Induced by Simultaneous Charge Transfer and Polar–Nonpolar Transitions. Journal of the American Chemical Society. 141(49). 19397–19403. 37 indexed citations
12.
Yamada, Ikuya, et al.. (2019). High-pressure synthesis of highly oxidized Ba0.5Sr0.5Co0.8Fe0.2O3−δcubic perovskite. Materials Chemistry Frontiers. 3(6). 1209–1217. 22 indexed citations
13.
Nishikubo, Takumi, Yuki Sakai, Kengo Oka, et al.. (2018). Optimized negative thermal expansion induced by gradual intermetallic charge transfer in Bi1− x Sb x NiO3. Applied Physics Express. 11(6). 61102–61102. 19 indexed citations
14.
Azuma, Masaki, Yuki Sakai, Takumi Nishikubo, et al.. (2018). Systematic charge distribution changes in Bi- and Pb-3d transition metal perovskites. Dalton Transactions. 47(5). 1371–1377. 10 indexed citations
15.
Kumada, Nobuhiro, Akira Miura, Takahiro Takei, et al.. (2016). High-Pressure Polymorph of NaBiO3. Inorganic Chemistry. 55(12). 5747–5749. 8 indexed citations
16.
Azuma, Masaki, et al.. (2015). Negative thermal expansion induced by intermetallic charge transfer. Science and Technology of Advanced Materials. 16(3). 34904–34904. 45 indexed citations
17.
Rubel, Mirza H. K., Akira Miura, Takahiro Takei, et al.. (2014). Superconducting Double Perovskite Bismuth Oxide Prepared by a Low‐Temperature Hydrothermal Reaction. Angewandte Chemie International Edition. 53(14). 3599–3603. 66 indexed citations
18.
Oka, Kengo, et al.. (2012). Polarization Rotation in the Monoclinic Perovskite BiCo1−xFexO3. Angewandte Chemie International Edition. 51(32). 7977–7980. 36 indexed citations
19.
Watanabe, Takayuki, Mikio Shimada, Toshiaki Aiba, et al.. (2011). Structural Transformation of Hexagonal (0001)BaTiO. Japanese Journal of Applied Physics. 50(9). 8 indexed citations
20.
Oka, Kengo, Masaki Azuma, Yasuo Narumi, et al.. (2007). Synthesis and Physical Property of Triangular Lattice Antiferromagnet InFe2O4. Journal of the Japan Society of Powder and Powder Metallurgy. 54(1). 53–57. 3 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by А. P. Tyutyunnik Breakdown of academic impact, for papers by S.Ya. Istomin Breakdown of academic impact, for papers by Atsushi Kitada Breakdown of academic impact, for papers by V. Siruguri Breakdown of academic impact, for papers by Antoine Villesuzanne Breakdown of academic impact, for papers by P. Dordor Breakdown of academic impact, for papers by Kun Lin Breakdown of academic impact, for papers by Florian Pielnhofer Breakdown of academic impact, for papers by Sudhindra Rayaprol Breakdown of academic impact, for papers by В.А. Черепанов
Rankless by CCL
2026