Keiji Takeda

404 total citations
26 papers, 333 citations indexed

About

Keiji Takeda is a scholar working on Electronic, Optical and Magnetic Materials, Materials Chemistry and Organic Chemistry. According to data from OpenAlex, Keiji Takeda has authored 26 papers receiving a total of 333 indexed citations (citations by other indexed papers that have themselves been cited), including 15 papers in Electronic, Optical and Magnetic Materials, 13 papers in Materials Chemistry and 5 papers in Organic Chemistry. Recurrent topics in Keiji Takeda's work include Magnetism in coordination complexes (13 papers), Lanthanide and Transition Metal Complexes (8 papers) and Organic and Molecular Conductors Research (5 papers). Keiji Takeda is often cited by papers focused on Magnetism in coordination complexes (13 papers), Lanthanide and Transition Metal Complexes (8 papers) and Organic and Molecular Conductors Research (5 papers). Keiji Takeda collaborates with scholars based in Japan, United States and Taiwan. Keiji Takeda's co-authors include Kunio Awaga, Ffrancon Williams, Yoshihito SUZUKI, Tamotsu Inabe, Ilya A. Shkrob, Akira Yamaguchi, Hidehiko Ishimoto, Takayoshi Nakamura, Hiroyuki Tajima and Hiroshi Sawa and has published in prestigious journals such as The Journal of Chemical Physics, Physical review. B, Condensed matter and Journal of Applied Physics.

In The Last Decade

Keiji Takeda

26 papers receiving 322 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Keiji Takeda Japan 11 215 192 60 52 50 26 333
J. Nicholas B. Smith United Kingdom 10 269 1.3× 157 0.8× 62 1.0× 74 1.4× 29 0.6× 16 356
Graham Carver Switzerland 14 291 1.4× 254 1.3× 123 2.0× 45 0.9× 34 0.7× 21 400
Gerald V. Rubenacker United States 11 192 0.9× 163 0.8× 116 1.9× 30 0.6× 32 0.6× 19 355
J. Pietrzak Poland 11 125 0.6× 200 1.0× 39 0.7× 56 1.1× 27 0.5× 57 332
Mitsuo Ohama Japan 9 219 1.0× 263 1.4× 145 2.4× 61 1.2× 42 0.8× 15 417
Ildar Bikchantaev Russia 6 264 1.2× 253 1.3× 63 1.1× 91 1.8× 20 0.4× 8 362
L. Toupet France 10 239 1.1× 151 0.8× 81 1.4× 102 2.0× 17 0.3× 37 361
Christopher I. Gregory United Kingdom 8 371 1.7× 157 0.8× 79 1.3× 84 1.6× 81 1.6× 8 460
L. Tinchurina Russia 3 260 1.2× 248 1.3× 60 1.0× 91 1.8× 16 0.3× 4 354
I. Ledoux France 6 265 1.2× 138 0.7× 54 0.9× 114 2.2× 64 1.3× 8 369

Countries citing papers authored by Keiji Takeda

Since Specialization
Citations

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

Fields of papers citing papers by Keiji Takeda

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Keiji Takeda

This figure shows the co-authorship network connecting the top 25 collaborators of Keiji Takeda. A scholar is included among the top collaborators of Keiji Takeda 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 Keiji Takeda. Keiji Takeda 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.
Takeda, Keiji. (2019). Magnetic properties of Nd-Fe-B sintered magnet for the variable magnetic force motor. 1 indexed citations
2.
Shimizu, Akihiro, et al.. (2015). Generation, Characterization, and Reactions of Thionium Ions Based on the Indirect Cation Pool Method. Bulletin of the Chemical Society of Japan. 89(1). 61–66. 12 indexed citations
3.
Nokami, Toshiki, Tatsuya Morofuji, Keiji Takeda, et al.. (2014). Redox active dendronized polystyrenes equipped with peripheral triarylamines. Beilstein Journal of Organic Chemistry. 10. 3097–3103. 8 indexed citations
4.
Takeda, Keiji, Hiroko Tokoro, Akira Yamaguchi, & Shin‐ichi Ohkoshi. (2010). Absolute quantification of the magnetization of individual micron-sized magnets using a high-temperature superconductor micro-SQUID magnetometer. Superconductor Science and Technology. 23(4). 45006–45006. 1 indexed citations
5.
Takeda, Keiji, Hiroko Tokoro, Fumiyoshi Hakoe, et al.. (2008). High temperature superconductor micro SQUID magnetometer for molecular-based magnets. Polyhedron. 28(9-10). 1746–1749. 1 indexed citations
6.
Takeda, Keiji, Hatsumi Mori, Akira Yamaguchi, et al.. (2008). Fabrication of a high temperature superconductor micro-superconducting-quantum-interference-device magnetometer for magnetic hysteresis measurements. Journal of Applied Physics. 103(7). 3 indexed citations
7.
Awaga, Kunio, et al.. (2006). Magneto-structural correlation in the Jahn–Teller isomers of Mn12. Journal of Materials Chemistry. 16(26). 2516–2521. 27 indexed citations
8.
SUZUKI, Yoshihito, Keiji Takeda, & Kunio Awaga. (2003). Enhancement of Jahn-Teller isomerism inMn12Acunder high quasi-hydrostatic pressure. Physical review. B, Condensed matter. 67(13). 24 indexed citations
9.
Shkrob, Ilya A., Keiji Takeda, & Ffrancon Williams. (2002). Electron Localization in Solid Acetonitrile. The Journal of Physical Chemistry A. 106(39). 9132–9144. 25 indexed citations
10.
Takeda, Keiji, Kunio Awaga, Tamotsu Inabe, et al.. (2002). Magnetic anisotropy, tunneling effects, high-frequency EPR, and molecular structure of fast-relaxation species ofMn12. Physical review. B, Condensed matter. 65(9). 30 indexed citations
11.
Goto, Takao, et al.. (2000). 55Mn NMR and relaxation studies on Mn12-acetate. Physica B Condensed Matter. 284-288. 1227–1228. 17 indexed citations
12.
Takeda, Keiji, Kunio Awaga, & Tamotsu Inabe. (1998). Crystal structure and magnetic properties of [Mn12O12(O2CPh)16(H2O)4]⋅2(PhCO2H):Evidence of domain formation with different blocking temperatures. Physical review. B, Condensed matter. 57(18). R11062–R11064. 21 indexed citations
13.
Awaga, Kunio, Keiji Takeda, Akira Yamaguchi, et al.. (1997). Unusual crystal structures and magnetic properties of nitronylnitroxide radical ions. Synthetic Metals. 85(1-3). 1643–1646. 2 indexed citations
14.
Takeda, Keiji & Kunio Awaga. (1997). Magnetic properties of(m−MPYNN+)[Mn12O12(O2CPh)16(H2O)4]−: Enhancement of magnetic relaxation in theMn12cluster caused by the organic radical. Physical review. B, Condensed matter. 56(22). 14560–14565. 59 indexed citations
15.
Gillbro, Tomas, Keiji Takeda, & Ffrancon Williams. (1974). Proton hyperfine structure in the electron spin resonance spectrum of the acetonitrile dimer radical anion. Journal of the Chemical Society Faraday Transactions 2 Molecular and Chemical Physics. 70. 465–465. 3 indexed citations
16.
Sprague, Estel D., Keiji Takeda, Jih Tzong Wang, & Ffrancon Williams. (1974). Structure and Reactivity of Methyl Radical — Cyanide Ion Pairs in Crystal I and Crystal II of Acetonitrile. Canadian Journal of Chemistry. 52(15). 2840–2844. 13 indexed citations
17.
Takeda, Keiji, et al.. (1973). Luminescence induced by crystallization of organic binary mixtures. The Journal of Physical Chemistry. 77(18). 2165–2171. 9 indexed citations
18.
Williams, Ffrancon & Keiji Takeda. (1970). Reversibility between the electron-excess center, e-(CH3CN)2, and methyl radicals in .gamma.-irradiated acetonitrile-h3. The Journal of Physical Chemistry. 74(22). 4007–4008. 10 indexed citations
19.
Bonin, Michael A., Keiji Takeda, & Ffrancon Williams. (1969). Anisotropy of Nitrogen Hyperfine Coupling and g Factor in the ESR Spectra of Trapped Electrons in Gamma-Irradiated Crystalline Organic Cyanides. The Journal of Chemical Physics. 50(12). 5423–5424. 10 indexed citations
20.
Takeda, Keiji, Hiroshi Yoshida, Koichiro Hayashi, & Seizô Okamura. (1966). Electron spin resonance study of radiation‐induced solid‐state polymerization of conjugated dienes. Journal of Polymer Science Part A-1 Polymer Chemistry. 4(10). 2710–2713. 7 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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