Keiichi Koyama
- Electronic, Optical and Magnetic Materials top 0.5%
- Materials Chemistry top 2%
- Condensed Matter Physics top 1%
- Mechanical Engineering top 5%
- Atomic and Molecular Physics, and Optics top 5%
- Co-authors
- Kazuo WatanabeT. KanomataRyosuke KainumaYoshifuru MitsuiKatsunari OikawaRie Y. UmetsuWataru ItoKiyohito Ishida
- Topics
- Magnetic and transport properties of perovskites and related materials (127 papers)Magnetic Properties of Alloys (113 papers)Rare-earth and actinide compounds (107 papers)
- Partner nations
- JapanUnited StatesChina
In The Last Decade
Keiichi Koyama
273 papers receiving 3.6k citations
Peers
Comparison fields: 5 of 83
- Electronic, Optical and Magnetic Materials 2.8k
- Materials Chemistry 2.0k
- Condensed Matter Physics 1000
- Mechanical Engineering 612
- Atomic and Molecular Physics, and Optics 443
Countries citing papers authored by Keiichi Koyama
This map shows the geographic impact of Keiichi Koyama'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 Keiichi Koyama with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Keiichi Koyama more than expected).
Fields of papers citing papers by Keiichi Koyama
This network shows the impact of papers produced by Keiichi Koyama. 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 Keiichi Koyama. The network helps show where Keiichi Koyama may publish in the future.
Co-authorship network of co-authors of Keiichi Koyama
This figure shows the co-authorship network connecting the top 25 collaborators of Keiichi Koyama. A scholar is included among the top collaborators of Keiichi Koyama 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 Keiichi Koyama. Keiichi Koyama is excluded from the visualization to improve readability, since they are connected to all nodes in the network.
All Works
| # | Work | Indexed citations |
|---|---|---|
| 1 | 0 | |
| 2 | 0 | |
| 3 | 0 | |
| 4 | 1 | |
| 5 | 2 | |
| 6 | Mn 2-x Ni 1+x Sbの磁気的および電気的性質 | 1 |
| 7 | 横方向磁場中の準1次元Ising型反強磁性体BaCo 2 V 2 O 8 の磁気秩序の崩壊 | 1 |
| 8 | Collapse of Magnetic Order of the Quasi One-Dimensional Ising-Like Antiferromagnet BaCo | 1 |
| 9 | 4 | |
| 10 | ホイスラー化合物Ru 2-x Fe x CrSiにおける強磁性およびスピンガラス転移 | 12 |
| 11 | 6 | |
| 12 | 10 | |
| 13 | 1 | |
| 14 | 20 | |
| 15 | 8 | |
| 16 | 11 | |
| 17 | 5 | |
| 18 | 8 | |
| 19 | Oshikawa-Affleck electron spin resonance behavior observed in one-dimensional antiferromagnet BaCu2(Si1-xGe x)2O7 (x = 0.65) | 1 |
| 20 | 3 |
About Keiichi Koyama
Keiichi Koyama is a scholar working on Electronic, Optical and Magnetic Materials, Condensed Matter Physics and General Materials Science, having authored 286 papers that have together received 3.6k indexed citations. Recurring topics across this work include Magnetic and transport properties of perovskites and related materials (127 papers), Magnetic Properties of Alloys (113 papers) and Rare-earth and actinide compounds (107 papers). The work is most often cited by research in Electronic, Optical and Magnetic Materials (2.8k citations), Condensed Matter Physics (1000 citations) and Materials Chemistry (2.0k citations). Keiichi Koyama has collaborated with scholars based in Japan, United States and China. Frequent co-authors include Kazuo Watanabe, T. Kanomata, Ryosuke Kainuma, Yoshifuru Mitsui, Katsunari Oikawa, Rie Y. Umetsu, Wataru Ito, Kiyohito Ishida, K. Takenaka and A. Fujita. Their work appears in journals such as Physical Review Letters, Physical review. B, Condensed matter and Applied Physics Letters.
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.