Keiichi Koyama
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- Magnetic and transport properties of perovskites and related materials 127
- Magnetic Properties of Alloys 113
- Heusler alloys: electronic and magnetic properties 37
- Condensed Matter Physics top 1%
- Rare-earth and actinide compounds 107
- Advanced Condensed Matter Physics 30
- Physics of Superconductivity and Magnetism 27
- Materials Chemistry top 2%
- Shape Memory Alloy Transformations 43
- General Materials Science top 0.5%
- Mechanical Engineering top 5%
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- Magnetic properties of thin films 28
- Co-authors
- Kazuo WatanabeT. KanomataRyosuke KainumaYoshifuru MitsuiKatsunari OikawaRie Y. UmetsuWataru ItoKiyohito Ishida
- Journals
- Physical Review Letters (1 paper)Physical review. B, Condensed matter (8 papers)Applied Physics Letters (6 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
- Condensed Matter Physics 1000
- Materials Chemistry 2.0k
- General Materials Science 105
- Mechanical Engineering 612
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
The 25 scholars most cited alongside Keiichi Koyama, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.
All Works
| # | Work | ||
|---|---|---|---|
| 1 | 2025 | 0 | |
| 2 | 2024 | 0 | |
| 3 | 2023 | 0 | |
| 4 | 2023 | 1 | |
| 5 | 2020 | 2 | |
| 6 | Mn 2-x Ni 1+x Sbの磁気的および電気的性質 | 2014 | 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 | 2013 | 1 |
| 8 | Collapse of Magnetic Order of the Quasi One-Dimensional Ising-Like Antiferromagnet BaCo | 2013 | 1 |
| 9 | 2010 | 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 | 2009 | 12 |
| 11 | 2009 | 6 | |
| 12 | 2009 | 10 | |
| 13 | 2009 | 1 | |
| 14 | 2008 | 20 | |
| 15 | 2007 | 8 | |
| 16 | 2007 | 11 | |
| 17 | 2006 | 5 | |
| 18 | 2006 | 8 | |
| 19 | Oshikawa-Affleck electron spin resonance behavior observed in one-dimensional antiferromagnet BaCu2(Si1-xGe x)2O7 (x = 0.65) | 2005 | 1 |
| 20 | 1991 | 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), Rare-earth and actinide compounds (107 papers), Shape Memory Alloy Transformations (43 papers), Heusler alloys: electronic and magnetic properties (37 papers), Advanced Condensed Matter Physics (30 papers), Magnetic properties of thin films (28 papers) and Physics of Superconductivity and Magnetism (27 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.