Ken‐ichi Machida

6.8k total citations · 1 hit paper
195 papers, 6.1k citations indexed

About

Ken‐ichi Machida is a scholar working on Materials Chemistry, Electronic, Optical and Magnetic Materials and Electrical and Electronic Engineering. According to data from OpenAlex, Ken‐ichi Machida has authored 195 papers receiving a total of 6.1k indexed citations (citations by other indexed papers that have themselves been cited), including 127 papers in Materials Chemistry, 77 papers in Electronic, Optical and Magnetic Materials and 37 papers in Electrical and Electronic Engineering. Recurrent topics in Ken‐ichi Machida's work include Luminescence Properties of Advanced Materials (54 papers), Magnetic Properties of Alloys (46 papers) and Electromagnetic wave absorption materials (26 papers). Ken‐ichi Machida is often cited by papers focused on Luminescence Properties of Advanced Materials (54 papers), Magnetic Properties of Alloys (46 papers) and Electromagnetic wave absorption materials (26 papers). Ken‐ichi Machida collaborates with scholars based in Japan, China and Australia. Ken‐ichi Machida's co-authors include Masahiro Itoh, Gin‐ya Adachi, Takashi Horikawa, Hiromasa Hanzawa, Xianqing Piao, Jiu Rong Liu, Michio Enyo, Toshiyuki Masui, Kuniaki Murase and Naoto Kijima and has published in prestigious journals such as Applied Physics Letters, Journal of Applied Physics and Chemistry of Materials.

In The Last Decade

Ken‐ichi Machida

194 papers receiving 5.9k 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.

Preparation of CaAlSiN₃:Eu²⁺ Phosphors by the Self-Propagating High-Temperature Synthesis and Their Luminescent Properties

2007 522 citations Ken‐ichi Machida, Takashi Horikawa et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Ken‐ichi Machida Japan	40	4.2k	2.0k	1.6k	934	915	195	6.1k
P. Ravindran India	45	6.2k 1.5×	2.4k 1.2×	1.6k 1.0×	329 0.4×	600 0.7×	184	8.1k
Claudia Zlotea France	38	3.9k 0.9×	598 0.3×	472 0.3×	558 0.6×	932 1.0×	111	4.9k
Guillaume Viau France	43	3.3k 0.8×	2.6k 1.3×	1.3k 0.8×	911 1.0×	245 0.3×	129	6.1k
A. Percheron‐Guégan France	43	4.9k 1.2×	1.3k 0.6×	740 0.5×	406 0.4×	1.4k 1.5×	219	6.2k
Vei Wang China	21	4.4k 1.1×	769 0.4×	2.3k 1.5×	1.7k 1.8×	711 0.8×	53	6.0k
G. N. Subbanna India	35	3.2k 0.8×	1.3k 0.7×	964 0.6×	1.1k 1.1×	678 0.7×	112	4.5k
Jason Graetz United States	38	3.3k 0.8×	907 0.5×	3.5k 2.2×	227 0.2×	1.5k 1.6×	87	6.5k
Lyubov G. Bulusheva Russia	39	5.0k 1.2×	1.6k 0.8×	2.6k 1.7×	1.0k 1.1×	285 0.3×	266	7.1k
Bernd Spliethoff Germany	48	5.3k 1.3×	1.6k 0.8×	1.4k 0.9×	1.4k 1.4×	1.6k 1.7×	88	7.8k
F. Fiévet France	29	2.9k 0.7×	2.0k 1.0×	1.6k 1.0×	1.2k 1.3×	174 0.2×	41	4.8k

Countries citing papers authored by Ken‐ichi Machida

Since Specialization

Citations

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

Fields of papers citing papers by Ken‐ichi Machida

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ken‐ichi Machida. 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 Ken‐ichi Machida. The network helps show where Ken‐ichi Machida may publish in the future.

Co-authorship network of co-authors of Ken‐ichi Machida

This figure shows the co-authorship network connecting the top 25 collaborators of Ken‐ichi Machida. A scholar is included among the top collaborators of Ken‐ichi Machida 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 Ken‐ichi Machida. Ken‐ichi Machida 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

Nishio, Hiroaki, et al.. (2021). Magnetic Properties and Magnetic Domain Observation of Nd–Fe–B Sintered Magnets Treated by Grain Boundary Diffusion Process with Dy–Al Co-Sorption. MATERIALS TRANSACTIONS. 62(8). 1216–1224. 5 indexed citations

Nishio, Hiroaki, et al.. (2020). Magnetic Properties of Nd–Fe–B Sintered Magnets Produced by Reduction-Grain Boundary Diffusion Process with Heavy Rare-Earths Compounds and Ca Metal Vapor. MATERIALS TRANSACTIONS. 61(4). 782–786. 7 indexed citations

Nishio, Hiroaki, Ken‐ichi Machida, & Kimihiro Ozaki. (2016). More Accurate Hysteresis Curve for Large Nd–Fe–B Sintered Magnets Employing a Superconducting Magnet-Based Vibrating Sample Magnetometer. IEEE Transactions on Magnetics. 53(4). 1–6. 15 indexed citations

Machida, Ken‐ichi, et al.. (2015). Luminescence properties of CaAlSiN3:Eu2+ phosphor prepared by direct-nitriding method using fine metal hydride powders. Journal of Alloys and Compounds. 633. 97–103. 74 indexed citations

Machida, Ken‐ichi, et al.. (2013). Carbothermal Reduction Synthesis Using CaCN2 as Calcium and Carbon Sources for CaAlSiN3:Eu2+ Phosphor and Their Luminescence Properties. Chemistry Letters. 43(4). 533–534. 19 indexed citations

Horikawa, Takashi, et al.. (2012). Luminescence properties of CaAlSiN₃:Eu²⁺mixed nitrides prepared by carbothermal process. Journal of Physics Conference Series. 379. 12016–12016. 11 indexed citations

Wang, Fenglong, Jiurong Liu, Jing Kong, et al.. (2011). Template free synthesis and electromagnetic wave absorption properties of monodispersed hollow magnetite nano-spheres. Journal of Materials Chemistry. 21(12). 4314–4314. 161 indexed citations

Itoh, Masahiro, et al.. (2010). Broadband electromagnetic wave absorbers prepared by grading magnetic powder density. Journal of Applied Physics. 108(6). 22 indexed citations

Saitô, Makoto, et al.. (2007). Effective Suppression of Hydrogen Poisoning from a Ru-Based Catalyst in a Ag–Pd Membrane Reactor. Bulletin of the Chemical Society of Japan. 80(8). 1630–1634. 3 indexed citations

10.

Saitô, Makoto, et al.. (2006). Synergistic Effect of MgO and CeO2 as a Support for Ruthenium Catalysts in Ammonia Synthesis. Catalysis Letters. 106(3-4). 107–110. 57 indexed citations

11.

Horikawa, Takashi, Kouji Miura, Masahiro Itoh, & Ken‐ichi Machida. (2005). Effective recycling for Nd–Fe–B sintered magnet scraps. Journal of Alloys and Compounds. 408-412. 1386–1390. 32 indexed citations

12.

Itoh, Masahiro, Masahiro Masuda, Shunji Suzuki, & Ken‐ichi Machida. (2004). Recycle for sludge scrap of Nd-Fe-B sintered magnet as isotropic bonded magnet. Journal of Rare Earths. 22(1). 168–171. 13 indexed citations

13.

Kawasaki, Takashi, Masahiro Itoh, & Ken‐ichi Machida. (2003). Reproduction of Nd-Fe-B Sintered Magnet Scraps Using a Binary Alloy Blending Technique. MATERIALS TRANSACTIONS. 44(9). 1682–1685. 18 indexed citations

14.

Liu, Jiu Rong, Masahiro Itoh, & Ken‐ichi Machida. (2003). GHz Range Absorption Properties of α-Fe/Y2O3 Nanocomposites Prepared by Melt-spun Technique. Chemistry Letters. 32(4). 394–395. 71 indexed citations

15.

Itoh, Masahiro, Masahiro Masuda, & Ken‐ichi Machida. (2002). Hydrogen Generation by Ammonia Cracking with Iron Metal-Rare Earth Oxide Composite Catalyst. MATERIALS TRANSACTIONS. 43(11). 2763–2767. 31 indexed citations

16.

Machida, Ken‐ichi, et al.. (1999). Preparation and Magnetic Property of Sm2Fe17Nx Fine Powders Sorbed by Zinc Vapor. Chemistry Letters. 28(7). 555–556. 1 indexed citations

17.

Machida, Ken‐ichi, Daisuke Ueda, Satoshi Inoue, & Gin‐ya Adachi. (1999). Reversible Valence Change of the Europium Ion Doped in Alkaline-earth Tetraborates. Chemistry Letters. 28(8). 785–786. 9 indexed citations

18.

Itoh, Masahiro, et al.. (1999). Nitrogenation and Hydrogenation Characteristics of Transition Metal−Iron Intermetallic Compounds. The Journal of Physical Chemistry B. 103(44). 9498–9504. 15 indexed citations

19.

Machida, Ken‐ichi, et al.. (1993). Preparation and Magnetic Property of Sintered Sm₂Fe₁₇N_xMaterials under High-Pressure Conditions. Japanese Journal of Applied Physics. 32(6B). L837–L837. 1 indexed citations

20.

Machida, Ken‐ichi & Michio Enyo. (1990). Structural and Electrochromic Properties of Tungsten and Molybdenum Trioxide Electrodes in Acidic Media. Journal of The Electrochemical Society. 137(4). 1169–1175. 63 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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