Strategic Young Researcher Overseas Visits Programfor Accelerating Brain Circulation 2011
“Development of Young Researchers
Based on International Joint Research
on Green Energy Systems”
Progress Report

1. Name: Takeshi Yanai
2. Title: Assistant Professor
3. Host Institution: Monash University (Australia)
4. Host Researcher: Professor Kiyonori Suzuki
5. Duration: 25-Mar-2012 – 24-Mar-2013
6. Research Topic: Magnetic Materials
7. Overview of the Results of the Collaborative Research:
We prepared Fe-Ni films in organic-acid-based baths and evaluated their magnetic andstructural properties. It is found that the Fe content of the film depends markedly on the acidconcentration and low coercivity values of less than 30 A/m were realized at around 22 at.%of Fe. This magnetic softness is attainable in a wide range of film thickness between 20 and150 m. Cathode efficiencies of Fe-Ni films with Fe content of 22 at.% were approximately
80 % for each bath. Furthermore, high deposition rates of approximately 200 m/h wereobtained by increasing the current density during the deposition. From these results, weconcluded that the organic-acid-based baths are environmentally friendlier plating baths andsuitable for mass-production of magnetically soft Fe-Ni films.

8. Deployment Plans for Future Collaborative Research:
We mainly researched on soft magnetic materials in the period and have reported somepeer-reviewed papers. Our next target is hard magnetic materials and we will propose afabrication process of films for hard magnetic materials.

9.

List of Collaborative Research Progress:

Publication(s)1. T. Yanai, K. Shiraishi, T. Shimokawa, Y. Watanabe, T. Ohgai, M. Nakano, K. Suzuki
and H. Fukunaga, “Electroplated Fe films prepared from a deep eutectic solvent”,
Journal of Applied Physics, Vol. 115, No.17, 2014.5, pp. 17A344-1～3.
2. T. Yanai, T. Shimokawa, Y. Watanabe, T. Ohgai, M. Nakano, K. Suzuki and H.
Fukunaga, “Effect of current density on magnetic properties of electrodeposited Fe-Ni
films prepared in a citric-acid-based-bath”, Journal of Applied Physics, Vol. 115, No.17,2014.5, pp. 17A325-1～3.
3. T. Yanai, T. Shimokawa, Y.Watanabe, M. Nakano, K. Suzuki and H. Fukunaga,“Electrodeposited Fe-Ni films prepared in a citric-acid-based bath with different pHvalues”, IEEE Transactions on Magnetics, Vol. 50, No. 1, 2014.1, pp. 2000703-1～3.
4. T. Yanai, H. Uto, T. Shimokawa, M. Nakano, K. Suzuki and H. Fukunaga,“Electrodeposited Fe-Co films Prepared from a Citric-acid-based Plating Bath”, Journalof the Korean Physical Society, Vol. 62, No. 12, 2013.6, pp. 1966-1968.
5. T. Shimokawa, T. Yanai, K. Takahashi, M. Nakano, K. Suzuki and H. Fukunaga,“Electrodeposited Fe-Ni Films Prepared from a Tartaric-acid- based Bath”, Journal ofthe Korean Physical Society, Vol. 62, No. 12, 2013.6, pp. 1963-1965.
6. T. Shimokawa, T.Yanai, K. Takahashi, M. Nakano, K. Suzuki, and H. Fukunaga, “Soft
Magnetic Properties of Electrodeposited Fe-Ni Films Prepared in Citric Acid BasedBath”, IEEE Transactions on Magnetics, Vol. 48, No.11, 2012.11, pp. 2907～2909.

Conference Presentation(s)1. R. Parsons, T. Yanai, H. Kishimoto, A. Kato and K. Suzuki, “Effect of Si on thefield-induced magnetic anisotropy in Fe-rich nanocrystalline soft magnetic materials”,in The 58th Annual Magnetism and Magnetic Materials Conference (2013.11).

2. T. Yanai, T. Shimokawa, Y. Watanabe, M. Nakano, K. Suzuki, H. Fukunaga, “Magneticproperties of Fe films prepared from a deep eutectic solvent”, in The 58th Annual
Magnetism and Magnetic Materials Conference (2013.11).
3. T. Shimokawa, T. Yanai, Y. Watanabe, M. Nakano, K. Suzuki, H. Fukunaga, “Effect ofcurrent density on magnetic properties of electrodeposited thin Fe-Ni films prepared in acitric-acid-based bath”, in The 58th Annual Magnetism and Magnetic Materials
Conference (2013.11).
4. T. Yanai, T. Shimokawa, M. Nakano, K. Suzuki, H. Fukunaga, "Electrodeposited Fe-GaFilms", in The 3rd International Symposium on Advanced Magnetic Materials andApplications (2013.7).
5. T. Yanai, T. Shimokawa, Y.Watanabe, M. Nakano, K. Suzuki and H. Fukunaga,“Electrodeposited Fe-Ni films prepared in a citric-acid-based bath with different pHvalues, in The 3rd International Symposium on Advanced Magnetic Materials andApplications (2013.7).
6. T. Yanai, T. Kawaguchi, M. Nakano, K, Suzuki and H. Fukunaga, "Electrodeposited
Fe-Ga films prepared from citric acid based bath", in The 2nd International Conferenceof The Asian Union of Magnetic Societies (2012.10).
7. T. Yanai, H. Uto, T. Shimokawa, M. Nakano, K. Suzuki and H. Fukunaga,“Electrodeposited Fe-Co film prepared from citric acid-based plating bath”, in the 19thInternational Conference on Magnetism (2012.5).
8. T. Shimokawa, T. Yanai, K. Takahashi, M. Nakano, K. Suzuki and H. Fukunaga,“Investigation of electrodeposited FeNi film prepared from tartaric acid based bath”, inthe 19th International Conference on Magnetism (2012.5).