Faculty Database - OBARA Gaku

Books and Papers

Conference Presentations

Academic Qualifications

Research Topics, Consignment Studies & KAKENHI Researches

Current Specialized Field

（Last updated : 2025-02-25 18:51:34）

OBARA Gaku
Department Undergraduate School , School of Science and Technology

Position Associate Professor

■ Books and Papers

1.	2023/02	Article	Effects of La-Co Substitution and Ratio of Ba and Sr on Anisotropic Magnetic Field of Fe₂-W Ferrites Japan Society of Powder and Powder Metallurgy (Collaboration)
2.	2020/01	Article	Magnetic Domain Analysis of Ferrite-Sintered Magnets in Thermally Demagnetized and AC Demagnetized States Using Multiple Distances Observation of MFM and Image Processing IEEE Transactions on Magnetics Volume: 56(Issue: 4),pp.7516404 (Collaboration)
3.	2019/04	Article	Magnetic domain observation of ferrite sintered magnets using MFM images observed from multiple distances and image processing IEEE Trans. Magn 55(4),pp.6500504 (Collaboration)
4.	2018/09	Article	Influence of Oxygen Concentration during Semi-sintering on CrystallinePhase of Sr-Fe₂ W-type Ferrites J. Jpn. Soc. Powder Powder Metallurgy 65(9),pp.589-594 (Collaboration)
5.	2016/08	Article	Effects of Ca Excess Total Amount on the Magnetic and Physical Properties of Ca-La-Co Ferrite Sintered Magnets IEEJ Transaction on Fundamentals and Materials 136(8),pp.503-508 (Collaboration)
6.	2015/07	Article	Magnetic Properties of Ca-La-Co-Zn M-Type Ferrite Sintered Magnets J. Jpn. Soc. Powder Powder Metallurgy 62(7),pp.349-354 (Collaboration)
7.	2014/05	Article	Electrochemical Pseudo-Capacitance and Electric Reduction Treatment of Zn_xFe_3-xO₄ Spinel Ferrite Electrodes Journal of the Japan Society of powder and Powder Metallurgy 61(S1),pp.S93-S96 (Collaboration)
8.	2014/05	Article	Magnetic Properties of Ca-La-Co M-type Ferrite Sintered Magnets with CaO and SiO₂ Inter-additives Journal of the Japan Society of Powder and Powder Metallurgy 61(S1),pp.S258-S261 (Collaboration)
9.	2013/09	Article	Electrochemical Properties with Electrochemical Reduction of Fe₃O₄ Electrode Prepared by Chemical Coprecipitation IEEJ Transaction on Fundamentals and Materials 133(9),pp.484-488 (Collaboration)
10.	2012/03	Article	Electrochemical Properties of Mn-ferrite Electrodes for Redox Capacitors Journal of the Japan Society of Powder and powder Metallurgy pp.149-155 (Collaboration)
11.	2011/09	Article	Self-dhischarge of Electrochemical Capacitors with MnFe2O4 Electrodes pp.1-6 (Collaboration)
12.	2010/02	Article	Magnetic Properties of Ta(Fe1-xTx)2 with T=V, Cr, Mn, Co and Ni Journal of Physics: Conference Series，200， International Conference on Magnetism – ICM 2009 pp.032078 (Collaboration)
13.	2007/03	Article	Magnetic Properties of Nb(Fe1-xTx)2 with T=V, Cr, Mn, Co and Ni Journal of Magnetism and Magnetic Materials 310,pp.1812-1814 (Collaboration)
14.	2005/01	Article	Magnetic Properties of C14 Laves Phase Ti(Fe1-xTx)2 with T=Mn, Co and Ni (x≦0.6) Journal of Magnetism and Magnetic Materials 285,pp.28-38 (Collaboration)
15.	2002/02	Article	Magnetic properties of spark plasma sintering magnets using fine powders prepared by mechanical compounding method Journal of Magnetism and Magnetic Materials 239,pp.464-467 (Collaboration)
16.	2000/12	Article	Magnetic Properties of Sr-La-Co M-type Ferrite Fine Particles by Mechanical Compounding Method and Anisotropic Sintered Magnets Using These Fine Particles Ferrites: Proceedings of The Eighth International Conference on Ferrites (ICF8) pp.425-427 (Collaboration)
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■ Conference Presentations

1.	2024/07	Effects of Carbon Addition and Annealing before Sintering on Decomposition and Regeneration of W-type Phase during Sintering of W-type Ferrites (International Conference on Magnetism 2024)
2.	2019/10	Magnetic Domain Observation of Ferrite Magnets with MFM Images Obtained from Multiple Distances and Image Processing (12th International Conference on Ferrites)
3.	2018/05	Temperature Dependence of the Squareness Ratio of Ferrite Sintered Magnets (The 5th International Conference of Asian Union of Magnetics Societies)
4.	2014/08	Magnetic Properties of Pr-Ce-Fe-Co-B System Melt-Spun Ribbons (The 23rd International Workshop on Rare Earth and Future Permanent Magnets and Their Applications)
5.	2013/04	Electrochemical Pseudo-capacitance and Electric Reduction Treatment of Zn_xFe_3-xO₄ Spinel Ferrite Electrodes (The 11TH International Conference on Ferrites)
6.	2012/09/21	Electrochemical Capacitance and Reduction Treatments of Iron System Spinel Ferrite Electrodes
7.	2011/05/31	Electrochemical Properties of Mn-ferrite Electrodes for Redox Capacitors (Spring Meeting of Japan Society of Powder and powder Metallurgy, 2011)
8.	2009/07	Magnetic Properties of Ta(Fe1-xTx)2 with T=V, Cr, Mn, Co and Ni (International Conference on Magnetism – ICM 2009)
9.	2006/08	Magnetic Properties of Nb(Fe1-xTx)2 with T=V, Cr, Mn, Co and Ni (International Conference on Magnetism – ICM 2006)
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■ Academic Qualifications

2002/03/26
Degree Acquisition

Meiji University,

■ Research Topics, Consignment Studies & KAKENHI Researches

1.		Study of electrochemical capacitors (Key Word : electrochemical capacitor, redox, oxide)
2.		Study of ferrite parmanent magnets (Key Word : ferrite, M-type, spinel, coercive force, sturation magnetization, remanence)

■ Current Specialized Field

Electric and electronic materials