K
Katsunari Oikawa
Researcher at Tohoku University
Publications - 234
Citations - 11555
Katsunari Oikawa is an academic researcher from Tohoku University. The author has contributed to research in topics: Magnetic shape-memory alloy & Phase (matter). The author has an hindex of 45, co-authored 224 publications receiving 10505 citations. Previous affiliations of Katsunari Oikawa include Industrial Research Institute & National Institute of Standards and Technology.
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Journal ArticleDOI
Magnetic-field-induced shape recovery by reverse phase transformation.
Ryosuke Kainuma,Y. Imano,Wataru Ito,Yuji Sutou,Haruhiko Morito,Satoshi Okamoto,Osamu Kitakami,Katsunari Oikawa,Asaya Fujita,Takeshi Kanomata,Kiyohito Ishida +10 more
TL;DR: The magnetic-field-induced shape recovery of a compressively deformed NiCoMnIn alloy is reported, attributing this deformation behaviour to a reverse transformation from the antiferromagnetic (or paramagnetic) martensitic to the ferromagnetic parent phase in the Ni45Co5Mn36.7In13.3 single crystal.
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Magnetic and martensitic transformations of NiMnX(X=In,Sn,Sb) ferromagnetic shape memory alloys
Yuji Sutou,Y. Imano,N. Koeda,Toshihiro Omori,Ryosuke Kainuma,Kiyohito Ishida,Katsunari Oikawa +6 more
TL;DR: Martensitic and magnetic transformations of the Heusler Ni50Mn50−yXy (X=In, Sn and Sb) alloys were investigated by differential scanning calorimetry measurement and the vibrating sample magnetometry technique.
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Cobalt-base high-temperature alloys
TL;DR: Cobalt-base superalloys showing a high-temperature strength greater than those of conventional nickel-basesuperalloys are identified and structures offering great promise as candidates for next-generation high-Temperature materials are identified.
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Metamagnetic shape memory effect in a Heusler-type Ni43Co7Mn39Sn11 polycrystalline alloy
Ryosuke Kainuma,Y. Imano,Wataru Ito,Haruhiko Morito,Yuji Sutou,Katsunari Oikawa,Asaya Fujita,Kiyohito Ishida,Satoshi Okamoto,Osamu Kitakami,Takeshi Kanomata +10 more
TL;DR: In this article, shape memory and magnetic properties of a Ni43Co7Mn39Sn11 Heusler polycrystalline alloy were investigated by differential scanning calorimetry, the sample extraction method, and the three-terminal capacitance method.
Journal ArticleDOI
Promising ferromagnetic Ni–Co–Al shape memory alloy system
Katsunari Oikawa,L. Wulff,Takashi Iijima,Fumihiko Gejima,Toshihiro Ohmori,Asaya Fujita,Kazuaki Fukamichi,Ryosuke Kainuma,Kiyohito Ishida +8 more
TL;DR: In this paper, a system of ferromagnetic β-phase Ni-Co-Al alloys with an ordered B2 structure that exhibits the shape memory effect has been developed.