K
K. Kitazawa
Researcher at University of Tokyo
Publications - 175
Citations - 3865
K. Kitazawa is an academic researcher from University of Tokyo. The author has contributed to research in topics: Superconductivity & Magnetic field. The author has an hindex of 33, co-authored 161 publications receiving 3679 citations. Previous affiliations of K. Kitazawa include Osaka University & Norwegian Institute of Technology.
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Journal ArticleDOI
Critical currents and flux creep in melt processed high Tc oxide superconductors
Masato Murakami,Satoshi Gotoh,N. Koshizuka,S. Tanaka,Teruo Matsushita,Shinsaku Kambe,K. Kitazawa +6 more
TL;DR: In this paper, a theoretical estimation of the contribution of 211 precipitates to flux pinning is also presented, and a value of pinning energy, U, comparable to that of conventional superconductors is obtained.
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Crystal structure and magnetic properties of hexagonal RMnO3 (R = Y, Lu, and Sc) and the effect of doping
Takuro Katsufuji,M. Masaki,Akihiko Machida,M. Moritomo,Kenichi Kato,Eiji Nishibori,Masaki Takata,Makoto Sakata,Kenji Ohoyama,K. Kitazawa,H. Takagi +10 more
TL;DR: In this paper, it was found from x-ray diffraction measurements that the ferroelectric polarization originates from the tilting of polyhedra and buckling of R layers, which persists up to 1000 K.
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Violation of Kohler's rule in the normal-state magnetoresistance of YBa2Cu3O7- delta and La2SrxCuO4.
TL;DR: In this paper, it was shown that the temperature dependence of the normal-state magnetoresistance (MR) in these cuprates is related to the Hall angle of the Fermi surface.
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Giant magnetostriction in Bi2Sr2CaCu2O8 single crystal in the superconducting state and its mechanism.
TL;DR: A quantitative model has been proposed which accounts for the magnetostriction in terms of internal forces arising from flux pinning.
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Observation of individual vortices trapped along columnar defects in high-temperature superconductors
Akira Tonomura,Hiroto Kasai,Osamu Kamimura,Tsuyoshi Matsuda,Ken Harada,Y. Nakayama,Jun-ichi Shimoyama,K. Kishio,Tetsuo Hanaguri,K. Kitazawa,Masato Sasase,Satoru Okayasu +11 more
TL;DR: This work achieves the resolution required to image vortex lines and columnar defects in Bi2Sr2CaCu2O8+δ (Bi-2212) thin films, using a 1-MV field-emission electron microscope and finds that the vortex lines at higher temperatures are trapped and oriented along tiltedColumnar defects, irrespective of the orientation of the applied magnetic field.