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Papers by Author: Yasuo Ito

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Synthetic Processes via Complex Precursors of Rare Earth Manganites with the Perovskite and its Related Structures

Authors: A. Shimono, Hirohisa Sato, K. Kawada-Wada, Yasuo Ito, Naoki Kamegashira

Abstract: A development of synthetic process via rare earth complex precursors was applied to a formation of rare earth manganites which can not be easily formed by conventional (normal) process. Several compounds of rare earth manganites with various structures were successfully synthesized by this method and their crystal structures were identified by powder X-ray diffractometry. Both of the orthorhombic and rhombohedral LaMnO₃ phases were prepared. LnMn₂ O₅ phase was more easily prepared by this method than by another method. The solid solution of (Sr,La)₂ MnO₄ phase for various compositions were tried to prepare a single phase, especially for a composition region Sr/La ratio < 1. since this phase is normally formed for only region of Sr/La ratio .. 1 by the solid state reaction method.

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Positron Annihilation in Polymers with Highly Developed Specific Surface

Authors: Victor P. Shantarovich, Takenori Suzuki, Chun Qing He, Nikolay Djourelov, I.B. Kevdina, V.A. Davankov, A.V. Pastukhov, Yasuo Ito

346

Application of Coincidence Doppler-Broadening Spectroscopy to Different Carbon Phases

Authors: Yutaka Ito, Nikolay Djourelov, Takenori Suzuki, Kenjiro Kondo, Yasuo Ito, Victor P. Shantarovich, Jun Onoe

310

Positron Annihilation Lifetime Measurement in Supercritical Fluid of N₂O

Authors: Kazushi Funakoshi, Yasushi Kino, Tsutomu Sekine, Hiroshi Kudo, Yasuo Ito, Takenori Suzuki

295

Carbon-Implanted Polyethylene Characterized by a Pulsed Slow-Positron Beam

Authors: Nikolay Djourelov, Takenori Suzuki, Chun Qing He, Yasuo Ito, Kalina Velitchkova, E. Hamada, Kenjiro Kondo

280

Adsorbed Hydrogen Effect of Reemitted Slow Positrons from Ni Surface

Authors: Teruo Wada, Yojiro Oishi, Ikuzo Kanazawa, Yoshitada Murata, Katsuyuki Fukutani, Yasuo Ito, F. Komori

413

Positronium as a Probe of Gas Permeability and Local Dynamics in Highly Plasticized State of Polymers

Authors: Akira Shimazu, Toshiji Kanaya, Tukasa Miyazaki, Shigeru Katayama, Yasuo Ito

249

Application of Positron Beam Doppler Broadening Technique to Radiation Effects in Ion-Irradiated Fe-Cu Alloys

Authors: Takeo Iwai, Yasuo Ito

120

Positron-Induced Ion-Desorption from the Oxidized Ni Surface

Authors: Y. Terashima, A. Ozaki, R. Arai, Ikuzo Kanazawa, Yasuo Ito, K. Fukutani, Y. Murata, F. Komori

526

The Estimation of the Vacancy-Type Defects Density in Thin Fe Film with Slow Positron Beam

Authors: T. Nagata, Y. Terashima, Koji Takagi, Takahiro Kawai, Ikuzo Kanazawa, Ryoichi Suzuki, Toshiyuki Ohdaira, F. Komori, Yasuo Ito

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