| Project/Area Number |
01460258
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
結晶学
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| Research Institution | Tokyo University of Science |
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Principal Investigator |
ISHIDA K. Science Univ. of Tokyo, Dept. of Physics, Professor, 理工学部, 教授 (30012404)
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| Co-Investigator(Kenkyū-buntansha) |
MOMOZAWA N. Science Univ. of Tokyo, Dept. of Physics, Assistant, 理工学部, 助手 (60084464)
KATOH H. Science Univ. of Tokyo, Dept. of Physics, Assistant, 理工学部, 助手 (80084482)
UMEZAWA K. Science Univ. of Tokyo, Dept. of Physics, Assistant, 理工学部, 助手 (00084484)
MITA M. Science Univ. of Tokyo, Dept. of Physics, Professor, 理工学部, 教授 (50084439)
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| Project Period (FY) |
1989 – 1990
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| Project Status |
Completed (Fiscal Year 1991)
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| Budget Amount *help |
¥6,800,000 (Direct Cost: ¥6,800,000)
Fiscal Year 1990: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1989: ¥6,000,000 (Direct Cost: ¥6,000,000)
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| Keywords | Magnetic X-ray Scattering / Hexagonal Ferrite / Synchrotron Radiation / Spin Helical / Polarization Analyser / フェリ磁性 / 低温X線回折 / 低温試料台 |
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| Research Abstract |
The purpose of the present research is to detect magnetic X-ray scattering and to study the fine structure of hexagonal ferrite (Ba_<1-x>Sr_x)_2Zn_2Fe_<12>O_<22> using the magnetic X-ray scattering.
Single crystals of the liexagoiial ferrite (Ba_<1-x>Sr_x)_2Zn_2Fe_<12>O_<22>, x=0.748, were prepared by the flux method. The magnetic structure of the crystal is proper helix below the Neel temperature 337K. The temperature dependence of die period was determined by neutron diffraction. Since the period of the helix if incoinmeiisurate with the lattice, we attempt to observe weak peaks of magnetic X-ray scattering separately froin intensive ones of cliarge scattering (Thomson scattering). The X-ray experiment was carried out at BL-4C in Photon Factory of KEK. Being the incommensurate nature, magnetic satellites and charge peaks were observed separately at 50K. The observed period of the helix was in good agreemetit with that of neutroix diffraction. It is revealed that the angle resolution of the X-ray experiment is over 20 tunes higher than that of neutron one.
The polarization analysis of weak diffraction peaks at the forbidden reflection angle of the crystal structure indicated that the peaks miglit be due to cliarge-inagnetic interference scattering.
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