Small Angle Neutron Scattering Study on Pr_<0.7>Ca_<0.3>MnO_3 : Evidence of Two-Phase Coexistence : Condensed Matter: Structure, etc.
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概要
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We observed small angle neutron scattering in Pr_<0.7>Ca<0.3>MnO_3 under two different magnetic fields, H = 0 and H = 1 T, focusing our attention on the lower angle region where the SANS spectra clearly show Porod-type Q-dependence. It is found that under ZFC (zero field cooling) condition, the system at low temperatures is in the state of 'two-phase coexistence' where FM (ferromagnetic metallic) microcluster with the average radius of R ~ 17nm are embedded on AFI (antiferromagnetic insulater) background. Upon application of magnetic field, the ferromagnetic clusters start to coalesque to form macroscopic domains with the size of order of 2 μm without changing the total volume of FM region appreciablly. These conclusions seem to provide rather clear picture for CMR effect in Pr_<0.7>Ca<0.3>MnO_3 as viewed from macroscopic standpoints.
- 社団法人日本物理学会の論文
- 2001-06-15
著者
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Yamada Y
Tohoku Univ. Sendai Jpn
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Yamada Y
Advanced Research Institute Waseda University:advanced Science Research Center Japan Atomic Energy R
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SUZUKI Jun-ichi
Advanced Science Research Center,Japan Atomic Energy Research Institute
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YAMADA Yasusada
Advanced Research Center for Science and Engineering,Waseda University
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Yamada Y
Nippondenso Co. Ltd. Nishio
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Suzuki J
Advanced Science Research Center Japan Atomic Energy Research Institute
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Suzuki Jun-ichi
Department Of Ophthalmology Sapporo Medical University School Of Medicine
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Suzuki Jun-ichi
Advanced Science Research Center Japan Atomic Energy Agency
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Yamada Y
Hosei Univ. Tokyo
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Yamada Y
Institute For Solid State Physics The University Of Tokyo
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Yamada Yasusada
Advanced Science Research Center Japan Atomic Energy Research Institutewaseda University
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Yamada Yuh
Department Of Metallurgical Engineering Nagoya Institute Of Technology
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Yamada Y
Advanced Research Center For Science And Engineering Waseda University
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Iwase Takeshi
Advanced Research Institute For Science And Engineering Waseda University
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Yamada Yasusada
Advanced Reserch Center For Science And Engineering
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WATAHIKI Masaya
Advanced Science Reseach Center, Japan Atomic Energy Reseach Institute
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Yamada Y
Department Of Physics Faculty Of Science Kyoto University
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Watahiki Masaya
Advanced Science Research Center Japan Atomic Energy Research Institute:japan Science And Technology
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Yamada Yasusada
Advanced Institute Of Science And Engineering Waseda University
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