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oai:fit.repo.nii.ac.jp:00000451 2023-05-15T13:48:14Z 256:257:301

パイロクロアヨウ アタカマイト Mn2Cl(OH)₃ ノ プロトン NMR パイロクロア様アタカマイトMn2Cl(OH)₃のプロトンNMR Proton NMR Study of Pyrochlore Like Atacamite Mn2Cl(OH)₃ 善明, 和子 2137 久保, 英範 2138 時田, 正彦 2139 浜崎, 達一 2140 萩原, 雅人 2141 鄭, 旭光 2142 NMR Mn2Cl(OH)₃ pyrochlore geometric frustration atacamite NMR Mn2Cl(OH)₃ pyrochlore geometric frustration atacamite application/pdf 論文(Article) The proton NMR spectrum of Mn₂Cl(OH)₃ at low temperature with zero external field has rather sharp peaks and the glassy property is not found. This result means that almost all magnetic moments order antiferromagnetically at low temperature. The magnetic structure determined by comparison with the observed proton NMR spectrum and the numerical calculated ones of various magnetic models shows that the magnetic moments do not order all-in all-out orienting to body center like antiferromagnetic pyrochlore, but also not parallel to the local crystal field. The coexistence of antiferromagnetic moments and the spin-glass moments dose not reproduce the observed NMR spectrum. Our result suggests that the magnetic structure of atacamite Mn₂Cl(OH)₃ is different from the pyrochlore one, although it is similar to geometrically frustrated pyrochlores in crystal structure. departmental bulletin paper 福岡工業大学 2010-02-28 VoR application/pdf 福岡工業大学研究論集 2 42 115 122 02876620 AN10036974 https://fit.repo.nii.ac.jp/record/451/files/11478-987_p115時田　正彦.pdf http://hdl.handle.net/11478/987 https://fit.repo.nii.ac.jp/records/451 jpn