Structure and Magnetic Properties of New Trigonal Iron-Boracite, Fe^sub 3^B^sub 7^O^sub 13^(OH)
The magnetic properties of a newly synthesized compound, ... (OH), are reported. The space group and lattice constants at room temperature are R 3 c H ( trigonal , #161), a = 8.590(3) A and c = 21.107(7) A. In this compound, three Fe 2+ ions form an equilateral triangular trimer sharing a hydroxide...
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Veröffentlicht in: | Journal of the Physical Society of Japan 2011-01, Vol.80 (1), p.1 |
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creator | Nomoto, Ippei Sato, Hirohiko Fukui, Tomoya Narumi, Yasuo Kindo, Koichi Nakamura, Shin Tsunoda, Yorihiko |
description | The magnetic properties of a newly synthesized compound, ... (OH), are reported. The space group and lattice constants at room temperature are R 3 c H ( trigonal , #161), a = 8.590(3) A and c = 21.107(7) A. In this compound, three Fe 2+ ions form an equilateral triangular trimer sharing a hydroxide ion, and the trimers further construct a trigonal lattice. The magnetic susceptibility exhibits an antiferromagnetic phase transition accompanied by a steep drop in susceptibility at T ...4.8 K under small magnetic fields. Mossbauer spectroscopy indicates that Fe ions are divalent. It also suggests a simple spin structure in which all of the spins are equally canted from the principal axis of the electric-field gradient below T ... This magnetic ground state is, however, easily destroyed by almost 1 T of magnetic field regardless of its direction. In addition to this transition, successive metamagnetic transitions are induced by larger magnetic fields. The additional transitions are strongly dependent on the direction of the applied magnetic field, resulting in a rich magnetic phase diagram. (ProQuest: ... denotes formulae/symbols omitted.) |
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(OH), are reported. The space group and lattice constants at room temperature are R 3 c H ( trigonal , #161), a = 8.590(3) A and c = 21.107(7) A. In this compound, three Fe 2+ ions form an equilateral triangular trimer sharing a hydroxide ion, and the trimers further construct a trigonal lattice. The magnetic susceptibility exhibits an antiferromagnetic phase transition accompanied by a steep drop in susceptibility at T ...4.8 K under small magnetic fields. Mossbauer spectroscopy indicates that Fe ions are divalent. It also suggests a simple spin structure in which all of the spins are equally canted from the principal axis of the electric-field gradient below T ... This magnetic ground state is, however, easily destroyed by almost 1 T of magnetic field regardless of its direction. In addition to this transition, successive metamagnetic transitions are induced by larger magnetic fields. The additional transitions are strongly dependent on the direction of the applied magnetic field, resulting in a rich magnetic phase diagram. 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(OH), are reported. The space group and lattice constants at room temperature are R 3 c H ( trigonal , #161), a = 8.590(3) A and c = 21.107(7) A. In this compound, three Fe 2+ ions form an equilateral triangular trimer sharing a hydroxide ion, and the trimers further construct a trigonal lattice. The magnetic susceptibility exhibits an antiferromagnetic phase transition accompanied by a steep drop in susceptibility at T ...4.8 K under small magnetic fields. Mossbauer spectroscopy indicates that Fe ions are divalent. It also suggests a simple spin structure in which all of the spins are equally canted from the principal axis of the electric-field gradient below T ... This magnetic ground state is, however, easily destroyed by almost 1 T of magnetic field regardless of its direction. In addition to this transition, successive metamagnetic transitions are induced by larger magnetic fields. The additional transitions are strongly dependent on the direction of the applied magnetic field, resulting in a rich magnetic phase diagram. 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subjects | Electric fields Ions Magnetic fields Phase transitions Spectrum analysis |
title | Structure and Magnetic Properties of New Trigonal Iron-Boracite, Fe^sub 3^B^sub 7^O^sub 13^(OH) |
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