Antiferromagnetic magnetic transition and spin fluctuations in the deformed pyrochlore compound β -Fe2 (OH)3 Cl

M. Fujihala, M. Hagihala, X. G. Zheng, Tatsuya Kawae

研究成果: ジャーナルへの寄稿記事

17 引用 (Scopus)

抄録

Magnetism of the rhombohedral structure Fe2 (OH)3 Cl [β -Fe2(OH)3 Cl], a member of the geometric frustration series M2(OH)3 X where the magnetic ions form a deformed pyrochlore lattice, was studied using dc and ac susceptibilities, heat-capacity, neutron powder-diffraction, and muon spin relaxation (μSR) measurements. Antiferromagnetic transition was observed at TN =9.0 K with a much larger Curie-Weiss temperature θw of approximately -64 K, suggesting that Fe2 (OH)3 Cl is a geometrically frustrated magnet. Neutron-diffraction studies revealed the transition into a long-range antiferromagnetic order below TN =9.0 K with the Fe2 + spins on the triangular lattice planes disordered, and the other ones on the kagome lattice planes having frozen moments of less than 70% of the full Fe2+ moment. Spin fluctuations below TN were verified further using μSR studies. The magnetically phase-separated feature and the spin fluctuation coexisting with a long-range magnetic order are considered to be of great interest for studying geometric frustration and the behavior of S=2 spin systems on prochlore and kagome lattices.

元の言語英語
記事番号024425
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
82
発行部数2
DOI
出版物ステータス出版済み - 7 26 2010

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Spin fluctuations
Neutron powder diffraction
Magnetism
Neutron diffraction
Curie temperature
Specific heat
Magnets
Ions
frustration
moments
neutron diffraction
pyrochlore
muons
magnets
specific heat
magnetic permeability
neutrons
diffraction
ions

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

これを引用

Antiferromagnetic magnetic transition and spin fluctuations in the deformed pyrochlore compound β -Fe2 (OH)3 Cl. / Fujihala, M.; Hagihala, M.; Zheng, X. G.; Kawae, Tatsuya.

:: Physical Review B - Condensed Matter and Materials Physics, 巻 82, 番号 2, 024425, 26.07.2010.

研究成果: ジャーナルへの寄稿記事

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