Recent developments in the magnetic study of the deformed pyrochlore lattice M2 (OH)3X (M = 3d magnetic ions, X = Cl, Br) - Exotic magnetic order in Ni2(OH)3Cl and controlled spinspin interactions in Co2(OH)3Cl1-xBrx and (Co1-xFex) 2(OH)3Cl

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

Research output: Contribution to journalConference article

15 Citations (Scopus)

Abstract

Following the discovery of frustrated magnetism in deformed pyrochlore lattice Cu2(OH)3Cl and Co2(OH)3Cl we have extensively investigated the material series in the chemical formula of M2 (OH)3X, with M = Cu, Co, Ni, Fe, Mn, and X = Cl, Br, or I. In atacamite-structure Ni2 (OH)3Cl, strong geometric frustration and an exotic antiferromagnetic transition below 5 K was found. While neutron diffraction witnessed unambiguously an antiferromagnetic long-range order, the μSR method can't see this order, instead, the detected local field behaved quite like a dynamically fluctuating one. For the system of Co2(OH)3Cl, the magnetic state is very sensitive to both the anion and cation substitution. While Co2(OH)3Cl behaves like a zero-field kagom ice ferromagnet, a completely substituted version of Co2(OH)3Br becomes antiferromagnetic although there is little difference in the crystal structure. The antiferromagnetic Co2(OH)3Br showed complicated magnetic transitions. Meanwhile, partially substituted Co2(OH)3Cl1-xBrx transforms from ferromagnetic to antiferromagnetic with increasing the x ratio. The results suggest that the interaction on the kagome-lattice plane is antiferromagnetic while that on the triangular lattice plane is ferromagnetic. For the substituted series (Co1-xFex)2(OH)3Cl a spin glass state is observed.

Original languageEnglish
Article number012034
JournalJournal of Physics: Conference Series
Volume145
Issue number1
DOIs
Publication statusPublished - Jan 1 2009
Event4th International Conference on Highly Frustrated Magnetism 2008, HFM 2008 - Braunschweig, Germany
Duration: Sep 7 2008Sep 12 2008

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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