Drastic anion substitution effect in deformed pyrochlore lattice Co2(OH)3Cl1-xBrx

Masato Hagihala; X. G. Zheng; Tatsuya Kawae

doi:10.1016/j.physb.2008.11.101

Drastic anion substitution effect in deformed pyrochlore lattice Co₂(OH)₃Cl_1-xBr_x

Masato Hagihala, X. G. Zheng, Tatsuya Kawae

Applied Physics

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

As a part of an extensive study of the new geometric frustration series M₂(OH)₃X (M: 3d magnetic ion; X: halogen ion) on deformed pyrochlore lattice we have investigated in detail the magnetism of Co₂(OH)₃Cl_1-xBr_x, in which the magnetic state was found to be very sensitive to the anion substitution. Co₂(OH)₃Br was found to undergo antiferromagnetic transitions at T_N1=6.2 K and T_N2=4.8 K, respectively, which are contrasting as compared to the partial ferromagnetic state in Co₂(OH)₃Cl. Muon spin precession was observed with additional fast relaxation below T_N1, implying coexisting spin-fluctuation. Meanwhile, the partially substituted Co₂(OH)₃Cl_1-xBr_x transforms from ferromagnetic to antiferromagnetic by increasing the x ratio. The present work presents a unique system to investigate the critical role of the tetrahedral distortion in geometric frustration.

Original language	English
Pages (from-to)	671-673
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	404
Issue number	5-7
DOIs	https://doi.org/10.1016/j.physb.2008.11.101
Publication status	Published - Apr 15 2009

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/j.physb.2008.11.101

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title = "Drastic anion substitution effect in deformed pyrochlore lattice Co2(OH)3Cl1-xBrx",

abstract = "As a part of an extensive study of the new geometric frustration series M2(OH)3X (M: 3d magnetic ion; X: halogen ion) on deformed pyrochlore lattice we have investigated in detail the magnetism of Co2(OH)3Cl1-xBrx, in which the magnetic state was found to be very sensitive to the anion substitution. Co2(OH)3Br was found to undergo antiferromagnetic transitions at TN1=6.2 K and TN2=4.8 K, respectively, which are contrasting as compared to the partial ferromagnetic state in Co2(OH)3Cl. Muon spin precession was observed with additional fast relaxation below TN1, implying coexisting spin-fluctuation. Meanwhile, the partially substituted Co2(OH)3Cl1-xBrx transforms from ferromagnetic to antiferromagnetic by increasing the x ratio. The present work presents a unique system to investigate the critical role of the tetrahedral distortion in geometric frustration.",

author = "Masato Hagihala and Zheng, {X. G.} and Tatsuya Kawae",

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AU - Hagihala, Masato

AU - Zheng, X. G.

AU - Kawae, Tatsuya

PY - 2009/4/15

Y1 - 2009/4/15

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Drastic anion substitution effect in deformed pyrochlore lattice Co₂(OH)₃Cl_1-xBr_x

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