Spin order in the Heisenberg kagome antiferromagnet MgF e3(OH)6 C l2

M. Fujihala; X. G. Zheng; Sanghyun Lee; T. Kamiyama; Akira Matsuo; Koichi Kindo; T. Kawae

doi:10.1103/PhysRevB.96.144111

Spin order in the Heisenberg kagome antiferromagnet MgF e3(OH)6 C l2

M. Fujihala, X. G. Zheng, Sanghyun Lee, T. Kamiyama, Akira Matsuo, Koichi Kindo, T. Kawae

Applied Physics

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

4 Citations (Scopus)

Abstract

Spin behaviors on kagome lattices have received increased attention because of their exotic magnetic states. Here, we report magnetic ordering in the S=2 kagome antiferromagnet MgFe3(OH)6Cl2. The compound has been synthesized by selectively replacing the magnetic ions in the triangular planes of its parent compound of deformed pyrochlore Fe2(OH)3Cl with nonmagnetic Mg. Whereas Fe2(OH)3Cl showed antiferromagnetic order below TN=8.5K with persistent spin fluctuations, MgFe3(OH)6Cl2 showed an antiferromagnetic transition at an enhanced TN value of 9.9 K. Susceptibility, high-field magnetization, and neutron-diffraction studies suggest that MgFe3(OH)6Cl2 is a Heisenberg-like spin system with a 120° nearest-neighbor spin structure confined in the kagome plane and spin-vector chirality of q=-1 below TN. Muon spin-rotation/-relaxation studies demonstrate that the persisting spin fluctuations are suppressed relative to Fe2(OH)3Cl. The present paper reports the experimental realization of an S=2 kagome antiferromagnet, highlighting a real system with a quasiclassical Heisenberg spin, which may also be a valuable reference system for quantum Heisenberg kagome antiferromagnets.

Original language	English
Article number	144111
Journal	Physical Review B
Volume	96
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.96.144111
Publication status	Published - Oct 24 2017

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.96.144111

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@article{59baa8f612ef4fc7a7ea63b7c4ee3db1,

title = "Spin order in the Heisenberg kagome antiferromagnet MgF e3(OH)6 C l2",

abstract = "Spin behaviors on kagome lattices have received increased attention because of their exotic magnetic states. Here, we report magnetic ordering in the S=2 kagome antiferromagnet MgFe3(OH)6Cl2. The compound has been synthesized by selectively replacing the magnetic ions in the triangular planes of its parent compound of deformed pyrochlore Fe2(OH)3Cl with nonmagnetic Mg. Whereas Fe2(OH)3Cl showed antiferromagnetic order below TN=8.5K with persistent spin fluctuations, MgFe3(OH)6Cl2 showed an antiferromagnetic transition at an enhanced TN value of 9.9 K. Susceptibility, high-field magnetization, and neutron-diffraction studies suggest that MgFe3(OH)6Cl2 is a Heisenberg-like spin system with a 120° nearest-neighbor spin structure confined in the kagome plane and spin-vector chirality of q=-1 below TN. Muon spin-rotation/-relaxation studies demonstrate that the persisting spin fluctuations are suppressed relative to Fe2(OH)3Cl. The present paper reports the experimental realization of an S=2 kagome antiferromagnet, highlighting a real system with a quasiclassical Heisenberg spin, which may also be a valuable reference system for quantum Heisenberg kagome antiferromagnets.",

author = "M. Fujihala and Zheng, {X. G.} and Sanghyun Lee and T. Kamiyama and Akira Matsuo and Koichi Kindo and T. Kawae",

note = "Funding Information: This work is supported by a Grant-in-Aid for Scientific Research (B) to X.G.Z. (Grants No. 19340100 and No. 26289092) from the Japan Society for the Promotion of Science (JSPS) and a Grant-in-Aid for Scientific Research on Priority Areas to X.G.Z. (Grants No. 20046012 and No. 22014008) from The Ministry of Education, Culture, Sports, Science and Technology (MEXT). We thank Jungeun Kim at SPring-8 for facilities during the synchrotron x-ray diffraction experiment, Kenji Ohoyama and Keiji Nemoto at IMR, Tohoku University, the late Y. Oohara and Toshio Asami at ISSIP, The University of Tokyo for facilities during the neutron-diffraction experiments. We are also grateful to Bassam Hitti, Donald Arseneau, and Syd Kreitzman at TRIUMF, Canada, for their continuing technical support to the μSR experiments. We thank V. Ravi Chandra at National Institute of Science, India, and R. Moessner at Max-Planck-Institut f{\"u}r Physik komplexer Systeme, Germany for discussion. X.G.Z. wrote the manuscript and Mika Tei at University of California, Berkeley did proofreading. Publisher Copyright: {\textcopyright} 2017 American Physical Society.",

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doi = "10.1103/PhysRevB.96.144111",

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T1 - Spin order in the Heisenberg kagome antiferromagnet MgF e3(OH)6 C l2

AU - Fujihala, M.

AU - Zheng, X. G.

AU - Lee, Sanghyun

AU - Kamiyama, T.

AU - Matsuo, Akira

AU - Kindo, Koichi

AU - Kawae, T.

N1 - Funding Information: This work is supported by a Grant-in-Aid for Scientific Research (B) to X.G.Z. (Grants No. 19340100 and No. 26289092) from the Japan Society for the Promotion of Science (JSPS) and a Grant-in-Aid for Scientific Research on Priority Areas to X.G.Z. (Grants No. 20046012 and No. 22014008) from The Ministry of Education, Culture, Sports, Science and Technology (MEXT). We thank Jungeun Kim at SPring-8 for facilities during the synchrotron x-ray diffraction experiment, Kenji Ohoyama and Keiji Nemoto at IMR, Tohoku University, the late Y. Oohara and Toshio Asami at ISSIP, The University of Tokyo for facilities during the neutron-diffraction experiments. We are also grateful to Bassam Hitti, Donald Arseneau, and Syd Kreitzman at TRIUMF, Canada, for their continuing technical support to the μSR experiments. We thank V. Ravi Chandra at National Institute of Science, India, and R. Moessner at Max-Planck-Institut für Physik komplexer Systeme, Germany for discussion. X.G.Z. wrote the manuscript and Mika Tei at University of California, Berkeley did proofreading. Publisher Copyright: © 2017 American Physical Society.

PY - 2017/10/24

Y1 - 2017/10/24

N2 - Spin behaviors on kagome lattices have received increased attention because of their exotic magnetic states. Here, we report magnetic ordering in the S=2 kagome antiferromagnet MgFe3(OH)6Cl2. The compound has been synthesized by selectively replacing the magnetic ions in the triangular planes of its parent compound of deformed pyrochlore Fe2(OH)3Cl with nonmagnetic Mg. Whereas Fe2(OH)3Cl showed antiferromagnetic order below TN=8.5K with persistent spin fluctuations, MgFe3(OH)6Cl2 showed an antiferromagnetic transition at an enhanced TN value of 9.9 K. Susceptibility, high-field magnetization, and neutron-diffraction studies suggest that MgFe3(OH)6Cl2 is a Heisenberg-like spin system with a 120° nearest-neighbor spin structure confined in the kagome plane and spin-vector chirality of q=-1 below TN. Muon spin-rotation/-relaxation studies demonstrate that the persisting spin fluctuations are suppressed relative to Fe2(OH)3Cl. The present paper reports the experimental realization of an S=2 kagome antiferromagnet, highlighting a real system with a quasiclassical Heisenberg spin, which may also be a valuable reference system for quantum Heisenberg kagome antiferromagnets.

AB - Spin behaviors on kagome lattices have received increased attention because of their exotic magnetic states. Here, we report magnetic ordering in the S=2 kagome antiferromagnet MgFe3(OH)6Cl2. The compound has been synthesized by selectively replacing the magnetic ions in the triangular planes of its parent compound of deformed pyrochlore Fe2(OH)3Cl with nonmagnetic Mg. Whereas Fe2(OH)3Cl showed antiferromagnetic order below TN=8.5K with persistent spin fluctuations, MgFe3(OH)6Cl2 showed an antiferromagnetic transition at an enhanced TN value of 9.9 K. Susceptibility, high-field magnetization, and neutron-diffraction studies suggest that MgFe3(OH)6Cl2 is a Heisenberg-like spin system with a 120° nearest-neighbor spin structure confined in the kagome plane and spin-vector chirality of q=-1 below TN. Muon spin-rotation/-relaxation studies demonstrate that the persisting spin fluctuations are suppressed relative to Fe2(OH)3Cl. The present paper reports the experimental realization of an S=2 kagome antiferromagnet, highlighting a real system with a quasiclassical Heisenberg spin, which may also be a valuable reference system for quantum Heisenberg kagome antiferromagnets.

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Spin order in the Heisenberg kagome antiferromagnet MgF e3(OH)6 C l2

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