TY - JOUR
T1 - Spin order in the classical spin kagome antiferromagnet M gx M n4-x(OH)6Cl2
AU - Rahman Bhuiyan, Md Mahbubur
AU - Zheng, Xu Guang
AU - Hagihala, Masato
AU - Torii, Shuki
AU - Kamiyama, Takashi
AU - Kawae, Tatsuya
N1 - Funding Information:
This research is supported by the Grant-in-Aid for Scientific Research (A) (Grant No. 19H00835) from the Japan Society for the Promotion of Science (JSPS). We acknowledge the financial support of Bangabandhu Science and Technology Fellowship Trust, Ministry of Science and Technology, Government of the People's Republic of Bangladesh to one of the authors as a scholarship to carry out their doctoral study in Saga University, Japan. The neutron diffraction experiment at the Materials and Life Science Experimental Facility of the J-PARC was performed under a user program (Proposal No. 2018A0102). T. Yuasa participated in the neutron diffraction experiment.
Publisher Copyright:
© 2020 American Physical Society.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/4/1
Y1 - 2020/4/1
N2 - Geometrically frustrated kagome-lattice antiferromagnets have received much attention because of their exotic magnetic behaviors. Here we report the synthesis, structure, and magnetism of an S=5/2 quasiclassical new spin kagome compound. Polycrystalline compounds of MgxMn4-x(OH)6Cl2, with a nominal ideal chemical formula of MgMn3(OH)6Cl2, have been successfully synthesized by selectively substituting the triangular-lattice-plane Mn2+ with nonmagnetic Mg2+. The compounds studied crystallize in rhombohedral structure in space group R-3m, in a similar crystal structure to the much-researched quantum spin liquid candidates herbertsmithite ZnCu3(OH)6Cl2 and tondiite MgCu3(OH)6Cl2. Antiferromagnetic transition below TN∼8K and a 120° nearest-neighbor spin ordering confined in the kagome plane with positive spin chirality have been revealed by magnetic susceptibility measurements and neutron diffraction experiment. The obtained value of critical exponent β=0.35 agrees with a three-dimensional Heisenberg spin model. The present work suggests the intrinsic nature of long-range order in classical Heisenberg kagome aniferromagnet and provides a classical reference system to quantum kagome antiferromagnets.
AB - Geometrically frustrated kagome-lattice antiferromagnets have received much attention because of their exotic magnetic behaviors. Here we report the synthesis, structure, and magnetism of an S=5/2 quasiclassical new spin kagome compound. Polycrystalline compounds of MgxMn4-x(OH)6Cl2, with a nominal ideal chemical formula of MgMn3(OH)6Cl2, have been successfully synthesized by selectively substituting the triangular-lattice-plane Mn2+ with nonmagnetic Mg2+. The compounds studied crystallize in rhombohedral structure in space group R-3m, in a similar crystal structure to the much-researched quantum spin liquid candidates herbertsmithite ZnCu3(OH)6Cl2 and tondiite MgCu3(OH)6Cl2. Antiferromagnetic transition below TN∼8K and a 120° nearest-neighbor spin ordering confined in the kagome plane with positive spin chirality have been revealed by magnetic susceptibility measurements and neutron diffraction experiment. The obtained value of critical exponent β=0.35 agrees with a three-dimensional Heisenberg spin model. The present work suggests the intrinsic nature of long-range order in classical Heisenberg kagome aniferromagnet and provides a classical reference system to quantum kagome antiferromagnets.
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U2 - 10.1103/PhysRevB.101.134424
DO - 10.1103/PhysRevB.101.134424
M3 - Article
AN - SCOPUS:85084926762
SN - 2469-9950
VL - 101
JO - Physical Review B
JF - Physical Review B
IS - 13
M1 - 134424
ER -