Structure transition and zigzag magnetic order in Ir/Rh-substituted honeycomb lattice α-RuCl3

Zachary Morgan; Iris Ye; Colin L. Sarkis; Xiaoping Wang; Stephen Nagler; Jiaqiang Yan

doi:10.1103/PhysRevMaterials.8.016201

Structure transition and zigzag magnetic order in Ir/Rh-substituted honeycomb lattice α-RuCl3

Zachary Morgan, Iris Ye, Colin L. Sarkis, Xiaoping Wang, Stephen Nagler, Jiaqiang Yan

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

Abstract

We report magnetization and neutron diffraction studies on crystal and magnetic structures of Ir- and Rh-substituted honeycomb lattice α-RuCl3. The iridium or rhodium atoms are distributed at the Ru site with little structural modification. Both systems undergo a room-temperature monoclinic C2/m to low-temperature trigonal R3¯ phase transformation with a large recoverable hysteresis. At low temperature, a zigzag spin order is observed with the same characteristic wave vector (0,0.5,1) as in the parent α-RuCl3. Detailed magnetic structure refinement reveals an ordered moment of 0.32(5)μB/Ru and an upper boundary of canting angle of 15(4)° away from the basal plane at 5 K for the 10% Ir-substituted α-RuCl3, which is different from the 0.45-0.73 μB/Ru and 32°-48° canting angle reported in the parent compound α-RuCl3. The observation of unchanged RuCl6 local octahedral environment, reduced ordered magnetic moment size and canting angle compared to previously reported highlights the potential to study quantum spin-liquid behavior through nonmagnetic ion doping.

Original language	English
Article number	016201
Journal	Physical Review Materials
Volume	8
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevMaterials.8.016201
State	Published - Jan 2024

Funding

I.Y. was supported by the Oak Ridge National Laboratory (ORNL) Next Generation STEM Internship Program (NGSI) Program, sponsored by the U.S. Department of Energy and administered by the Oak Ridge Institute for Science and Education. This research was supported by the U.S. Department of Energy (DOE), Office of Science, National Quantum Information Science Research Centers, Quantum Science Center and used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by ORNL. All drawings of crystal and magnetic structures were obtained using vesta software . This paper has been authored by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy.

Funders	Funder number
U.S. Department of Energy
Office of Science	DE-AC05-00OR22725
Oak Ridge National Laboratory
Oak Ridge Institute for Science and Education

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title = "Structure transition and zigzag magnetic order in Ir/Rh-substituted honeycomb lattice α-RuCl3",

abstract = "We report magnetization and neutron diffraction studies on crystal and magnetic structures of Ir- and Rh-substituted honeycomb lattice α-RuCl3. The iridium or rhodium atoms are distributed at the Ru site with little structural modification. Both systems undergo a room-temperature monoclinic C2/m to low-temperature trigonal R3¯ phase transformation with a large recoverable hysteresis. At low temperature, a zigzag spin order is observed with the same characteristic wave vector (0,0.5,1) as in the parent α-RuCl3. Detailed magnetic structure refinement reveals an ordered moment of 0.32(5)μB/Ru and an upper boundary of canting angle of 15(4)° away from the basal plane at 5 K for the 10% Ir-substituted α-RuCl3, which is different from the 0.45-0.73 μB/Ru and 32°-48° canting angle reported in the parent compound α-RuCl3. The observation of unchanged RuCl6 local octahedral environment, reduced ordered magnetic moment size and canting angle compared to previously reported highlights the potential to study quantum spin-liquid behavior through nonmagnetic ion doping.",

author = "Zachary Morgan and Iris Ye and Sarkis, {Colin L.} and Xiaoping Wang and Stephen Nagler and Jiaqiang Yan",

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doi = "10.1103/PhysRevMaterials.8.016201",

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AU - Morgan, Zachary

AU - Ye, Iris

AU - Sarkis, Colin L.

AU - Wang, Xiaoping

AU - Nagler, Stephen

AU - Yan, Jiaqiang

PY - 2024/1

Y1 - 2024/1

N2 - We report magnetization and neutron diffraction studies on crystal and magnetic structures of Ir- and Rh-substituted honeycomb lattice α-RuCl3. The iridium or rhodium atoms are distributed at the Ru site with little structural modification. Both systems undergo a room-temperature monoclinic C2/m to low-temperature trigonal R3¯ phase transformation with a large recoverable hysteresis. At low temperature, a zigzag spin order is observed with the same characteristic wave vector (0,0.5,1) as in the parent α-RuCl3. Detailed magnetic structure refinement reveals an ordered moment of 0.32(5)μB/Ru and an upper boundary of canting angle of 15(4)° away from the basal plane at 5 K for the 10% Ir-substituted α-RuCl3, which is different from the 0.45-0.73 μB/Ru and 32°-48° canting angle reported in the parent compound α-RuCl3. The observation of unchanged RuCl6 local octahedral environment, reduced ordered magnetic moment size and canting angle compared to previously reported highlights the potential to study quantum spin-liquid behavior through nonmagnetic ion doping.

AB - We report magnetization and neutron diffraction studies on crystal and magnetic structures of Ir- and Rh-substituted honeycomb lattice α-RuCl3. The iridium or rhodium atoms are distributed at the Ru site with little structural modification. Both systems undergo a room-temperature monoclinic C2/m to low-temperature trigonal R3¯ phase transformation with a large recoverable hysteresis. At low temperature, a zigzag spin order is observed with the same characteristic wave vector (0,0.5,1) as in the parent α-RuCl3. Detailed magnetic structure refinement reveals an ordered moment of 0.32(5)μB/Ru and an upper boundary of canting angle of 15(4)° away from the basal plane at 5 K for the 10% Ir-substituted α-RuCl3, which is different from the 0.45-0.73 μB/Ru and 32°-48° canting angle reported in the parent compound α-RuCl3. The observation of unchanged RuCl6 local octahedral environment, reduced ordered magnetic moment size and canting angle compared to previously reported highlights the potential to study quantum spin-liquid behavior through nonmagnetic ion doping.

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Structure transition and zigzag magnetic order in Ir/Rh-substituted honeycomb lattice α-RuCl3

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