Coexistence of magnetic order and persistent spin dynamics in a quantum kagome antiferromagnet with no intersite mixing [dataset]

Mi, Jin-Xiao (Fujian Provincial Key Laboratory of Advanced Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, Fujian Province, People’s Republic of China); Sun, Wei (Fujian Provincial Key Laboratory of Advanced Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, Fujian Province, People’s Republic of China); Gomilšek, Matjaž (Jožef Stefan Institute, Jamova c. 39, SI-1000 Ljubljana, Slovenia & Durham University, South Rd, Durham DH1 3LE, United Kingdom); Jagličić, Zvonko (Faculty of Civil and Geodetic Engineering, University of Ljubljana, SI-1000 Ljubljana, Slovenia & Institute of Mathematics, Physics and Mechanics, SI-1000 Ljubljana, Slovenia); Lord, James S. (ISIS Pulsed Neutron and Muon Source, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom); Verezhak, Joel A. T. (Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland); Shang, Tian (Laboratory for Multiscale Materials Experiments, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland); Zorko, Andrej (Jožef Stefan Institute, Jamova c. 39, SI-1000 Ljubljana, Slovenia); Klanjšek, Martin (Jožef Stefan Institute, Jamova c. 39, SI-1000 Ljubljana, Slovenia); Pregelj, Matej (Jožef Stefan Institute, Jamova c. 39, SI-1000 Ljubljana, Slovenia)

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Coexistence of magnetic order and persistent spin dynamics in a quantum kagome antiferromagnet with no intersite mixing [dataset] Open Access

One of the key questions concerning frustrated lattices that has lately emerged is the role of disorder in inducing spin-liquid-like properties. In this context, the quantum kagome antiferromagnet YCu3(OH)6Cl3, which has been recently reported as the first geometrically perfect realization of the kagome lattice with negligible magnetic/nonmagnetic intersite mixing and a possible quantum-spin-liquid ground state, is of particular interest. However, contrary to previous conjectures, here we show clear evidence of bulk magnetic ordering in this compound below TN = 15 K by combining bulk magnetization and heat capacity measurements, and local-probe muon spin relaxation measurements. The magnetic ordering in this material is rather unconventional in several respects. First, a crossover regime where the ordered state coexists with the paramagnetic state extends down to TN/3 and, second, the fluctuation crossover is shifted far below TN. Moreover, persistent spin dynamics that is observed at temperatures as low as T/TN = 1/300 could be a sign of emergent excitations of correlated spin loops or, alternatively, a sign of fragmentation of each magnetic moment into an ordered and a fluctuating part.

Descriptions

Resource type: Dataset
Contributors: Creator: Zorko, Andrej ¹
Contact person: Zorko, Andrej ¹
Creator: Pregelj, Matej ¹
Creator: Klanjšek, Martin ¹
Creator: Gomilšek, Matjaž ²
Data curator: Gomilšek, Matjaž ²
Creator: Jagličić, Zvonko ³
Creator: Lord, James S. ⁴
Creator: Verezhak, Joel A. T. ⁵
Creator: Shang, Tian ⁶
Creator: Sun, Wei ⁷
Creator: Mi, Jin-Xiao ⁷

¹ Jožef Stefan Institute, Jamova c. 39, SI-1000 Ljubljana, Slovenia
² Jožef Stefan Institute, Jamova c. 39, SI-1000 Ljubljana, Slovenia & Durham University, South Rd, Durham DH1 3LE, United Kingdom
³ Faculty of Civil and Geodetic Engineering, University of Ljubljana, SI-1000 Ljubljana, Slovenia & Institute of Mathematics, Physics and Mechanics, SI-1000 Ljubljana, Slovenia
⁴ ISIS Pulsed Neutron and Muon Source, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
⁵ Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
⁶ Laboratory for Multiscale Materials Experiments, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
⁷ Fujian Provincial Key Laboratory of Advanced Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, Fujian Province, People’s Republic of China
Funder: Javna Agencija za Raziskovalno Dejavnost RS (Slovenian Research Agency)
Engineering and Physical Sciences Research Council
Research methods
Other description
Keyword: Magnetic order
Spin fragmentation
Geometric frustration
Magnetism
Persistent spin dynamics
Muon-spin relaxation
Magnetization
Heat capacity
Kagome
Subject: Condensed matter
Location
Language: English
Cited in: arxiv:1904.02878
doi:10.1103/PhysRevB.99.214441
Identifier: ark:/32150/r1n296wz14j
doi:10.15128/r1n296wz14j
Rights: Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC)
Publisher: Durham University
Date Created

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User N. Syrotiuk has updated Coexistence of magnetic order and persistent spin dynamics in a quantum kagome antiferromagnet with no intersite mixing [dataset]	almost 6 years ago
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