Striped Magnetic Ground State of the Kagome Lattice in Fe4Si2Sn7O16

Abstract

We have experimentally identified a new magnetic ground state for the kagome lattice, in the perfectly hexagonal Fe2+ (3d6, S = 2) compound Fe4Si2Sn7O16. Representational symmetry analysis of neutron diffraction data shows that below T_N = 3.5 K, the spins on 2/3 of the magnetic ions order into canted antiferromagnetic chains, separated by the remaining 1/3 which are geometrically frustrated and show no long-range order down to at least T = 0.1 K. Moessbauer spectroscopy confirms that there is no static order on the latter 1/3 of the magnetic ions - i.e., they are in a liquid-like rather than a frozen state - down to at least 1.65 K. A heavily Mn-doped sample Fe1.45Mn2.55Si2Sn7O16 has the same magnetic structure. Although the propagation vector q = (0, 1/2 , 1/2 ) breaks hexagonal symmetry, we see no evidence for magnetostriction in the form of a lattice distortion within the resolution of our data. We discuss the relationship to partially frustrated magnetic order on the pyrochlore lattice of Gd2Ti2O7, and to theoretical models that predict symmetry breaking ground states for perfect kagome lattices.

arXiv comment5 pages, 5 figures

References in corpus (10)

• Ground State of the Kagome Lattice Heisenberg Antiferromagnet
• Order in the Heisenberg Pyrochlore: The Magnetic Structure of Gd2Ti2O7
• Paramagnetism in the kagome compounds (Zn,Mg,Cd)Cu${}_3$(OH)${}_6$Cl${}_2$
• Magnetic density of states at low energy in geometrically frustrated systems
• Symmetry Reduction in the Quantum Kagome Antiferromagnet Herbertsmithite
• Striped spin liquid crystal ground state instability of kagome antiferromagnets
• Emergent quasi-one-dimensionality in a kagomé magnet: A simple route to complexity
• Domain Wall Spin Dynamics in Kagome Antiferromagnets
• Magnetic properties of a family of quinternary oxalates
• Nature of Partial Magnetic Order in the Frustrated Antiferromagnet Gd2Ti2O7

Cited by in corpus (6)

• Vesignieite: a $S=\frac{1}{2}$ kagome antiferromagnet with dominant third-neighbor exchange
• Noncoplanar multi-k states in frustrated spinel and kagome magnets
• Magnetic inhomogeneity in the copper pseudochalcogenide CuNCN
• Partial magnetic order in kagome spin ice
• Continuous transformation between ferro and antiferro circular structures in $J_1-J_2-J_3$ frustrated Heisenberg model
• Orbital altermagnetism on the kagome lattice and possible application to $A$V${}_3$Sb${}_5$