Field-induced magnetic order in DyTa${}_7$O${}_{19}$ with two-dimensional pseudospin-$\frac{1}{2}$ triangular lattice

Abstract

The magnetic ground state of geometrically frustrated antiferromagnet attracts great research interests due to the possibility to realize novel quantum magnetic state such as a quantum spin liquid. Here we present a comprehensive magnetic characterization of DyTa${}_7$O${}_{19}$ with ideal two-dimensional triangular lattice. DyTa${}_7$O${}_{19}$ exhibits $c$-axis single-ion magnetic anisotropy. Although long-range magnetic order is not observed down to 100 mK under zero field, by applying a small magnetic field ($\sim$0.1 T), a magnetically ordered state with net magnetization of $M_s$/3 below $T_m$=0.14 K is identified ($M_s$ denotes the saturated magnetization). We argue that this state is an up-up-down magnetic structure phase driven by the dipole-dipole interactions between Ising-like spins of Dy${}^{3+}$ in a two-dimensional triangular lattice, since its ordering temperature and temperature-field phase diagram can be well explained by the theoretical calculations based on dipolar interactions. DyTa${}_7$O${}_{19}$ could be viewed as a rare material platform that realizing pure Ising-like dipolar interaction in a geometrically frustrated lattice.

9 pages, 5 figures

References in corpus (12)

• Dirac Strings and Magnetic Monopoles in Spin Ice Dy2Ti2O7
• Unusual ordered phases of highly frustrated magnets: a review
• Giant Magnetocaloric Effect in Spin Supersolid Candidate Na${}_2$BaCo(PO${}_4$)${}_2$
• Giant Skyrmions Stabilized by Dipole-Dipole Interactions in Thin Ferromagnetic Films
• Frustrated magnet for adiabatic demagnetization cooling to milli-Kelvin temperatures
• Quantum spin liquid in the Ising triangular-lattice antiferromagnet neodymium heptatantalate
• Adiabatic demagnetization cooling well below the magnetic ordering temperature in the triangular antiferromagnet KBaGd(BO3)2
• DyOCl: a rare-earth based two-dimensional van der Waals material with strong magnetic anisotropy
• Spectral evidence for Dirac spinons in a kagome lattice antiferromagnet
• Phase Diagram of Triangular Lattice Quantum Ising Model under External Field
• Quasi One-Dimensional Ising-like Antiferromagnetism in the Rare-earth Perovskite Oxide TbScO${}_3$
• Structural and magnetic characterization of CeTa${}_7$O${}_{19}$ and YbTa${}_7$O${}_{19}$ with two-dimensional pseudospin-1/2 triangular lattice