Characterization of the Spin-Frustration in Doubly Ordered Perovskite NaYbZnWO6 Obtained by High-Pressure Synthesis
Characterization of the Spin-Frustration in Doubly Ordered Perovskite NaYbZnWO6 Obtained by High-Pressure Synthesis
We present the high-pressure synthesis of a novel doubly ordered perovskite NaYbZnWO6 composed of the rare earth magnetic Yb3+ ions and its comprehensive magnetic characterization. The structure consists of alternating layers of Yb3+ and Na+ ions along the c-axis, with Yb3+ ions forming slightly distorted two-dimensional (2D) square lattices of kite-shape (Yb3+)4 units. Low-temperature magnetic susceptibility measurements indicate that the ground state of Yb3+ can be described by an effective Jeff = 1/2 Kramers doublet. Further, specific heat analysis reveals an internal magnetic field of the order of 1.48 K; however, magnetization data do not exhibit magnetic ordering down to 0.4 K. The spin exchanges of NaYbZnWO6 evaluated by density functional theory (DFT) calculations unveil spin frustration in the compound. These findings suggest that NaYbZnWO6 is a promising candidate for realizing a magnetically disordered quantum state.
Crystal structure of NaYbZnWO6 viewed along b-direction. The distorted square lattice of Yb3+ cations. Temperature dependence of specific heat data measured under different magnetic fields. The inset shows the variation in low-temperature regions.
