Characterization of the Spin-Frustration in Doubly Ordered Perovskite NaYbZnWO Obtained by High-Pressure Synthesis.

We present the high-pressure synthesis of a novel doubly ordered perovskite NaYbZnWO composed of the rare earth magnetic Yb ions and its comprehensive magnetic characterization. The structure consists of alternating layers of Yb and Na ions along the -axis, with Yb ions forming slightly distorted two-dimensional (2D) square lattices of kite-shape (Yb) units. Low-temperature magnetic susceptibility measurements indicate that the ground state of Yb can be described by an effective = 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 NaYbZnWO evaluated by density functional theory (DFT) calculations unveil spin frustration in the compound. These findings suggest that NaYbZnWO is a promising candidate for realizing a magnetically disordered quantum state.