2013/04/09 by J. Schnack, Jürgen Schnack, A. M. Todea +18
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetism in coordination complexes #Nanocluster Synthesis and Applications #Polyoxometalates: Synthesis and Applications #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.1304.2603
7 pages, 7 figures, submitted to Phys. Rev. B
arxiv created 2013/04/09 · openalex publication_date 2013/04/09 · arxiv updated 2013/04/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The magnetic properties and spin dynamics of the spin frustrated polyoxometalate W72V30, where 30 V4+ ions (s = 1/2) occupy the sites of an icosidodecahedron, have been investigated by low temperature magnetization, magnetic susceptibility, proton and vanadium nuclear magnetic resonance, and theoretical studies. The field-dependent magnetization at 0.5 K increases monotonically up to 50 T without any sign of staircase behavior. This low-temperature behavior cannot be explained by a Heisenberg model based on a single value of the nearest-neighbor exchange coupling. We analyze this behavior upon assuming a rather broad distribution of nearest-neighbor exchange interactions. Slow spin dynamics of W72V30 at low temperatures is observed from the magnetic field and temperature dependence of nuclear spin-lattice relaxation rate 1/T1 measurements.