Dynamics at (&lt;em&gt;T&lt;/em&gt;→0) in half-integer isotropic high-spin molecules

Salman, Zaher; Keren, Amit; Mendels, Philippe; Marvaud, Valerie; Scuiller, Ariane; Verdaguer, Michel; Lord, James S.; Baines, Chris

doi:10.1103/PhysRevB.65.132403

Dynamics at (T→0) in half-integer isotropic high-spin molecules

Salman Z, Keren A, Mendels P, Marvaud V, Scuiller A, Verdaguer M, Lord JS & Baines C

Citation

Salman, Z., Keren, A., Mendels, P., Marvaud, V., Scuiller, A., Verdaguer, M., … Baines, C. (2002). Dynamics at (T→0) in half-integer isotropic high-spin molecules. Physical Review B, 65(13), 132403 (4 pp.). https://doi.org/10.1103/PhysRevB.65.132403

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:11640

We investigate the dynamical spin-spin autocorrelation function of the isotropic high-spin molecules CrCu₆ (S=9/2), CrNi₆ (S=15/2), and CrMn₆ (S=27/2), using magnetization, spin-lattice relaxation of muon spin (μSR), and NMR measurements. We find that the field autocorrelation time τ of the molecule’s spin at zero and low fields is nearly temperature independent as T→50mK. The high temperature τ is very different between the three molecules. Surprisingly, it is identical (∼10 ns) at low temperature. This suggests that τ is governed by hyperfine interactions.