The 55 Mn NMR in oriented powder crystal of Mn12Ac has been investigated at 1.4−2.0 K in zero field and with external fields along the c-axis. Three kinds of 55 Mn NMR, with central frequencies at 230.2±0.1, 279.4±0.1 and 364.±0.1 MHz, composed of five-fold quadrupole-split lines for I=5/2 nuclei have been interpreted to arise from Mn 4+ ion, and two crystallographically-inequivalent Mn 3+ ions...

The dynamic scaling functions for ferromagnets above and below the critical temperature are determined using mode coupling theory. Below the critical temperature we study isotropic ferromagnets taking into account the exchange interaction only and give the first numerical solution of the resulting mode coupling equations. In the paramagnetic phase we examine how the critical dynamics is modifie...

The fully relativistic theory of the g factor of Li-like ions with nonzero nuclear spin is considered for the (1s)22s state. The magnetic-dipole hyperfine-interaction correction to the atomic g factor is calculated including the one-electron contributions as well as the interelectronic-interaction effects of order 1/Z. This correction is combined with the interelectronic-interaction, QED, nucle...

Hole spins in semiconductors are a potential qubit alternative to electron spins. In nuclear-spin-rich host crystals like GaAs, the hyperfine interaction of hole with nuclei is considerably weaker than that for electrons, leading potentially longer coherence times. Here we demonstrate optical pumping and coherent population trapping acceptor-bound holes strained GaAs epitaxial layer. We find $\...