150 citations · 492 across the 21 of their papers we have counts for
24 papers · 1 filter
Are superparamagnetic spins classical?
D. A. Garanin
Effective giant spins of magnetic nanoparticles are considered classically in the conventional theory of superparamagnetism based on the Landau-Lifshitz-Langevin equation. However,…
Effect of environmental spins on Landau-Zener transitions
D. A. Garanin, R. Neb, R. Schilling
Landau-Zener (LZ) transitions of a two-level system (e. g., electronic spin in molecular magnets) coupled to one or many environmental spins (e. g., nuclear spins) are studied. For…
Dipolar Ordering and Quantum Dynamics of Domain Walls in Mn-12 Acetate
D. A. Garanin, E. M. Chudnovsky
We find that dipolar interactions favor ferromagnetic ordering of elongated crystals of Mn12 Acetate below 0.8 K. Ordered crystals must possess domain walls. Motion of the wall cor…
Extended Debye Model for Molecular Magnets
D. A. Garanin
Heat capacity data on Mn12 are fitted within the extended Debye model that takes into account a continuum of optical modes as well as three different speeds of sound.
Phonon bottleneck in the low-excitation limit
D. A. Garanin
The phonon-bottleneck problem in the relaxation of two-level systems (spins) via direct phonon processes is considered numerically in the weak-excitation limit where the Schroeding…
Effective anisotropies and energy barriers of magnetic nanoparticles with Neel surface anisotropy
R. Yanes, O. Chubykalo-Fesenko, H. Kachkachi +3
Magnetic nanoparticles with Neel surface anisotropy, different internal structures, surface arrangements and elongation are modelled as many-spin systems. The results suggest that…