This review is intended as an introduction to mesomagnetism, with an emphasis on what the
defining length scales and their origins are. It includes a brief introduction to the …

Nanometer-sized magnetic particles have generated continuous interest since the late
1940s because the study of their properties has proved to be scientifically and …

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We present a theory of resonant quantum tunneling of large spins through thermally
activated states. It gives numerical results that are in good agreement with data from recent …

The escape rate Γ of the large-spin model described by the Hamiltonian H=− DS z 2− H z S
z− H x S x is investigated with the help of the mapping onto a particle moving in a double …

The quantum-classical correspondence between local minima on the classical energy
landscape and excited eigenstates in the energy spectrum is studied within the context of …

The system of two coupled Bose-Einstein condensates is mapped onto a uniaxial spin with
an applied magnetic field. The mean-field interaction, the coupling, and the asymmetry or …

Macroscopic quantum tunneling imposes an upper limit on the areal density of magnetic
disk drives. We derive a general expression for this limit, and apply it to Co-alloy-based …

We calculate the quantum tunneling rate of a ferromagnetic particle of∼ 100 Å diameter in
a magnetic field of arbitrary angle. We consider the magnetocrystalline anisotropy with the …

The time evolution of a model quantal magnetic moment proportional to an angular
momentum, S, is studied and compared to that of a classical magnetic moment. The …