Spin superradiance by magnetic nanomolecules and nanoclusters

TL;DR

This paper explores how magnetic nanomolecules and nanoclusters can exhibit superradiance through coherent spin dynamics induced by a resonant circuit, highlighting the effects of magnetic anisotropy and geometry.

Contribution

It demonstrates the feasibility of inducing superradiance in magnetic nanomaterials using resonant circuits and analyzes the influence of anisotropy and orientation on coherence.

Findings

Coherent spin radiation can be achieved in magnetic nanomaterials.

Magnetic anisotropy significantly affects superradiance.

Geometric orientation influences the coherence process.

Abstract

Spin dynamics of assemblies of magnetic nanomolecules and nanoclusters can be made coherent by inserting the sample into a coil of a resonant electric circuit. Coherence is organized through the arising feedback magnetic field of the coil. The coupling of a magnetic sample with a resonant circuit induces fast spin relaxation and coherent spin radiation, that is, superradiance. We consider spin dynamics described by a realistic Hamiltonian, typical of magnetic nanomolecules and nanoclusters. The role of magnetic anisotropy is studied. A special attention is paid to geometric effects related to the mutual orientation of the magnetic sample and resonator coil.