Room temperature anisotropy in linear chain of magnetic clusters

Finite magnetic clusters and molecular magnets are among important class of systems that are being explored for next generation quantum technology. One of the major obstacles in realizing magnetic molecule-based quantum devices such as magnetic memory device and qubits for quantum information processing, is that their magnetic properties can be stabilized only at very low temperatures. In attempt to enhance anisotropy barrier we have considered a linear chain of Co₅ clusters with each cluster sandwiched between two benzene rings. Using first-principles density functional theory we have investigated the anisotropic properties of linear chains with various lengths. Our calculations show that with a modest length of only 6 nm, the anisotropy approaches room temperature. We also have studied the stability of the magnetic properties of the chain when brought in contact with surfaces. In this talk we will present the details of our findings.