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Open Access Nano Express

Spin dynamics of an ultra-small nanoscale molecular magnet

Orion Ciftja

Author Affiliations

Department of Physics, Prairie View A&M University, Prairie View, TX, 77446, USA

Nanoscale Research Letters 2007, 2:168-174  doi:10.1007/s11671-007-9049-5

Published: 6 March 2007

Abstract

We present mathematical transformations which allow us to calculate the spin dynamics of an ultra-small nanoscale molecular magnet consisting of a dimer system of classical (high) Heisenberg spins. We derive exact analytic expressions (in integral form) for the time-dependent spin autocorrelation function and several other quantities. The properties of the time-dependent spin autocorrelation function in terms of various coupling parameters and temperature are discussed in detail.

Keywords:
Spin dynamics; Nanoscale molecular magnetism; Time-dependent spin autocorrelation function; Exchange interaction; Biquadratic exchange interaction; 75.10.Hk; 75.50.Xx