Spin dynamics of an ultra-small nanoscale molecular magnet

Nanoscale Research Letters20072:168

DOI: 10.1007/s11671-007-9049-5

Received: 19 December 2006

Accepted: 13 February 2007

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

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Authors’ Affiliations

(1)
Department of Physics, Prairie View A&M University

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Copyright

© to the authors 2007