Edinburgh Research Explorer

Relaxation dynamics in a Fe7 nanomagnet

Research output: Contribution to journalArticle

Related Edinburgh Organisations

Open Access permissions



  • Download as Adobe PDF

    Rights statement: Copyright © 2013 The American Physical Society.This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Physical Society.

    Final published version, 2.16 MB, PDF document

Original languageEnglish
Article number054409
Number of pages7
JournalPhysical Review B: Condensed Matter and Materials Physics
Issue number5
Publication statusPublished - 13 Feb 2013


We investigate the phonon-induced relaxation dynamics in the Fe-7 magnetic molecule, which is made of two Fe3+ triangles bridged together by a central Fe3+ ion. The competition between different antiferromagnetic exchange interactions leads to a low-spin ground state multiplet with a complex pattern of low-lying excited levels. We theoretically investigate the decay of the time correlation function of molecular observables, such as the cluster magnetization, due to the spin-phonon interaction. We find that more than one time contributes to the decay of the molecular magnetization. The relaxation dynamics is probed by measurements of the nuclear spin-lattice relaxation rate 1/T-1. The interpretation of these measurements allows the determination of the magnetoelastic coupling strength and to set the scale factor of the relaxation dynamics time scales. In our theoretical interpretation of 1/T-1 data we also take into account the wipeout effect at low temperatures.

Download statistics

No data available

ID: 6307219