Relaxation of muon spins in molecular nanomagnets

Research output: Contribution to journalArticle

  • External authors:
  • T. Lancaster
  • S. J. Blundell
  • F. L. Pratt
  • I. Franke
  • A. J. Steele
  • P. J. Baker
  • Z. Salman
  • C. Baines
  • I. Watanabe
  • S. Carretta
  • G. A. Timco

Abstract

We address the cause of the unusual muon spin-relaxation (μ+ SR) results on molecular nanomagnets (MNMs). Through measurements on protonated and deuterated samples of the MNMs Cr7 Mn (S=1) and Cr8 (S=0), we show that the muon spin for S≠0 MNMs is relaxed via dynamic fluctuations of the electronic spins. A freezing out of dynamic processes occurs on cooling and at low temperatures the muon spins are relaxed by the electronic spins which themselves are dephased by incoherent nuclear-field fluctuations. We observe a transition to a state of static magnetic order of the MNM electronic spins in Cr7Mn below 2 K. © 2010 The American Physical Society.

Bibliographical metadata

Original languageEnglish
Article number140409
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume81
Issue number14
DOIs
Publication statusPublished - 28 Apr 2010