Observation of a level crossing in a molecular nanomagnet using implanted muons.
J Phys Condens Matter
; 23(24): 242201, 2011 Jun 22.
Article
em En
| MEDLINE
| ID: mdl-21628784
ABSTRACT
We have observed an electronic energy level crossing in a molecular nanomagnet (MNM) using muon spin relaxation. This effect, not observed previously despite several muon studies of MNM systems, provides further evidence that the spin relaxation of the implanted muon is sensitive to the dynamics of the electronic spin. Our measurements on a broken ring MNM [H(2)N(t)Bu(is)Pr][Cr(8)CdF(9)(O(2)CC(CH(3))(3))(18)], which contains eight Cr ions, show clear evidence for the S = 0 --> S = 1 transition that takes place at B(c) = 2.3 T. The crossing is observed as a resonance-like dip in the average positron asymmetry and also in the muon spin relaxation rate, which shows a sharp increase in magnitude at the transition and a peak centred within the S = 1 regime.
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1
Base de dados:
MEDLINE
Assunto principal:
Nanotecnologia
/
Magnetismo
/
Mésons
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Modelos Químicos
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article