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Alignment Of Magnetic Anisotropy Axes In Crystals Of Mn12 Acetate And Mn12-tBuAc Molecular Nanomagnets: Angle-Dependent Ac Susceptibility Study
Chemistry Faculty Publications
  • E Burzurí
  • Ch Carbonera
  • F Luis
  • D Ruiz-Molina
  • Christos Lampropoulos, University of North Florida
  • G Christou
Document Type
Article
Publication Date
1-1-2009
Disciplines
Abstract

We report the results of angular-dependent ac susceptibility experiments performed on two derivatives of Mn12 single-molecular magnets: the well-known Mn12 acetate, which contains disordered acetic acid molecules in interstitial sites of the crystal structure and Mn12-tBuAc, for which solvent molecules are very well ordered in the structure. Our results show (a) that the angular variation is very similar in the two compounds investigated and compatible with a maximum misalignment of the anisotropy axes of less than 3° and (b) that the tunneling rate is faster for the better ordered Mn12-tBuAc compound. These experiments question interstitial disorder as the dominant origin of the thermally activated tunneling phenomenon.

Comments

Originally published in Physical Review B, 80, 224428, 2009

http://dx.doi.org/10.1103/PhysRevB.80.224428

Citation Information
E Burzurí, Ch Carbonera, F Luis, D Ruiz-Molina, et al.. "Alignment Of Magnetic Anisotropy Axes In Crystals Of Mn12 Acetate And Mn12-tBuAc Molecular Nanomagnets: Angle-Dependent Ac Susceptibility Study" (2009)
Available at: http://works.bepress.com/christos_lampropoulos/4/