Alignment Of Magnetic Anisotropy Axes In Crystals Of Mn12 Acetate And Mn12-tBuAc Molecular Nanomagnets: Angle-Dependent Ac Susceptibility Study

Authors

E Burzurí
Ch Carbonera
F Luis
D Ruiz-Molina
Christos Lampropoulos, University of North FloridaFollow
G Christou

Document Type

Article

Publication Date

2009

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

Recommended Citation

Burzurí, E; Carbonera, Ch; Luis, F; Ruiz-Molina, D; Lampropoulos, Christos; and Christou, G, "Alignment Of Magnetic Anisotropy Axes In Crystals Of Mn12 Acetate And Mn12-tBuAc Molecular Nanomagnets: Angle-Dependent Ac Susceptibility Study" (2009). Chemistry Faculty Research and Scholarship. 13.
https://digitalcommons.unf.edu/achm_facpub/13