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Origin of the fast magnetization tunneling in the single-molecule magnet [Ni(hmp)(t-BuEtOH)Cl]4.
- Source :
-
Journal of Applied Physics . 5/15/2005, Vol. 97 Issue 10, p10M501-1-10M501-3. 3p. 2 Graphs. - Publication Year :
- 2005
-
Abstract
- We present high-frequency angle-dependent EPR data for crystals of [NixZn1-x(hmp)(t-BuEtOH)Cl]4 (x=1 and 0.02). The x=1 complex behaves as a single-molecule magnet at low temperatures, displaying hysteresis and exceptionally fast magnetization tunneling. We show that this behavior is related to a fourth-order transverse crystal-field interaction, which produces a significant tunnel splitting (∼10 MHz) of the ground state of this S=4 system. The magnitude of the fourth-order anisotropy, and the dominant axial term (D), can be related to the single-ion interactions (Di and Ei) at the individual NiII sites, as determined for the x=0.02 crystals. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 97
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 100455425
- Full Text :
- https://doi.org/10.1063/1.1845871