In Article I, we showed that the freeon-exchange theory of magnetic coupling is a viable alternative to the widely used spin-exchange theory. In Article II, we are concerned with the symmetric-bridge, molecular magnet, AXB, where A and B are magnetic atoms and X is the bridge. The symmetric-bridge m
The freeon theory of molecular magnets. III. The linear polyene model
β Scribed by F. A. Matsen
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 171 KB
- Volume
- 72
- Category
- Article
- ISSN
- 0020-7608
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β¦ Synopsis
We applied freeon dynamics to the computation of the magnetic coupling constant of the linear polyene model of the AXA molecular magnet. Our spectrum is the superposition of the freeon exchange and the linearized HuckelαHubbard spectra. The computed magnetic coupling constant goes from FM to AFM coupling as a linear function of the ratio of the hopping integral to the zero-order ferromagnetic coupling constant.
π SIMILAR VOLUMES
The freeon theory of magnetism is a viable alternative to the well-known Heisenberg theory. In particular, the freeon-exchange theory provides a deeper insight into the nature of the magnetic interaction than does the spin-exchange theory. In addition, it avoids the superfluous M quantum number in z
Quantum chemical ab initio calculations have been performed for the magnetic exchange coupling in three linear oxo-bridged heterobinuclear transition-metal Ε½ . Ε½ . complexes of the form L M III -O-M III L with M , M s Ti, V, Cr. In order to 5 1 2 5 1 2 simplify the calculations, the terminal ligands
We have already proposed a convenient method to estimate the magnitude of the Peierls Ε½ . instability in finite one-and two-dimensional 1D and 2D polyenes from the viewpoint w Ε½ .x of orbital symmetry J. Chem. Phys., 103, 9726 1995 . This treatment is applied to a model system for charge-transfer co