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Molecular magnets are systems where a permanent magnetization and magnetic hysteresis can be achieved (although usually at extremely low temperatures) not through a three-dimensional magnetic ordering, but as a purely one- molecule phenomenon.

The requisites for such a system are:

a high spin ground state
a high zero-field-splitting (due to high magnetic anisotropy)

The combination of these properties can lead to an energy barrier , so that, at low temperatures, the system can be trapped in one of the high-spin energy wells.

Molecular magnets exhibit an increasing product ( magnetic susceptibility times temperature) with decreasing temperature, and can be characterized by a shift both in position and intensity of the a.c. magnetic susceptibility.

The first molecular magnet was a dodecanuclear manganese complex, which is held together by oxo- bridges and acetate anions.

Molecular magnets are interesting both from a purely theoretical point of view, for their quantum behavior, and from a practical point of view, as candidates for quantum computing qubitA qubit is not to be confused with a cubit, which is an ancient measure of length. A qubit ( quantum + bit; pronounced /kyoobit/ [1 ) is a unit of quantum information. That information is described by state in a 2-level quantum mechanical system, whose tws.

ElectromagnetismElectromagnetism is the physics of the electromagnetic field: a field, encompassing all of space, composed of the electric field and the magnetic field. The electric field is produced by stationary electric charges, and gives rise to the electric force, t

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Topics: Molecular Magnet, Molecular Biology, Molecular Orbital...

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