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Magnetic properties of Langmuir-Blodgett films: A theoretical study. 1. Photoswitching of the magnetic properties of Langmuir films

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons48889

Tyutyulkov,  N.
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons48459

Müllen,  Klaus
MPI for Polymer Research, Max Planck Society;

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Zitation

Tyutyulkov, N., Staykov, A., Müllen, K., & Dietz, F. (2002). Magnetic properties of Langmuir-Blodgett films: A theoretical study. 1. Photoswitching of the magnetic properties of Langmuir films. Langmuir, 18(25), 10030-10034.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-6471-A
Zusammenfassung
The change of intermolecular spin exchange interaction within a half-filled band of two-dimensional Langmuir films formed by photoresponsive radicals has been investigated theoretically. The photoswitching of magnetic properties arises as a result of a reversible photochemical reaction within the building units of the Langmuir films. These units consist of a photochromic moiety connected with a polymethine radical. The various contributions to the Heisenberg effective exchange integral, the direct (Coulomb), kinetic, and indirect spin exchange, have been calculated using the band theory of organic open-shell pi- electron systems.