Effects of frustration in Cr8Fe molecular magnet Karlo Penc

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Seminários de Física da Matéria Condensada
Centro de Física da Universidade do Minho
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Quarta-Feira, 25 de Novembro às 11h00.
sala 1305 CP1
Effects of frustration in
Cr8Fe molecular magnet
Karlo Penc
Research Institute for Solid State Physics and Optics
Hungarian Academy of Sciences - Hungary
Resumo: Cr8Fe is a molecular magnet of antiferromagnetically coupled spins in a
ring geometry. We model the molecule using a Heisenberg model with nearest
neighbor interactions only. The odd number of spins leads to frustration and, as a
consequence, to a surprisingly rich phase diagram in magnetic field. Apart from
trivial phases, we found a plateau and a two-fold degenerate chiral phase.
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