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Efeitos de frustração geométrica em antiferromagnetos desordenados com clusters
(Universidade Federal de Santa Maria, 2019-01-11)
In magnetic systems, frustration - which refers to the inhability to satisfy all the interactios
simultaneously - has ravealed a rich phenomenology. In particular, disorder and geometrical
features are possible sources ...
Efeitos de campos magnéticos aleatórios em sistemas de vidro de spin com clusters
(Universidade Federal de Santa Maria, 2019-03-08)
This work investigates the effects of the presence of random magnetic fields (RFs) in
thermodynamic quantities that characterize the spin glass state (VS). We adopt a cluster
spin model that considers long-range disordered ...
Efeitos de flutuações quânticas em um modelo vidro de spin com cluster
(Universidade Federal de Santa Maria, 2019-05-29)
In this work we study the effects of quantum fluctuations in a disordered magnetic system.
We consider a cluster-spin Ising model with antiferromagnetic short range interactions (J0)
and disordered long range interactions ...