Volume 125, Number 3, February 2019
|Number of page(s)||5|
|Published online||08 March 2019|
Magnetic anisotropy Berry's phase
1 LPQSD, Faculté des Sciences, Université Ferhat Abbas Sétif 1 - Sétif 19000, Algeria
2 Institut de Chimie (UMR 7177 CNRS- Unistra), Université de Strasbourg - 4 Rue Blaise Pascal, CS 90032, 67081 Strasbourg cedex, France
3 Laboratoire de Physique des Matériaux et ses applications, Faculté des Sciences, Université Mohamed Boudiaf- M'sila - M'sila 28000, Algeria
Received: 1 May 2018
Accepted: 5 February 2019
By considering the intrinsic anisotropy, present in almost all magnetic systems, as a perturbation to the usual Zeeman term, we show that the spin-spin dipolar interaction also known as zero-field splitting (ZFS) leads to an extra geometrical phase in addition to the conventional Berry's phase. Furthermore, we suggest some ways to observe the energy shift in electron paramagnetic resonance spectra due to Berry's phase and how we can separate it from the conventional Zeeman Berry's phase.
One of the authors (MM) dedicates this work to the memory of his mother, Djabou Zoulikha, who died on 3 February 2019.
PACS: 03.65.Vf – Phases: geometric; dynamic or topological / 75.30.Gw – Magnetic anisotropy / 76.30.-v – Electron paramagnetic resonance and relaxation
© EPLA, 2019
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