Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 65: Poster 2

MA 65.19: Poster

Freitag, 24. März 2017, 09:30–13:00, P2-OG1

Chiral magnetism of Fe intercalated TaSe₂ and NbSe₂ — •Hemza Kouarta^1,2, Jonathan Chico², Hafid Belkhir¹, and Samir Lounis² — ¹Faculty of Science, Department of Physics, Laboratory Studies of Surfaces and Interfaces of Solid Materials (LESIMS), University of Badji Mokhtar, P.O. Box 12, Annaba 23000, Algeria — ²Peter Grünberg Institut and Institute of Advanced Simulation, Forschungszentrum Jülich & JARA, D-52428, Jülich, Germany

Transition metal dichalcogenides have been extensively studied due to the quasi two dimensional structure of the trilayers that compose it. The intercalation of Fe in the Ta(Nb)Se₂ compounds, has been observed to give rise to ferromagnetic (antiferromagnetic) order, and in the case of Ta a large magnetrocrystalline anisotropy energy (MAE) has been measured[1].

We perform fully relativistic first-principles simulations on these two materials considering alloying Nb and Ta at different concentrations, i.e. Fe_1/4Ta_1−xNb_xSe₂. We investigate the Heisenberg magnetic exchange interactions, Dzyaloshinkii-Moriya interactions and the MAE and shine light on their microscopic origins. All of that with the objective of studying the impact of substitutional disorder in the magnetic properties of these compounds, while also allowing the exploration of the phase transition between the ferromagnetic and antiferromagnetic states present in the stochiometric compounds.

[1] K.-T Ko et al.Phys. Rev. Lett., 107, 247201 (2011)