Dresden 2017 – scientific programme

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MA: Fachverband Magnetismus

MA 65: Poster 2

MA 65.14: Poster

Friday, March 24, 2017, 09:30–13:00, P2-OG1

The quadratic magnetooptic tensor of cubic materials without inversion symmetry — •Robin Silber^1,2, Jan-Oliver Dreessen², Jaromír Pištora¹, Günter Reiss², Martin Veis³, Jaroslav Hamrle³, and Timo Kuschel^2,4 — ¹VSB - Technical University of Ostrava, Czech Republic — ²CSMD, Physics Department, Bielefeld University, Germany — ³Charles University, Prague, Czech Republic — ⁴University of Groningen, The Netherlands

The permittivity tensor of a magnetized crystal could be described by a Taylor series: ε_ij=ε_ij⁽⁰⁾+ε_ij⁽¹⁾+ε_ij⁽²⁾+... , where the superscript denotes the order in magnetization (M). The shape of ε_ij⁽²⁾ is determined by the so-called quadratic magnetooptic (MO) tensor G_ijkl [1]. This quadratic MO tensor for cubic materials with and without inversion symmetry differ in the parameter Δ Γ=(G₁₂−G₂₁) [2], being zero for cubic material with inversion symmetry as G₁₂=G₂₁. The Δ Γ parameter was predicted by symmetry arguments of the structure, but no experimental determination method exists so far. Here, we propose a new measurement procedure of magnetooptic Kerr effect (MOKE), allowing us to separate contribution of ΔΓ to overall MOKE signal.

[1] Š. Višňovský, Czech. J. Phys. B 36, 1424 (1986)
[2] J. Hamrlová et al., Phys. Status Solidi B 250, 2194 (2013)