Dresden 2026 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 88: Spin Transport and Orbitronics, Spin-Hall Effects II (joint session MA/TT)

TT 88.6: Talk

Thursday, March 12, 2026, 16:15–16:30, POT/0361

Thermally Activated Spin Transport in a Multiferroic LiCu₂O₂/Pt Heterostructure — •Mathew James, Ankita Nayak, István Kézsmárki, and Aisha Aqeel — University of Augsburg, 86159 Augsburg, Germany

Multiferroics, in which electric and magnetic orders are coupled, are potential materials for low-power spintronic devices. LiCu₂O₂ is a Type II multiferroic material known to exhibit spiral (non-collinear) spin ordering below its antiferromagnetic transition temperature, T_N ≈ 23 K [1]. In this material, the magnetic Cu²⁺ ions form double chains along the crystallographic b-axis, resulting in a double-leg spin-ladder configuration.

In this study, we use the Spin Seebeck Effect (SSE) as an electric probe to investigate the thermally activated magnetic response of LiCu₂O₂ across different magnetic configurations. In the SSE, a temperature gradient across a magnetic insulator generates non-equilibrium magnons that carry a spin current. This spin current is converted into a measurable voltage in a heavy-metal layer deposited on top of the insulator, via the Inverse Spin Hall Effect [2]. Our preliminary results indicate that the SSE voltage is sensitive to the spiral ordering in LiCu₂O₂. References: [1]S. Park, et al., Phys. Rev. Lett., 98, 5 (2007). [2]K. Uchida et al., Nature, vol. 455, no. 7214, (2008).

Keywords: Spin Seebeck Effect; Multiferroics