威廉希尔williamhill官方网站材料科学与工程研究院《材料科学论坛》学术报告

报告时间：2025年9月8日上午10:30-12:00

报告人：Byong-Guk Park（Materials Science and Engineering, KAIST, Daejeon Korea）

报告地点：威廉希尔williamhill官方网站逸夫技术科学楼A205学术报告厅

邀请人：宋成老师

报告题目：Material development for field-free spin-orbit torque switching

报告简介：

Spin-orbit torque (SOT), arising from spin currents generated by spin-orbit coupling, has attracted significant attention due to its potential for efficient magnetization switching in spintronic devices, particularly magnetic random-access memory (MRAM). However, in homogeneous structures, SOT switching is not purely electrical an additional in-plane magnetic field is required to achieve deterministic switching, which limits its practicability for device applications. Therefore, for the widespread application of SOT technologies, it is essential to achieve field-free SOT switching of perpendicular magnetization while simultaneously reducing the switching current density.

In this talk, He will present various SOT materials that efficiently generate out-of-plane spin currents and the associated SOTs, enabling a reduction in field-free switching current. These include magnetic and antiferromagnetic trilayers, as well as side-gated structures. He will also introduce novel SOT-based spintronic applications, such as spin logics, physically unclonable functions (PUFs), and probabilistic bits.

报告人简介：

Prof. Byong-Guk Park received his Ph.D. in Materials Science and Engineering from KAIST in 2003. He subsequently worked as a post-doctoral researcher at the University of Twente in the Netherlands (2003 – 2006) and as a research scientist at the Hitachi Cambridge Laboratory in the UK (2006 – 2011). In December 2011, he joined the Department of Materials Science and Engineering at KAIST, where he is a professor. As the Principal Investigator of the Nano Spintronics Laboratory, he has been working on understanding spin transport in materials and utilizing it for solid-state device applications. In particular, he has developed material systems that efficiently generate spin currents and the associated spin-orbit torques, engineered electric field-controlled magnetic properties, and explored novel spintronic device applications, including spin-based logics, spin Hall nano-oscillators, spintronic security devices.