DataVXAdvanced Optical MaterialsPaper
journal article·2024-05

Quantifying Spin‐Charge Conversion Mechanisms for THz Emission in Magnetic Multilayers

Yunxiu Zhao, Anabil Gayen, Lin Huang, Xiao You, Nguyen Le Thi, Qoimatul Mustaghfiroh, Fathiya Rahmani, Prashant Vijay Gaikwad, Pham Duc Huyen Yen, Je‐Ho Shim, Dong Eon Kim, Hee Jun Shin, Jaehun Park, Caihua Wan, Ou Xiang, Hong‐Guang Piao, Kyung‐Ho Kim, Junhyeok Bang, Hyun Seok Lee, Kyung Wan Kim, Dong‐Hyun Kim

Advanced Optical Materials· Volume 12· Issue 14
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Source abstract

Abstract

Abstract Ultrafast control of both electric and spin currents triggered by femtosecond laser pulse has attracted much attention due to future applications for broadband THz emitter as well as high‐speed spintronic devices. Optically generated spin current is converted to charge current via multiple spin‐charge conversion mechanisms, generating THz wave emission in magnetic multilayers. However, to date, quantitative and comparative investigation of THz emission originating from spin‐charge conversion mechanisms has not yet been fully explored. Here, direct and straightforward nondestructive probing to measure THz emission is provided at original Co/Pt and Co/Ta interfaces embedded in Pt/Co/Ta multilayers with polarization analysis of both optical pump and THz emission. These results allow a fundamental understanding of various spin‐charge conversion phenomena, which is a key basis for future spintronic THz source development.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Magnetic properties of thin films · Quantum and electron transport phenomena · Physics of Superconductivity and Magnetism

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics Chungbuk National University Cheongju 28644 South Korea

School of Engineering Westlake University Hangzhou 310024 China

Key Laboratory of Advanced Materials School of Materials Science and Engineering Tsinghua University Beijing 100084 China

Department of Physics and Center for Attosecond Science and Technology POSTECH Pohang 37673 South Korea

Department of Physics Yanbian University Yanbian 133002 China

Pohang Accelerator Laboratory POSTECH Pohang 37673 South Korea

Institute of Physics Chinese Academy of Science Beijing 100190 China

Manufacturing department Yangtze Memory Technologies Co., Ltd. (YMTC) Wuhan 430073 China

Funding

National Research Foundation of Korea · Ministry of Science and ICT, South Korea

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