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Control of ferromagnetic Curie temperature and topological Hall effect in chromium telluride thin films

ORAL

Abstract

Chromium telluride (Cr1-δTe) has been known as a p-type ferromagnetic metal with varied Curie temperatures (Tc = 170 K – 340 K). Recently report of topological Hall effect (THE) suggested the skyrmion phase formation (Nano Research, 11, 3116 (2017)). However, the origin of THE as well as the various Tc among the Cr1-δTe phases was not clearly understood yet. Here, we investigate two different types of Cr1-δTe thin films with different Tc via different growth conditions to understand the origin of the various Tc. We also discuss the THE-like signal in our Hall measurements, with complementary microscopic and spectroscopic evidences, to address the origin of observed THE-like signal in this peculiar magnetic thin film system.

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Presenters

  • In Hak Lee

    Department of Physics, University of Seoul, Seoul 02504, Republic of Korea, Department of Physics, University of Seoul, Republic of Korea

Authors

  • In Hak Lee

    Department of Physics, University of Seoul, Seoul 02504, Republic of Korea, Department of Physics, University of Seoul, Republic of Korea

  • Byoung Ki Choi

    Department of Physics, University of Seoul, Seoul 02504, Republic of Korea, Department of Physics, University of Seoul, Republic of Korea

  • Hyuk Jin Kim

    University of Seoul, Department of Physics, University of Seoul, Seoul 02504, Republic of Korea

  • Min Jae Kim

    Department of Physics, University of Seoul, Seoul 02504, Republic of Korea

  • Kyeong Jun Lee

    Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea

  • Tae Yang Choi

    Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea

  • Seo Hyoung Chang

    Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea, Department of Physics, Chung-Ang University

  • Hu Young Jeong

    UNIST Central Research Facilities (UCRF) and School of Materials Science and Engineering, UNIST, Ulsan, Republic of Korea, UNIST Central Research Facilities (UCRF), Ulsan National Institute of Science and Technology

  • Younghak Kim

    Pohang Accelerator Laboratory, Pohang 37673, Korea, Pohang Accelerator Laboratory, POSTECH, Pohang, 37673, Republic of Korea

  • Suyoun Lee

    Center for Electronic Materials, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea

  • Young Jun Chang

    University of Seoul, Department of Physics, University of Seoul, Seoul 02504, Republic of Korea, Department of Physics, University of Seoul, Republic of Korea