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A room-temperature magnetic semiconductor from a Co-Fe-Nb-B metallic glass

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Abstract

Magnetic semiconductors with Curie temperatures higher than room temperature show potential for developing spintronic devices with combined data processing and storage functions for next-generation computing systems. In this study, we present an n-type Co19.8Fe8.6Nb4.3B6.0O61.3 magnetic semiconductor with a high Curie temperature of ∼559 K. This magnetic semiconductor has a room-temperature resistivity of ∼2.10 × 104 Å cm and a saturation magnetization of ∼76 emu/cm3. The n-type Co19.8Fe8.6Nb4.3B6.0O61.3 magnetic semiconductor was deposited on p-type silicon to form a heterojunction, exhibiting a rectifying characteristic. Our results provide the design principles for discovering high Curie temperature magnetic semiconductors with determined conduction types, which would play an essential role in realizing nonvolatile spin-based transistors that break free from the confines of currently established Si-based information technology.

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Authors and Affiliations

  1. Laboratory for Advanced Materials Processing Technology (MOE), State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China

    Yu-Zhang Jiao, Ke-Fu Yao & Na Chen

  2. Key Laboratory for Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China

    Yu-Zhang Jiao, Zheng-Jun Zhang & Na Chen

  3. Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Sendai, 980-8577, Japan

    Dmitry V. Louzguine-Luzgin

  4. Mathematics for Advanced Materials-OIL, National Institute of Advanced Industrial Science and Technology (AIST), Sendai, 980-8577, Japan

    Dmitry V. Louzguine-Luzgin

Authors
  1. Yu-Zhang Jiao
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  2. Dmitry V. Louzguine-Luzgin
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  3. Ke-Fu Yao
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  4. Zheng-Jun Zhang
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  5. Na Chen
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Correspondence to Na Chen.

Additional information

This work was supported by the National Natural Science Foundation of China (Grant No. 51922053).

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Jiao, YZ., Louzguine-Luzgin, D.V., Yao, KF. et al. A room-temperature magnetic semiconductor from a Co-Fe-Nb-B metallic glass. Sci. China Phys. Mech. Astron. 66, 246111 (2023). https://doi.org/10.1007/s11433-022-2042-x

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  • DOI: https://doi.org/10.1007/s11433-022-2042-x

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