中国物理B ›› 2025, Vol. 34 ›› Issue (10): 107504-107504.doi: 10.1088/1674-1056/ade06d

所属专题： SPECIAL TOPIC — Advanced magnonics

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Temperature and angle dependence of magnetic damping in manganite thin films

Jinghua Ren(任京华)1,2,†, Yuelin Zhang(张跃林)1,2,†,‡, Miming Cai(蔡米铭)1,2,†, Yuhan Li(李语涵)1,2, Mingming Li(李明明)3, Tianqi Wang(王天琦)1,2, Dekun Shen(沈德坤)1,2, Hongyu Zhou(周鸿渝)1,2, Xiangwei Zhu(朱祥维)4, and Jinxing Zhang(张金星)1,2,§   

  1. 1 School of Physics and Astronomy, Beijing Normal University, Beijing 100875, China;
    2 Key Laboratory of Multiscale Spin Physics, Ministry of Education, Beijing 10087, China;
    3 School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China;
    4 School of Electronics and Communication Engineering, Sun Yat-Sen University, Shenzhen 518107, China
  • 收稿日期:2025-03-31 修回日期:2025-05-13 接受日期:2025-06-04 发布日期:2025-10-11
  • 通讯作者: Yuelin Zhang, Jinxing Zhang E-mail:yuelin.zhang@bnu.edu.cn;jxzhang@bnu.edu.cn
  • 基金资助:
    This work was supported by the National Key Research and Development Program of China (Grant Nos. 2023YFA1406500, J.Z.; 2021YFA0718700, J.Z.), the National Natural Science Foundation of China (Grant Nos. T2350005, J.Z.; 12404119, Y.Z.; 52225205, J.Z.), the Beijing Natural Science Foundation (Grant No. Z240008, J.Z.), and the Fundamental Research Funds for the Central Universities (Y.Z. and J.Z.).

Temperature and angle dependence of magnetic damping in manganite thin films

Jinghua Ren(任京华)1,2,†, Yuelin Zhang(张跃林)1,2,†,‡, Miming Cai(蔡米铭)1,2,†, Yuhan Li(李语涵)1,2, Mingming Li(李明明)3, Tianqi Wang(王天琦)1,2, Dekun Shen(沈德坤)1,2, Hongyu Zhou(周鸿渝)1,2, Xiangwei Zhu(朱祥维)4, and Jinxing Zhang(张金星)1,2,§   

  1. 1 School of Physics and Astronomy, Beijing Normal University, Beijing 100875, China;
    2 Key Laboratory of Multiscale Spin Physics, Ministry of Education, Beijing 10087, China;
    3 School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China;
    4 School of Electronics and Communication Engineering, Sun Yat-Sen University, Shenzhen 518107, China
  • Received:2025-03-31 Revised:2025-05-13 Accepted:2025-06-04 Published:2025-10-11
  • Contact: Yuelin Zhang, Jinxing Zhang E-mail:yuelin.zhang@bnu.edu.cn;jxzhang@bnu.edu.cn
  • Supported by:
    This work was supported by the National Key Research and Development Program of China (Grant Nos. 2023YFA1406500, J.Z.; 2021YFA0718700, J.Z.), the National Natural Science Foundation of China (Grant Nos. T2350005, J.Z.; 12404119, Y.Z.; 52225205, J.Z.), the Beijing Natural Science Foundation (Grant No. Z240008, J.Z.), and the Fundamental Research Funds for the Central Universities (Y.Z. and J.Z.).

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摘要： Magnonics and magnonic materials have attracted widespread interest in the spintronics community and demonstrate potential for applications in the next generation of information technology. Recent advances in manganite thin films highlight their promise for magnonics, in which enhanced film quality and strain control of spin and electronic structures play a crucial role in reducing magnetic damping. Here, we report the fabrication of La$_{0.67}$Sr$_{0.33}$MnO$_{3}$ thin films of varying quality via pulsed laser deposition. The quality of epitaxial films is characterized using atomic force microscopy and x-ray diffraction. A pronounced fourfold anisotropy in the magnetic damping (with a ratio of about 150%) is observed, where the minimum damping occurs along the [110] crystalline orientation. Notably, improved sample quality significantly reduces the magnetic damping at low temperatures. The highest-quality sample, featuring atomic-scale terraces, exhibits a magnetic damping of $\sim 2.5\times 10^{-3}$ at 5 K. Our results not only demonstrate effective reduction of low-temperature magnetic damping in high-quality correlated oxide systems but also provides a strategy and material platform for exploring novel quantum phenomena and for designing low-temperature magnonic devices.

关键词: ferromagnetic resonance, correlated manganite thin film, magnetic damping

Abstract: Magnonics and magnonic materials have attracted widespread interest in the spintronics community and demonstrate potential for applications in the next generation of information technology. Recent advances in manganite thin films highlight their promise for magnonics, in which enhanced film quality and strain control of spin and electronic structures play a crucial role in reducing magnetic damping. Here, we report the fabrication of La$_{0.67}$Sr$_{0.33}$MnO$_{3}$ thin films of varying quality via pulsed laser deposition. The quality of epitaxial films is characterized using atomic force microscopy and x-ray diffraction. A pronounced fourfold anisotropy in the magnetic damping (with a ratio of about 150%) is observed, where the minimum damping occurs along the [110] crystalline orientation. Notably, improved sample quality significantly reduces the magnetic damping at low temperatures. The highest-quality sample, featuring atomic-scale terraces, exhibits a magnetic damping of $\sim 2.5\times 10^{-3}$ at 5 K. Our results not only demonstrate effective reduction of low-temperature magnetic damping in high-quality correlated oxide systems but also provides a strategy and material platform for exploring novel quantum phenomena and for designing low-temperature magnonic devices.

Key words: ferromagnetic resonance, correlated manganite thin film, magnetic damping

中图分类号:  (Spin waves)

  • 75.30.Ds
76.50.+g (Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance) 31.15.aq (Strongly correlated electron systems: generalized tight-binding method)