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柔性襯底提供的機(jī)械應(yīng)變對(duì)非晶SmCo薄膜磁性的調(diào)控
作者:
作者單位:

1.清華大學(xué) 物理系，北京 100084;2.清華大學(xué) 量子信息前沿科學(xué)中心，北京 100084;3.中國(guó)科學(xué)院 物理研究所，北京 100190;4.中國(guó)科學(xué)院大學(xué) 物理科學(xué)學(xué)院，北京 100190;5.松山湖材料實(shí)驗(yàn)室，廣東 東莞 523808;6.中國(guó)科學(xué)院 寧波材料技術(shù)與工程研究所，浙江 寧波 315201;7.內(nèi)蒙古科技大學(xué) 理學(xué)院，內(nèi)蒙古 包頭 014010

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基金項(xiàng)目:

國(guó)家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目），國(guó)家重點(diǎn)研發(fā)計(jì)劃


Magnetic Property Tunability of Amorphous SmCo Thin Films by Mechanical Strain Supplied by Flexible Substrates
Author:
Affiliation:

1.Department of Physics, Tsinghua University, Beijing 100084, China;2.Frontier Science Center for Quantum Information, Tsinghua University, Beijing 100084, China;3.Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;4.School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;5.Songshan Lake Materials Laboratory, Dongguan 523808, China;6.Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;7.School of Science, Inner Mongolia University of Science and Technology, Baotou 014010, China

Fund Project:

National Key Research and Development Program of China (2022YFB3505201, 2021YFB3501202); National Natural Science Foundation of China (52088101, 92263202)

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    摘要:

    將非晶SmCo薄膜沉積在彎曲的柔性聚對(duì)苯二甲酸乙二醇酯（PET）襯底上，薄膜厚度范圍為10~150 nm。薄膜沉積結(jié)束后，當(dāng)PET襯底從凹/凸變平時(shí)，非晶SmCo薄膜受到拉伸/壓縮應(yīng)變。結(jié)果表明，應(yīng)變既可以調(diào)控SmCo/PET的剩余磁化強(qiáng)度，也可以調(diào)控其磁滯回線的方形度。與壓縮應(yīng)變相比，拉伸應(yīng)變對(duì)非晶SmCo磁性的調(diào)控幅度更大。非晶SmCo薄膜的磁性之所以能夠被柔性襯底提供的機(jī)械應(yīng)變所調(diào)控是因?yàn)榉蔷mCo薄膜具有負(fù)磁致伸縮特性。當(dāng)負(fù)磁致伸縮效應(yīng)發(fā)生時(shí)，拉伸應(yīng)變會(huì)阻礙非晶SmCo薄膜的磁化過程，而壓縮應(yīng)變則會(huì)促進(jìn)非晶SmCo薄膜的磁化過程。非晶SmCo/PET在開發(fā)柔性自旋電子器件和柔性微納電子器件方面具有巨大潛力。

    Abstract:

    Amorphous SmCo thin films with thickness of 10–150 nm were deposited on the flexible polyethylene terephthalate (PET) substrates. Tensile/compressive strain was generated in the amorphous SmCo thin film when PET substrate was flattened from concave/convex shape after thin film deposition. Results show that both the normalized remanent magnetization and the squareness of hysteresis loops of SmCo/PET can be tuned by the strain. Compared with that induced by compressive strain, the tunable amplitude induced by tensile strain is larger for the amorphous SmCo thin films. Because the amorphous SmCo thin film has negative magnetostrictive property, the magnetic properties of amorphous SmCo thin film can be controlled by the mechanical strain supplied by flexible substrates. When the negative magnetostriction effect occurs, the magnetization process of amorphous SmCo thin films is hindered by the tensile strain, whereas it is promoted by the compressive strain. The amorphous SmCo/PET shows great potential in the field of flexible spintronic devices and flexible micro-nano electronic devices.

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梁文會(huì),王雨桐,蘇鑒,章明,胡鳳霞,張健,劉艷麗,任瀚洋,王晶,沈保根.柔性襯底提供的機(jī)械應(yīng)變對(duì)非晶SmCo薄膜磁性的調(diào)控[J].稀有金屬材料與工程,2024,53(2):345~349.[Liang Wenhui, Wang Yutong, Su Jian, Zhang Ming, Hu Fengxia, Zhang Jian, Liu Yanli, Ren Hanyang, Wang Jing, Shen Baogen. Magnetic Property Tunability of Amorphous SmCo Thin Films by Mechanical Strain Supplied by Flexible Substrates[J]. Rare Metal Materials and Engineering,2024,53(2):345~349.]
DOI：10.12442/j. issn.1002-185X.20230415

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  • 收稿日期:2023-07-02
  • 最后修改日期:2023-07-25
  • 錄用日期:2023-07-28
  • 在線發(fā)布日期: 2024-02-27
  • 出版日期: 2024-02-23