柔性衬底提供的机械应变对非晶SmCo薄膜磁性的调控
Magnetic Property Tunability of Amorphous SmCo Thin Films by Mechanical Strain Supplied by Flexible Substrates
梁文会 1王雨桐 2苏鉴 3章明 4胡凤霞 5张健 6刘艳丽 4任瀚洋 6王晶 3沈保根7
作者信息
- 1. 清华大学物理系,北京 100084;清华大学量子信息前沿科学中心,北京 100084;中国科学院物理研究所,北京 100190
- 2. 清华大学物理系,北京 100084;清华大学量子信息前沿科学中心,北京 100084
- 3. 中国科学院物理研究所,北京 100190;中国科学院大学物理科学学院,北京 100190
- 4. 内蒙古科技大学理学院,内蒙古包头 014010
- 5. 中国科学院物理研究所,北京 100190;中国科学院大学物理科学学院,北京 100190;松山湖材料实验室,广东东莞 523808
- 6. 中国科学院宁波材料技术与工程研究所,浙江宁波 315201
- 7. 中国科学院物理研究所,北京 100190;中国科学院大学物理科学学院,北京 100190;中国科学院宁波材料技术与工程研究所,浙江宁波 315201
- 折叠
摘要
将非晶SmCo薄膜沉积在弯曲的柔性聚对苯二甲酸乙二醇酯(PET)衬底上,薄膜厚度范围为10～150 nm.薄膜沉积结束后,当PET衬底从凹/凸变平时,非晶SmCo薄膜受到拉伸/压缩应变.结果表明,应变既可以调控SmCo/PET的剩余磁化强度,也可以调控其磁滞回线的方形度.与压缩应变相比,拉伸应变对非晶SmCo磁性的调控幅度更大.非晶SmCo薄膜的磁性之所以能够被柔性衬底提供的机械应变所调控是因为非晶SmCo薄膜具有负磁致伸缩特性.当负磁致伸缩效应发生时,拉伸应变会阻碍非晶SmCo薄膜的磁化过程,而压缩应变则会促进非晶SmCo薄膜的磁化过程.非晶SmCo/PET在开发柔性自旋电子器件和柔性微纳电子器件方面具有巨大潜力.
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.
关键词
非晶SmCo薄膜/柔性衬底/应变/磁性Key words
amorphous SmCo thin film/flexible substrates/strain/magnetic properties引用本文复制引用
基金项目
National Key Research and Development Program of China(2022YFB3505201)
National Key Research and Development Program of China(2021YFB3501202)
National Natural Science Foundation of China(52088101)
National Natural Science Foundation of China(92263202)
出版年
2024
NETL
NSTL
万方数据