Cooperative control of perpendicular magnetic anisotropy via crystal structure and orientation in freestanding SrRuO3 membranes

Lu, Zengxing; Yang, Yongjie; Wen, Liang; Feng, Jiatai; Lao, Bin; Zheng, Xuan; Sheng, L.; Zhao, Kenan; Cao, Bingshan; Ren, Zeliang; Song, Dongsheng; Du, Haifeng; Guo, Yuanyuan; Zhong, Zhicheng; Hao, Xianfeng; Wang, Zhiming; Li, Run-Wei

doi:10.1038/s41528-022-00141-3

Cited by 26 publications

(28 citation statements)

References 56 publications

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“…The presence of defects such as dislocations in the membranes may lead to local disorder of the crystal structure and thus increase the degrees of freedom of the crystal framework, which could be beneficial to the super-flexibility of freestanding SrRuO 3 membranes. − Therefore, the freestanding membranes are more likely to be deformed and even buckled under external force. From a microscopic point of view, large stress could induce structural transition accompanying a prominent distortion of the Ru–O bonds and Ru–O–Ru bond angles, , and this distortion may tolerate great structural deformation, which may contribute to the super-flexibility of freestanding SrRuO 3 membranes. Consequently, the observed reduction in Young’s modulus predominantly originated due to defect-induced chemical bond damage and stress relaxation caused by the detachment of membranes from the substrate …”

Section: Resultsmentioning

confidence: 99%

Super-flexibility in Freestanding Single-Crystal SrRuO₃ Conductive Oxide Membranes

Wen

Zhang

et al. 2022

ACS Appl. Electron. Mater.

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Conductive oxides are considered to be attractive electrodes in electronic applications such as piezoelectric, energy storage, and semiconductor devices due to their good electrical conductivity and compatibility with other functional oxides. However, conductive oxides are generally brittle, which limits their applications in flexible electronic devices. Here, freestanding single-crystal SrRuO 3 membranes have been prepared by etching a sacrificial layer. The prepared membranes can be buckled into sinusoidal shapes of different sizes, indicating that the membranes are super-flexible. The mechanical properties were performed on the well-strained membranes, and the Young's modulus of the 12 nm-thick SrRuO 3 membrane was found to be 34.65 GPa via the buckling method, which is approximately 21% of the bulk SrRuO 3 . The corresponding super-flexibility mechanism is attributed to the high defect density and small specific surface area. The SrRuO 3 films maintain the resistivity before and after transferring in the range of 1.4 × 10 −4 to 5.2 × 10 −4 Ω cm that can be used as electrode materials. This work provides a realistic strategy for the superflexibility transition of the single-crystal SrRuO 3 conductive oxide membranes from brittleness, which paves the way for their application in flexible electronics devices.

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Section: Resultsmentioning

confidence: 99%

Super-flexibility in Freestanding Single-Crystal SrRuO₃ Conductive Oxide Membranes

Wen

Zhang

et al. 2022

ACS Appl. Electron. Mater.

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“…膜。并且 SAO 牺牲层以水作为刻蚀剂，释放过程中对外延生长的目标薄膜没有损伤，这些优异特性展现了 SAO 作为牺牲层材料的应用潜力。之后 Lu [12] 等利用该方法外延生长了自支撑 LSMO 薄膜并成功的将其转移到聚二甲基硅氧烷 (polydimethylsiloxane, PDMS)薄膜上。如图 3(a)就是利用柔性 PDMS 转移自支撑单晶薄膜的典型过程 [25] 质量也更高；2022 年，Lu 等 [41] 合成了一系列不同化学计量比的 Ca 1-x Sr x Al 2 O 6 薄膜作为牺牲层并成功制备了自支撑 SrRuO 3 单晶薄膜，进一步实现了牺牲层晶胞参数的可调。当然，近年来还有其他种类的氧化物牺牲层也是被开发出来用于制备各种自支撑单晶氧化物薄膜，例如 SrVO 3 [42] 、YBa 2 Cu 3 O (7-x) [43] 、SrRuO 3 [37] 、 SrCoO 2.5 [44] 、VO 2 [30] 、BaO [45] 、MgO [46]…”

Section: 自支撑单晶氧化物薄膜的制备unclassified

Research progress of applications of freestanding single crystal oxide thin film

Peng¹,

Dong²,

Liu³

2023

Acta Phys. Sin.

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Flexible electronics are of great interest to researchers because of their wide applications such as information storage, energy harvesting and wearable device. To realize extraordinary functionalities, freestanding single crystal oxide thin film is applied due to its super elasticity, easy-to-transfer, and outstanding ferro/electric/magnetic properties. Owing to state-of-art synthesis methods, functional oxide film of various materials can be obtained in freestanding phase, which eliminates the restrictions from growth substrate and can be transferal to other flexible layers. In this paper, we firstly introduce wet etching and mechanical exfoliation methods applied to prepare freestanding single crystal oxide thin film, then review their applications in ferroelectric memory, piezoelectric energy harvester, dielectric energy storage, correlated oxide interface, and novel freestanding oxide structure. Summary of recent research progress and future outlooks are finally discussed.

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“…[ 14–16 ] Meanwhile, the varied lattice orientation of substrates also can provide different interfacial strain conditions such as uniaxial or biaxial stress for epitaxial overlayer. [ 13,17–19 ]…”

Section: Introductionmentioning

confidence: 99%

The Modulated Magnetic Domain Structure in the La_0.67Sr_0.33MnO₃ Ferromagnetic Films by Strain Engineering

Shi

Zhang

Wang

et al. 2023

Physica Status Solidi (a)

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Novel magnetic domain structures attract much attention due to their potential applications in the high performance of spintronic devices. Herein, the magnetic domains of La0.67Sr0.33MnO3 (LSMO) thin films, which epitaxially grown on (100)‐, (110)‐, and (111)‐oriented (LaAlO3)0.3(Sr2AlTaO6)0.7 (LSAT) substrates, are systematically investigated. The (100)‐ and (110)‐LSMO films show a stripe domain pattern. After in‐plane magnetic field saturation, the direction of the stripe domains in (100)‐LSMO no longer rotates with the change of magnetic field, while the stripe domains in (110)‐LSMO rotate continuously. The (111)‐LSMO films produce randomly distributed bubble‐like magnetic domains, which gradually connect into strips with the increase of the external magnetic field, and the stability of the magnetic domain in (111)‐LSMO is better than the ones in (100)‐ and (110)‐LSMO under a magnetic field. In addition, it is found that with the increase of thickness, the random domains in (111)‐LSMO films are gradually transformed into mazy domains. These phenomena can be understood by the regulable strain anisotropy and the magnetic anisotropy. Herein, an effective way is suggested to modify the magnetization anisotropy and magnetic domain because spin polarization depends strongly on the crystal surface orientation as well as epitaxial strain.

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Cooperative control of perpendicular magnetic anisotropy via crystal structure and orientation in freestanding SrRuO3 membranes

Cited by 26 publications

References 56 publications

Super-flexibility in Freestanding Single-Crystal SrRuO₃ Conductive Oxide Membranes

Super-flexibility in Freestanding Single-Crystal SrRuO₃ Conductive Oxide Membranes

Research progress of applications of freestanding single crystal oxide thin film

The Modulated Magnetic Domain Structure in the La_0.67Sr_0.33MnO₃ Ferromagnetic Films by Strain Engineering

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Cooperative control of perpendicular magnetic anisotropy via crystal structure and orientation in freestanding SrRuO3 membranes

Cited by 26 publications

References 56 publications

Super-flexibility in Freestanding Single-Crystal SrRuO3 Conductive Oxide Membranes

Super-flexibility in Freestanding Single-Crystal SrRuO3 Conductive Oxide Membranes

Research progress of applications of freestanding single crystal oxide thin film

The Modulated Magnetic Domain Structure in the La0.67Sr0.33MnO3 Ferromagnetic Films by Strain Engineering

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Super-flexibility in Freestanding Single-Crystal SrRuO₃ Conductive Oxide Membranes

Super-flexibility in Freestanding Single-Crystal SrRuO₃ Conductive Oxide Membranes

The Modulated Magnetic Domain Structure in the La_0.67Sr_0.33MnO₃ Ferromagnetic Films by Strain Engineering