Enhanced magneto-optical effects in composite coaxial nanowires embedded with Ag nanoparticles

Liu, Qianwen; Zheng, Xiang; He, Jialun; Wang, Weiping; Fu, Mingming; Cao, Yiyan; Li, Heng; Wu, Yaping; Chen, Ting; Zhang, Chunmiao; Chen, Xiaohong; Yu, Bo; Li, Shuping; Kang, Junyong; Wu, Zhiming

doi:10.1038/srep29170

Cited by 3 publications

(2 citation statements)

References 35 publications

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“…Among the different nanometric structures, nanowires are the focus of different research groups due to their high aspect ratio, physicochemical properties, together with outstanding mechanical, electrical, magnetic and optical properties, which can also be controlled by varying their geometrical parameters. Furthermore, nanowires are used in many technological applications in different fields like nanoelectronics 3,4 , magneto-optoelectronics [5][6][7][8] , magneto-plasmonics 9 and even in wearable electronic systems 10 , among others.…”

Section: Introductionmentioning

confidence: 99%

Information storage in permalloy modulated magnetic nanowires

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Díaz

Cisternas

et al. 2021

Preprint

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A long piece of magnetic material shaped as a central cylindrical wire (diameter d = 50 nm) with two wider coaxial cylindrical portions (diameter D = 90 nm and thickness t = 100 nm) defines a bimodulated nanowire. Micromagnetism is invoked to study the equilibrium energy of the system under the variations of the positions of the modulations along the wire. The system can be thought of as composed of 5 independent elements (3 segments and 2 modulations) leading to 25 = 32 different magnetic configurations. We investigate the stability of the configurations depending on the positions of the modulations. The relative chirality of the modulations has negligible contributions to the energy and they have no effect in the stability of the stored configuration. However, the modulations are extremely important in pinning the domain walls that lead to consider each segment as independent from the rest. A phase diagram reporting the stability of the inscribed magnetic configurations is produced. The stability of the system was then tested under the action of external magnetic fields and it is found that more than 50 mT are necessary to alter the inscribed information. The main purpose of this paper is to find weather a prototype like this can complemented to be used as firmware or magnetic keys. Present results indicate that this is feasible.

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Section: Introductionmentioning

confidence: 99%

Information storage in permalloy modulated magnetic nanowires

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Díaz

Cisternas

et al. 2021

Preprint

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“…Metallic or metal oxide nanowires (NWs) and nanotubes are 1D nanomaterials that have attracted great attention among the scientific community during previous decades because of their unique features and peculiar physicochemical properties, which have become appealing for a wide range of technological applications, including nanoelectronics [1][2][3], magneto-optoelectronics [4,5], semiconducting plasmonics, and magneto-plasmonics [6][7][8], and soft wearable electronic systems [9], among many others. This kind of 1D nanomaterial offers particular advantages due to its intrinsic high aspect ratio, peculiar microstructural characteristics, together with outstanding mechanical, electrical, magnetic, and optical properties, which enable their integration in novel energy conversion devices and data storage media, future stretchable electronic systems, sensors, and micro-nanodevices [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Ni-Co Alloy and Multisegmented Ni/Co Nanowire Arrays Modulated in Composition: Structural Characterization and Magnetic Properties

et al. 2017

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Design of novel multisegmented magnetic nanowires can pave the way for the next generation of data storage media and logical devices, magnonic crystals, or in magneto-plasmonics, among other energy conversion, recovery, and storage technological applications. In this work, we present a detailed study on the synthesis, morphology, structural, and magnetic properties of Ni, Co, and Ni-Co alloy and multisegmented Ni/Co nanowires modulated in composition, which were grown by template-assisted electrodeposition employing nanoporous anodic aluminum oxide as patterned templates. X-ray diffraction, and scanning and high-resolution transmission electron microscopies allowed for the structural, morphological, and compositional investigations of a few micrometers long and approximately 40 nm in diameter of pure Ni and Co single elements, together with multisegmented Ni/Co and alloyed Ni-Co nanowires. The vibrating sample magnetometry technique enabled us to extract the main characteristic magnetic parameters for these samples, thereby evaluating their different anisotropic magnetic behaviors and discuss them based on their morphological and structural features. These novel functional magnetic nanomaterials can serve as potential candidates for multibit magnetic systems in ultra-high-density magnetic data storage applications.

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Information storage in permalloy modulated magnetic nanowires

Sáez

Díaz

Cisternas

et al. 2021

Sci Rep

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A long piece of magnetic material shaped as a central cylindrical wire (diameter $$d=50$$ d = 50 nm) with two wider coaxial cylindrical portions (diameter $$D=90$$ D = 90 nm and thickness $$t=100$$ t = 100 nm) defines a bimodulated nanowire. Micromagnetism is invoked to study the equilibrium energy of the system under the variations of the positions of the modulations along the wire. The system can be thought of as composed of five independent elements (3 segments and 2 modulations) leading to $$2^5=32$$ 2 5 = 32 possible different magnetic configurations, which will be later simplified to 4. We investigate the stability of the configurations depending on the positions of the modulations. The relative chirality of the modulations has negligible contributions to the energy and they have no effect on the stability of the stored configuration. However, the modulations are extremely important in pinning the domain walls that lead to consider each segment as independent from the rest. A phase diagram reporting the stability of the inscribed magnetic configurations is produced. The stability of the system was then tested under the action of external magnetic fields and it was found that more than 50 mT are necessary to alter the inscribed information. The main purpose of this paper is to find whether a prototype like this can be complemented to be used as a magnetic key or to store information in the form of firmware. Present results indicate that both possibilities are feasible.

show abstract

Enhanced magneto-optical effects in composite coaxial nanowires embedded with Ag nanoparticles

Cited by 3 publications

References 35 publications

Information storage in permalloy modulated magnetic nanowires

Information storage in permalloy modulated magnetic nanowires

Ni-Co Alloy and Multisegmented Ni/Co Nanowire Arrays Modulated in Composition: Structural Characterization and Magnetic Properties

Information storage in permalloy modulated magnetic nanowires

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