Perpendicular Exchange-Biased Magnetotransport at the Vertical Heterointerfaces in La0.7Sr0.3MnO3:NiO Nanocomposites

Zhang, Wenrui; Li, Leigang; Lu, Ping; Fan, Meng; Su, Qing; Khatkhatay, Fauzia; Chen, Aiping; Jia, Q. X.; Zhang, Xinghang; MacManus‐Driscoll, Judith L.; Wang, Haiyan

doi:10.1021/acsami.5b06314

Cited by 40 publications

(43 citation statements)

References 30 publications

(38 reference statements)

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“…In a LSMO:NiO VAN system, the plan‐view HAADF STEM image shows that 3–5 nm NiO nanopillars are randomly embedded in the LSMO film matrix, as shown in Figure . Interestingly, ring‐shape white contrast is seen around the NiO nanopillars (Figure a).…”

Section: Strain Defect and Microstructure Correlationmentioning

confidence: 91%

“…The spin‐polarized tunneling across the ferromagnetic/insulating/ferromagnetic structure could be responsible for the enhanced LFMR close to the percolation threshold. When the secondary phase is below the percolation threshold, the MR in VANs can be tuned via the domain size, microstructure, defects, interface diffusion and interface exchange coupling …”

Section: Functionality Tuning Driven By Strain Defect and Interfacementioning

confidence: 99%

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Metal Oxide Nanocomposites: A Perspective from Strain, Defect, and Interface

et al. 2018

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Complex metal oxides, which show a variety of functional properties such as ferromagnetism, ferroelectricity, multi-ferroelectricity, superconductivity, and ionic conduction, have attracted much attention in the past decades. These exotic physical properties arise from a complex hierarchy of competing interactions among spin, charge, orbital, and lattice degrees of freedom. The development of advanced characterization techniques such as electron microscopy, neutron scattering, synchrotron scattering and imaging, spectroscopy at high magnetic fields, and others has enabled us to study the interactions among these degrees of freedom coupled with strain, defect, and interface Vertically aligned nanocomposite thin films with ordered two phases, grown epitaxially on substrates, have attracted tremendous interest in the past decade. These unique nanostructured composite thin films with large vertical interfacial area, controllable vertical lattice strain, and defects provide an intriguing playground, allowing for the manipulation of a variety of functional properties of the materials via the interplay among strain, defect, and interface. This field has evolved from basic growth and characterization to functionality tuning as well as potential applications in energy conversion and information technology. Here, the remarkable progress achieved in vertically aligned nanocomposite thin films from a perspective of tuning functionalities through control of strain, defect, and interface is summarized. Thin FilmsThe ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.201803241. 12 11 12where c 11 and c 12 are elastic moduli of the film material. Epitaxial strain gradually changes with film thickness in perovskite manganites. Figure 3 shows reciprocal space mapping or RSM (103) of La 0.7 Ca 0.3 MnO 3 (LCMO) films on STO (001) substrates. It captures the gradual strain relaxation process with increasing film thickness in manganite thin films. When the film is very thin, the interface is coherent with

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Section: Strain Defect and Microstructure Correlationmentioning

confidence: 91%

Section: Functionality Tuning Driven By Strain Defect and Interfacementioning

confidence: 99%

Metal Oxide Nanocomposites: A Perspective from Strain, Defect, and Interface

et al. 2018

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“…For example, a pronounced LFMR value of 21% at 20 K and 1 T in (LSMO) 0.5 :(CeO 2 ) 0.5 nanocomposite films [14] and a LFMR value of 12% at 77 K and 1 T in (LSMO) 0.5 :(ZnO) 0.5 nanocomposite films [15] were obtained. Furthermore, improving the MR properties by tuning the second phase ratio in the La 0.7 Ca 0.3 MnO 3 :NiO [3] and LSMO:NiO [16] nanocomposite films were studied in our previous work, and the magnetotransport properties of LSMO:NiO nanocomposite films have also been investigated by Chen et al [17]. These results demonstrate that the T MI decrease rapidly to low temperatures for the nanocomposite films with excess second phase ratio (usually > 50%), which leads to the MR effect occurring only at low temperatures ( < 200 K).…”

Section: Introductionmentioning

confidence: 99%

“…Interestingly, it is worth noting that the enhanced socalled LFMR properties have been observed near T C in several epitaxial nanocomposite thin films [16][17][18][19]. Although the MR properties were obtained under low magnetic fields ( ≤ 1 T), it might not be appropriate to take them as the conventional LFMR effect.…”

Section: Introductionmentioning

confidence: 99%

“…Although the MR properties were obtained under low magnetic fields ( ≤ 1 T), it might not be appropriate to take them as the conventional LFMR effect. Because the temperature window of MR effect is closely related to the metal-insulator (M-I) transition temperature (T MI ) and the enhanced MR properties can be explained by the mechanism of enhanced spin-fluctuation depression, which is similar to that of CMR effect [16][17][18][19][20]. Therefore, it is possible to adjust the MR following T C at low magnetic fields to room temperature if the T C can be tuned effectively.…”

Section: Introductionmentioning

confidence: 99%

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Room temperature magnetoresistance properties in self-assembled epitaxial La_0.7Sr_0.3MnO₃:NiO nanocomposite thin films

Wang

Ning

et al. 2018

Materials Research Letters

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Self-assembled epitaxial La 0.7 Sr 0.3 MnO 3 :NiO (LSMO:NiO) nanocomposite thin films were grown on (001)-oriented SrTiO 3 substrates by pulsed laser deposition, and their microstructures and magnetoresistance (MR) properties were investigated. The room temperature MR effect at a low magnetic field has been realized in the composite films, and the maximum MR value is 18.7% at 300 K and 1 T. The room temperature MR properties at the low magnetic field can be attributed to the special structure, which is made up of the nano-sized LSMO and NiO columns. The room temperature MR properties at low magnetic fields will facilitate its extensive room temperature applications. IMPACT STATEMENT The room temperature magnetoresistance properties at a low magnetic field has been realized in the self-assembled epitaxial La 0.7 Sr 0.3 MnO 3 :NiO nanocomposite thin films by controlling the microstructures.

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Self‐Assembled Metal–Dielectric Hybrid Metamaterials in Vertically Aligned Nanocomposite Form with Tailorable Optical Properties and Coupled Multifunctionalities

Zhang

Wang

2021

Advanced Photonics Research

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Metal–dielectric hybrid metamaterials have attracted increasing research interest in recent years because of their novel optical properties and promising applications in the fields of electronic and photonic devices. Dielectric permittivity is a key parameter that strongly influences the optical properties of materials. By self‐assembling the metallic and dielectric components in a pillar‐in‐matrix structure, a strong anisotropic structure forms and results in opposite signs of permittivity components (i.e., ε|| > 0 and ε⊥ < 0, or vice versa) and exotic optical responses including hyperbolic dispersion in the visible to near‐infrared region. Herein, the main approaches of tuning the permittivity in self‐assembled metal–dielectric vertically aligned nanocomposite (VAN) thin films are reviewed, including tuning the metal pillar density and geometry, film strain state and background pressure during growth, and seeking other metal‐free and complex structure designs. Future research directions are also proposed, including unique approaches to improve their thermal stability, integrate on flexible substrates toward wearable device fabrication, and explore real‐time tunable metamaterials.

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Perpendicular Exchange-Biased Magnetotransport at the Vertical Heterointerfaces in La_0.7Sr_0.3MnO₃:NiO Nanocomposites

Cited by 40 publications

References 30 publications

Metal Oxide Nanocomposites: A Perspective from Strain, Defect, and Interface

Metal Oxide Nanocomposites: A Perspective from Strain, Defect, and Interface

Room temperature magnetoresistance properties in self-assembled epitaxial La_0.7Sr_0.3MnO₃:NiO nanocomposite thin films

Self‐Assembled Metal–Dielectric Hybrid Metamaterials in Vertically Aligned Nanocomposite Form with Tailorable Optical Properties and Coupled Multifunctionalities

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Perpendicular Exchange-Biased Magnetotransport at the Vertical Heterointerfaces in La0.7Sr0.3MnO3:NiO Nanocomposites

Cited by 40 publications

References 30 publications

Metal Oxide Nanocomposites: A Perspective from Strain, Defect, and Interface

Metal Oxide Nanocomposites: A Perspective from Strain, Defect, and Interface

Room temperature magnetoresistance properties in self-assembled epitaxial La0.7Sr0.3MnO3:NiO nanocomposite thin films

Self‐Assembled Metal–Dielectric Hybrid Metamaterials in Vertically Aligned Nanocomposite Form with Tailorable Optical Properties and Coupled Multifunctionalities

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Product

Resources

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Perpendicular Exchange-Biased Magnetotransport at the Vertical Heterointerfaces in La_0.7Sr_0.3MnO₃:NiO Nanocomposites

Room temperature magnetoresistance properties in self-assembled epitaxial La_0.7Sr_0.3MnO₃:NiO nanocomposite thin films