Substrate-Induced Strain Effect on Structural and Magnetic Properties of La0.5Sr0.5CoO3 Films

Sánchez-Pérez, Miriam; Andrés, J. P.; González, Javier; Antón, Ricardo López; Torre, M. A. López de la; Durá, O. J.

doi:10.3390/nano11030781

Cited by 6 publications

(3 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…SrCoO 2.5 F 0.5 on the STO substrate with tensile strain ( a / c = 1.020) also exhibited ferromagnetism and metallic conductivity, but its T C is lower (∼90 K) than the nearly unstrained SrCoO 2.5 F 0.5 /LSAT ( a / c = 1.005), M S is smaller (1.5 μ B /Co), and the resistivity is 1 order of magnitude higher compared to SrCoO 2.5 F 0.5 on the LSAT substrate. The strain effect may alter Co–O/Co–F bond lengths or cause octahedral distortion, influencing physical properties, as observed in La 0.5 Sr 0.5 CoO 3 thin films. ,− Reflecting the metallic character, the thermopower ( S ) at room temperature (RT) for SrCoO 2.5 F 0.5 /STO of +8 μV K –1 (Figure b) is reduced from +254 μV K –1 in semiconducting SrCoO 2.5 /STO films and is close to those of metallic SrCoO 3−δ films ( S = +9.6 μV K –1 for SrCoO 3−δ /STO) …”

Section: Resultsmentioning

confidence: 67%

Pure Fluorine Intercalation into Brownmillerite Oxide Thin Films by Using Ionic Liquid Gating

Namba,

Takatsu,

et al. 2024

Chem. Mater.

View full text Add to dashboard Cite

Electrolyte gating, exemplified by ionic liquid gating (ILG), has emerged as a promising technique for modifying the physical properties of transition-metal oxides through cation intercalations, such as H + and Li + . However, the anion insertion by the ILG remains largely unexplored, except for O 2− . In this study, we have developed an ILG-based F − insertion method to allow oxidative fluorine insertion without a loss of oxide ions. Employing a solution of tetramethylammonium fluoride tetrahydrate in 1-methyl-1propylpyrrolidinium bis-trifluorosulfonyl-imide as an electrolyte, fluoride ions were electrochemically inserted into brownmillerite SrCoO 2.5 films, resulting in the formation of a SrCoO 2.5 F 0.5 perovskite with the Co 3.5+ state. Similar to its oxide counterpart La 0.5 Sr 0.5 Co 3.5+ O 3 , the obtained SrCoO 2.5 F 0.5 is a ferromagnetic metal with a Currie temperature (T C ) of ∼110 K. Notably, this behavior was not observed in any SrCoO 3−x F y compounds prepared using conventional reactions. Additionally, this technique was applied to SrFeO 2.5 brownmillerite, leading to SeFeO 2.5 F 0.5 perovskite, which suppresses a charge disproportionation as found in the oxide counterpart La 1−x Sr x FeO 3 . The ILGbased fluorination reaction developed in this study opens new avenues for the exploration of functional oxyfluorides from oxygendeficient oxide hosts.

show abstract

Section: Resultsmentioning

confidence: 67%

Pure Fluorine Intercalation into Brownmillerite Oxide Thin Films by Using Ionic Liquid Gating

Namba,

Takatsu,

et al. 2024

Chem. Mater.

View full text Add to dashboard Cite

show abstract

“…Magnetic nanomaterials received much attention from both basic and applied points due to interesting physical phenomena caused by the size effect [1,2]. In particular, soft magnetic materials are promising for spintronic applications including information storage, logic devices, and high-frequency electronics [3][4][5]. Various magnetic textures (e.g.…”

Section: Introductionmentioning

confidence: 99%

Spontaneous nucleation of vortex–antivortex pairs in confined magnetic microstructures

Shen,

Bo,

Zhao

et al. 2023

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Vortex–antivortex pairs have shown great potential in spintronics, where they can be used for information storage and logical devices. However, the physical mechanism for the nucleation of vortex–antivortex pairs is still unclear due to its metastability. We report on spontaneous nucleation of vortex–antivortex pairs in patterned Fe20Ni80 films (circular, square, hexagonal islands). By using a complex approach involving micromagnetic simulations, more in-depth understanding of vortex pair nucleation was achieved. A large amount of vortex–antivortex pairs appear in the as-grown magnetic film, which is the unstable high-energy state. Then, vortex and antivortex moves towards each other and annihilate, transforming magnetic structures and lowering the total energy of the system. With the decrease of sizes of microstructures, isolated vortex becomes stabilized due to confinement effect. These results provide a physical view for the nucleation of vortex–antivortex pairs and may be useful for design and optimization of magnetic microstructures for future spintronic applications.

show abstract

“…The crystalline orientations of LSC and TMD/LSC were further investigated by X-ray diffraction (XRD) analysis (Figure f and Figure S5). The diffraction pattern of LSC exhibited a pure cubic-phase perovskite structure in the Pm 3̅ m space group . LSC grown on TMDs (MoS 2 , ReS 2 , and MoReS 2 ) showed additional diffraction peaks related to impurity oxides (e.g., La 3 ReO 8 or SrMoO 4 ).…”

mentioning

confidence: 99%

Crystal Facet and Electronic Structure Modulation of Perovskite Oxides for Water Oxidation

et al. 2023

View full text Add to dashboard Cite

In water-splitting catalysts, exposing high-activity crystal facets with optimal electronic structures can significantly enhance the oxygen evolution reaction (OER) kinetics. In this work, we demonstrate a facile strategy for simultaneously modulating the preferential crystal facet and electronic structure of perovskite oxides for their use as water-electrolysis catalysts using a template-mediated growth approach. Experimental and computational analyses revealed that the preferred crystal facet of La0.5Sr0.5CoO3 (LSC) grown on MoReS2 was effectively modulated to the (110) plane, and the free energy barrier of the rate-determining step was lowered by such crystal facet engineering. Furthermore, the interfacial charge transfer between LSC and MoReS2 enabled the optimal electronic structure of the B-site cation in LSC. Consequently, LSC grown on MoReS2 exhibited an OER activity of 210 mV at 10 mA cm–2, surpassing the performance of state-of-the-art perovskite oxide-based catalysts. Our findings provide new insights into the design of efficient perovskite oxide-based electrocatalysts for water electrolysis.

show abstract

Substrate-Induced Strain Effect on Structural and Magnetic Properties of La0.5Sr0.5CoO3 Films

Cited by 6 publications

References 54 publications

Pure Fluorine Intercalation into Brownmillerite Oxide Thin Films by Using Ionic Liquid Gating

Pure Fluorine Intercalation into Brownmillerite Oxide Thin Films by Using Ionic Liquid Gating

Spontaneous nucleation of vortex–antivortex pairs in confined magnetic microstructures

Crystal Facet and Electronic Structure Modulation of Perovskite Oxides for Water Oxidation

Contact Info

Product

Resources

About