Strain Effects in Narrow-Bandwidth Manganites: The Case of Epitaxial<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>Eu</mml:mi></mml:mrow><mml:mrow><mml:mn>0.7</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi>Sr</mml:mi></mml:mrow><mml:mrow><mml:mn>0.3</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi>MnO</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>Thin Films

Moon, Eun Ju; Keavney, D. J.; May, Steven J.

doi:10.1103/physrevapplied.1.054006

Cited by 9 publications

(9 citation statements)

References 52 publications

(61 reference statements)

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“…5b to highlight the distinct transitions. The dM/dT amplitude from the n ¼ 11 SL (in black) exhibits two minimum points at B80 and B315 K, consistent with the T C of ESMO and LSMO films, respectively 37,38 , as supported by the PNR results. Similarly, the n ¼ 6 SL (in red) exhibits two minimum points at B105 and B240 K, indicating the transition temperatures of the ESMO and LSMO are shifted towards one another as the difference in octahedral rotations in the two constituent materials is reduced.…”

Section: Resultssupporting

confidence: 82%

Spatial control of functional properties via octahedral modulations in complex oxide superlattices

et al. 2014

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Control of atomic structure, namely the topology of the corner-connected metal-oxygen octahedra, has emerged as an important route to tune the functional properties at oxide interfaces. Here we investigate isovalent manganite superlattices (SLs), [(La(0.7)Sr(0.3)MnO(3))n/(Eu(0.7)Sr(0.3)MnO(3))n] × m, as a route to spatial control over electronic bandwidth and ferromagnetism through the creation of octahedral superstructures. Electron energy loss spectroscopy confirms a uniform Mn valence state throughout the SLs. In contrast, the presence of modulations of the MnO(6) octahedral rotations along the growth direction commensurate with the SL period is revealed by scanning transmission electron microscopy and X-ray diffraction. We show that the Curie temperatures of the constituent materials can be systematically engineered via the octahedral superstructures leading to a modulated magnetization in samples where the SL period is larger than the interfacial octahedral coupling length scale, whereas a single magnetic transition is observed in the short-period SLs.

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Section: Resultssupporting

confidence: 82%

Spatial control of functional properties via octahedral modulations in complex oxide superlattices

et al. 2014

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“…The thickness of each La 0.7 Sr 0.3 MnO 3 (LSMO) and Eu 0.7 Sr 0.3 MnO 3 (ESMO) layer is 6 unit cells (uc), and the LSMO/ESMO bilayer is repeated 8 times (total thickness of the superlattice is 96 uc). During deposition, the temperature of the substrate was kept at ∼600 °C and an ozone/oxygen mixture (approximately 5/95%) was used as the oxidizing agent at a chamber pressure of ∼8.5 × 10 –6 Torr. , …”

Section: Methodsmentioning

confidence: 99%

Towards 3D Mapping of BO₆ Octahedron Rotations at Perovskite Heterointerfaces, Unit Cell by Unit Cell

He¹,

Ishikawa

Lupini³

et al. 2015

ACS Nano

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The rich functionalities in the ABO3 perovskite oxides originate, at least in part, from the ability of the corner-connected BO6 octahedral network to host a large variety of cations through distortions and rotations. Characterizing these rotations, which have significant impact on both fundamental aspects of materials behavior and possible applications, remains a major challenge at heterointerfaces. In this work, we have developed a unique method to investigate BO6 rotation patterns in complex oxides ABO3 with unit cell resolution at heterointerfaces, where novel properties often emerge. Our method involves column shape analysis in ABF-STEM images of the ABO3 heterointerfaces taken in specific orientations. The rotating phase of BO6 octahedra can be identified for all three spatial dimensions without the need of case-by-case simulation. In several common rotation systems, quantitative measurements of all three rotation angles are now possible. Using this method, we examined interfaces between perovskites with distinct tilt systems as well as interfaces between tilted and untilted perovskites, identifying an unusual coupling behavior at the CaTiO3/LSAT interface. We believe this method will significantly improve our knowledge of complex oxide heterointerfaces.

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“…Although many papers report the magnetic and electronic properties of R 1-x A x MnO 3 18–20 , they mostly report on bulks and much less often on films 21–24 . For future applications of manganite films, a detailed characterization of the film properties is required.…”

Section: Introductionmentioning

confidence: 99%

“…For future applications of manganite films, a detailed characterization of the film properties is required. Particularly for the narrow bandwidth manganites with R = Pr, Sm and Nd, the competing magnetic and electronic states often reside in close energetic proximity, and therefore their physical properties are sensitive to atomic replacement 24 . In thin film form, the interfacial strain could play an important role in addition to the atomic replacement.…”

Section: Introductionmentioning

confidence: 99%

Atomic replacement effects on the band structure of doped perovskite thin films

Cheng

Chuang

et al. 2019

Sci Rep

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The potential applications of perovskite manganite R 1-x A x MnO 3 (R = rare earth element; A = Sr, Ca) thin films have been continuously explored due to their multi-functional properties. In particular, the optimally hole-doped La 0.67 Ca 0.33 MnO 3 thin film demonstrates a colossal magneto-resistance that is beneficial to the performance of spintronic devices. To understand the effect of R and A ions on the material properties, we systematically measure the resistivity, magnetization, and electronic energy states for three optimally hole-doped R 0.67 A 0.33 MnO 3 thin films with R = La, Sm and A = Sr, Ca. Various energy parameters are derived based on the X-ray absorption and X-ray photoelectron spectra, including the band gap, the charge frustration energy and the magnetic exchange energy. It is interesting to find that the replacement of La with Sm is more effective than that of Sr with Ca in terms of tuning the electrical property, the Curie temperature, and the band gap. The strain-induced reduction of the O 2 p - Mn 3 d hybridization and the interplay of R/A site disorder and strain effect are discussed. The results of this study provide useful information for the band design of perovskite oxide films.

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Strain Effects in Narrow-Bandwidth Manganites: The Case of EpitaxialEu0.7Sr0.3MnO3Thin Films

Cited by 9 publications

References 52 publications

Spatial control of functional properties via octahedral modulations in complex oxide superlattices

Spatial control of functional properties via octahedral modulations in complex oxide superlattices

Towards 3D Mapping of BO₆ Octahedron Rotations at Perovskite Heterointerfaces, Unit Cell by Unit Cell

Atomic replacement effects on the band structure of doped perovskite thin films

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Strain Effects in Narrow-Bandwidth Manganites: The Case of EpitaxialEu0.7Sr0.3MnO3Thin Films

Cited by 9 publications

References 52 publications

Spatial control of functional properties via octahedral modulations in complex oxide superlattices

Spatial control of functional properties via octahedral modulations in complex oxide superlattices

Towards 3D Mapping of BO6 Octahedron Rotations at Perovskite Heterointerfaces, Unit Cell by Unit Cell

Atomic replacement effects on the band structure of doped perovskite thin films

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Towards 3D Mapping of BO₆ Octahedron Rotations at Perovskite Heterointerfaces, Unit Cell by Unit Cell