Mn<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>3</mml:mn><mml:mi>s</mml:mi></mml:math>exchange splitting in mixed-valence manganites

Galakhov, V. R.; Demeter, M.; Bartkowski, S.; Neumann, M.; Ovechkina, N. A.; Kurmaev, E.Z.; Lobachevskaya, N. I.; Mukovskiǐ, Ya. M.; Mitchell, J. F.; Ederer, D. L.

doi:10.1103/physrevb.65.113102

Cited by 521 publications

(294 citation statements)

References 17 publications

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“…A few XPS reports are also available in the literature on PZT/LSMO heterostructures; however, a thick layer of PZT restricts the investigation of chemical and valence states of layers close to interface. 17,18 Preziosi et al 10 have carefully demonstrated the transport properties of LSMO (5 nm) under two different polar states of PZT, which revealed that ferroelectric polarization significantly changes the interfacial magnetic anisotropy and affects the spin-orbit coupling. Leufke et al 11 have shown significant modification of magnetization of LSMO (7.…”

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confidence: 99%

Ferroelectric capped magnetization in multiferroic PZT/LSMO tunnel junctions

Kumar

Barrionuevo

Ortega

et al. 2015

Applied Physics Letters

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Self-poled ultra-thin ferroelectric PbZr 0.52 Ti 0.48 O 3 (PZT) (5 and 7 nm) films have been grown by pulsed laser deposition technique on ferromagnetic La 0.67 Sr 0.33 MnO 3 (LSMO) (30 nm) to check the effect of polar capping on magnetization for ferroelectric tunnel junction (FTJ) devices.PZT/LSMO heterostructures with thick polar PZT (7 nm) capping show nearly 100% enhancement in magnetization compared with thin polar PZT (5 nm) films, probably due to excess hole transfer from the ferroelectric to the ferromagnetic layers. Core-level X-ray photoelectron spectroscopy studies revealed the presence of larger Mn 3s exchange splitting and higher Mn 3+ /Mn 4+ ion ratio in the LMSO with 7 nm polar capping.

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confidence: 99%

Ferroelectric capped magnetization in multiferroic PZT/LSMO tunnel junctions

Kumar

Barrionuevo

Ortega

et al. 2015

Applied Physics Letters

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“…Figure 3 shows bulk-sensitive HAXPES measurements of the Mn 3s multiplet-split spectra for the Pt-capped coherently-strained CaMnO3 films. In 3d transition metals, the 3s core-level splitting arises due to the exchange coupling interaction between the 3s core-hole and 3d electrons and due to the intrashell 3d charge transfer process 37,38 . As the valence state of the Mn ion tends to decrease, the energy splitting between the two Mn 3s multiplet components increases 38,39 .…”

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confidence: 99%

Strain-Engineered Oxygen Vacancies in CaMnO₃ Thin Films

et al. 2017

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We demonstrate a novel pathway to control and stabilize oxygen vacancies in complex transition-metal oxide thin films. Using atomic layer-by-layer pulsed laser deposition (PLD) from two separate targets, we synthesize high-quality singlecrystalline CaMnO 3 films with systematically varying oxygen vacancy defect formation energies as controlled by coherent tensile strain. The systematic increase of the oxygen vacancy content in CaMnO 3 as a function of applied in-plane strain is observed and confirmed experimentally using high-resolution soft X-ray absorption spectroscopy (XAS) in conjunction with bulk-sensitive hard X-ray photoemission spectroscopy (HAXPES). The relevant defect states in the densities of states are identified and the vacancy content in the films quantified using the combination of first-principles theory and core−hole multiplet calculations with holistic fitting. Our findings open up a promising avenue for designing and controlling new ionically active properties and functionalities of complex transition-metal oxides via strain-induced oxygen-vacancy formation and ordering.

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“…The surface atom ratio of Ce 3+ to Ce 4+ was 1.13, where Ce 3+ = (u + u 0 + v + v 0 ) and Ce 4+ = (u + u + u + v + v + v) [24]. The surface average oxidation state (AOS) of Mn was estimated based on the formula: AOS = 8.956-1.126( E) [25], where E is the Mn 3s multiplet splitting values (Fig. 5C).…”

Section: Characterization Of Catalystsmentioning

confidence: 99%