Charge control of antiferromagnetism at PbZr0.52Ti0.48O3/La0.67Sr0.33MnO3 interface

Ma, Xiaoxuan; Kumar, Ashok; Dussan, S.; Zhai, Haowei; Fang, F.; Zhao, Haibin; Scott, J. F.; Katiyar, Ram S.; Lüpke, G.

doi:10.1063/1.4870507

Cited by 28 publications

(30 citation statements)

References 39 publications

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“…However, in the present study, we describe the overall behaviour of the system, focusing on the major factors controlling this behaviour, and we have not attempted to isolate every mechanism at work. Collectively, these results suggest a magnetic phase transition at the LSMO/PZT interface, in agreement with other studies 14,63,64 . We find that the local ferroelectric polarization differs at each interface, which affects the magnitude of the charge-transfer screening effect in each LSMO layer.…”

Section: Discussionsupporting

confidence: 82%

Polarization screening-induced magnetic phase gradients at complex oxide interfaces

et al. 2015

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Thin-film oxide heterostructures show great potential for use in spintronic memories, where electronic charge and spin are coupled to transport information. Here we use a La 0.7 Sr 0.3 MnO 3 (LSMO)/PbZr 0.2 Ti 0.8 O 3 (PZT) model system to explore how local variations in electronic and magnetic phases mediate this coupling. We present direct, local measurements of valence, ferroelectric polarization and magnetization, from which we map the phases at the LSMO/PZT interface. We combine these experimental results with electronic structure calculations to elucidate the microscopic interactions governing the interfacial response of this system. We observe a magnetic asymmetry at the LSMO/PZT interface that depends on the local PZT polarization and gives rise to gradients in local magnetic moments; this is associated with a metal-insulator transition at the interface, which results in significantly different charge-transfer screening lengths. This study establishes a framework to understand the fundamental asymmetries of magnetoelectric coupling in oxide heterostructures.

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Section: Discussionsupporting

confidence: 82%

Polarization screening-induced magnetic phase gradients at complex oxide interfaces

et al. 2015

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“…22,23 We have recently demonstrated the TER with large resistance ratios (up to 100:1) in heterostructures which mainly depends on the active device area. 24 The effect of magnetic fields on TER was also observed and was much greater with applied in-plane magnetic field.…”

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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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“…1,2 In previous studies, ferroelectric field effect has been successfully utilized to modulate the electronic and magnetic properties of high-T c superconductors, [3][4][5] colossal magnetoresistive oxides, [6][7][8][9][10][11][12][13][14] and various Mott insulators. [15][16][17] This device concept also provides a viable route for building high density, low power, complex oxide-based logic and memory applications.…”

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confidence: 99%

Effect of strain on ferroelectric field effect in strongly correlated oxide Sm0.5Nd0.5NiO3

Zhang

Chen

Gardner

et al. 2015

Applied Physics Letters

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Charge control of antiferromagnetism at PbZr0.52Ti0.48O3/La0.67Sr0.33MnO3 interface

Abstract: Enhanced magnetoelectric effect in La0.67Sr0.33MnO3/PbZr0.52Ti0.48O3 multiferroic nanocomposite films with a SrRuO3 buffer layer

Cited by 28 publications

References 39 publications

Polarization screening-induced magnetic phase gradients at complex oxide interfaces

Polarization screening-induced magnetic phase gradients at complex oxide interfaces

Ferroelectric capped magnetization in multiferroic PZT/LSMO tunnel junctions

Effect of strain on ferroelectric field effect in strongly correlated oxide Sm0.5Nd0.5NiO3

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