Strain-mediated electric-field control of exchange bias in a Co90Fe10/BiFeO3/SrRuO3/PMN-PT heterostructure

Wu, Sen; Miao, Jun; Xu, Xiaoguang; Wu, Yan; Reeve, Robert M.; Zhang, X. H.; Jiang, Yong

doi:10.1038/srep08905

Cited by 48 publications

(27 citation statements)

References 38 publications

(41 reference statements)

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“…Compared with the magnetic oxide, magnetic metal system attracts more attentions due to its high T C , flexibility, and easy production. The FE control of magnetic metal was observed in many systems like Fe/BTO, [47] Co/PMN-PT, [48,49] Ni/BTO, [50] CoFe/PMN-PT, [51] CoPd/PZT, [52] Fe-Ga/BTO, [53] CoFeB/PMN-PT. [54,55] The magnetic anisotropy, coercivity, magnetic moment, and magnetic switching were controlled by electric field in these systems.…”

Section: (Anti-)ferromagnetic Metalsmentioning

confidence: 99%

“…BTO, PMN-PT, and PZT). [17,18,[39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58] The external electric field alters the lattice or shape of the ferroelectric crystal by the converse piezoelectric effect, and then transfers the strain to the proximate magnetic layer, leading to the changes in magnetic anisotropy, magnetization rotation, and coercivity through the magnetostriction. In the FM/FE heterostructures, both (anti-)ferromagnetic oxides and metals are controlled by electric field.…”

Section: Strain-mediated Electrical Control Of Magnetismmentioning

confidence: 99%

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Electrical control of magnetism in oxides

Song

Cui²,

Peng³

et al. 2016

Chinese Phys. B

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This review article aims at illustrating the recent progresses in the electrical control of magnetism in oxides with profound physics and enormous potential applications. In the first part, we provide a comprehensive summary of the electrical control of magnetism in the classic multiferroic heterostructures and clarify their various mechanisms lying behind. The second part focuses on the novel route of electric double layer gating for driving a significantly electronic phase transition in magnetic oxides by a small voltage. The electric field applied on the ordinary dielectric oxide in the third part is used to control the magnetic phenomenon originated from the charge transfer and orbital reconstruction at the interface between dissimilar correlated oxides. At last, we analyze the challenges in electrical control of magnetism in oxides, both on mechanism and practical application, which would inspire more in-depth researches and advance the development in this field.

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Section: (Anti-)ferromagnetic Metalsmentioning

confidence: 99%

Section: Strain-mediated Electrical Control Of Magnetismmentioning

confidence: 99%

Electrical control of magnetism in oxides

Song

Cui²,

Peng³

et al. 2016

Chinese Phys. B

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“…Among these compounds, perovskite SrRuO 3 -a moderately correlated conductive ferromagnet [6][7][8] -has attained continuous interests. On the application side, it is widely utilized as conductive electrodes due to the good stability and structurally compatibility with other correlated oxides 7 ; meanwhile, it is explored to be a key integrant in fabricating oxide heterostructures/superlattices [9][10][11][12][13][14][15][16][17] , which may contribute to new functionalities in electronics and spintronics 7 . From the viewpoint of fundamental studies, SrRuO 3 is a simple but profound model system to explore how many-body interactions determine the physical properties [18][19][20][21][22] , and the underlying mechanism may provide a hint on novel physics of other correlated oxides including the unconventional superconductivity in Sr 2 RuO 4 23 and quantum criticality in Sr 3 Ru 2 O 7 24 .…”

mentioning

confidence: 99%

Origin of the kink in the band dispersion of the ferromagnetic perovskiteSrRuO3: Electron-phonon coupling

et al. 2016

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Perovskite SrRuO 3 , a prototypical conductive ferromagnetic oxide, exhibits a kink in its band dispersion signalling the unusual electron dynamics therein. However, the origin of this kink remains elusive. By taking advantage of the combo of reactive molecular beam epitaxy and in situ angle-resolved photoemission spectroscopy, we systematically studied the evolution of the low-energy electronic structure of SrRuO 3 films with thickness thinning down to nearly two-dimensional limit in a well-controlled way. The kink structure persists even in the 4-unit-cell-thick film. Moreover, through quantitative self-energy analysis, we observed the negligible thickness dependence of the binding energy of the kink, which is in sharp contrast to the downward trend of the Curie temperature with reducing the film thickness. Together with previously reported transport and Raman studies, this finding suggests that the kink of perovskite SrRuO 3 should originate from the electron-phonon coupling rather than magnetic collective modes, and the in-plane phonons may play a dominant role. Considering such a kink structure of SrRuO 3 is similar to these of many other correlated oxides, we suggest the possible ubiquity of the coupling of electrons to oxygen-related phonons in correlated oxides. PACS numbers: 74.25.Jb, In correlated oxides, the delicate interplay of charge, spin, lattice and orbital manifested by various collective excitations, gives rise to a wealth of fascinating quantum phenomena, such as metal-insulator transition 1 , high-T c superconductivity 2,3 , colossal magnetoresistance 4 , and multiferroics 5 . Among these compounds, perovskite SrRuO 3 -a moderately correlated conductive ferromagnet 6-8 -has attained continuous interests. On the application side, it is widely utilized as conductive electrodes due to the good stability and structurally compatibility with other correlated oxides 7 ; meanwhile, it is explored to be a key integrant in fabricating oxide heterostructures/superlattices 9-17 , which may contribute to new functionalities in electronics and spintronics 7 . From the viewpoint of fundamental studies, SrRuO 3 is a simple but profound model system to explore how many-body interactions determine the physical properties [18][19][20][21][22] , and the underlying mechanism may provide a hint on novel physics of other correlated oxides including the unconventional superconductivity in Sr 2 RuO 4 23 and quantum criticality in Sr 3 Ru 2 O 7 24 .For correlated oxides, a kink in the low-energy band dispersion reflects the unusual electron dynamics -the scattering rate of electrons has been altered within a narrow energy range -which usually implies the existence of pronounced coupling between electrons and various collective excitations 3,25-29 . Thus, the interpretation of the kink is of significance to understand the essential effects on physical properties of correlated systems. For example, there have been lasting and intense debates on whether the kink-like feature discovered in the dispersion of cuprate super...

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“…[14][15][16] For practical purpose, BFO films are often deposited on electrical conducting substrates (such as Nd doped SrTiO 3 ) 17 or conductive bottom layer (such as SrRuO 3 and Pt). 18,19 In the present work we proposed titanium nitride (TiN) as an alternative conductive layer and examined BFO structure growth on the top of TiN layer on MgO substrates. TiN and MgO share the same structure and similar lattice parameter (a TiN ∼ 4.240 Å; a MgO ∼ 4.216 Å).…”

Section: Introductionmentioning

confidence: 99%

Epitaxial growth of BiFeO3 films on TiN under layers by sputtering deposition

Wang

et al. 2017

AIP Advances

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BiFeO3/TiN/MgO (001) films have been prepared by magneton sputtering, where TiN serves as a conductive under layer. X-ray diffraction profiles and cross-sectional transmission electron microscopy images reveal that not only (001)-epitaxial BiFeO3 films are obtained, but also both tetragonal and rhombohedral phases co-exist in BiFeO3 films. Their crystallographic relationship is shown as following: tetragonal-BiFeO3 (001) [100]//TiN (001) [100]//MgO (001) [100] and rhombohedral-BiFeO3 (001) [100]//TiN (001) [100]//MgO (001) [100]. Besides, an oxidized TiN layer (∼ 20 nm) has also been detected between BiFeO3 and TiN layers and its formation may originate from oxygen inter-diffusion from BiFeO3 layer. Despite of the existence of the oxidized TiN layer, it does not affect the epitaxial growth of BiFeO3 films. On the other hand, the coercivity electric field obtained in ferroelectric loop of BiFeO3 is greatly enhanced to 49 MV/cm due to the existence of oxidized TiN layer.

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Strain-mediated electric-field control of exchange bias in a Co90Fe10/BiFeO3/SrRuO3/PMN-PT heterostructure

Cited by 48 publications

References 38 publications

Electrical control of magnetism in oxides

Electrical control of magnetism in oxides

Origin of the kink in the band dispersion of the ferromagnetic perovskiteSrRuO3: Electron-phonon coupling

Epitaxial growth of BiFeO3 films on TiN under layers by sputtering deposition

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