Interfacial magnetic coupling in ultrathin all-manganite La0.7Sr0.3MnO3-TbMnO3 superlattices

Tian, Yuan; Lebedev, Oleg I.; Roddatis, Vladimir; Lin, Wenzhi; Ding, Junfeng; Hu, Shihao; Shen, Yan; Wu, Tom

doi:10.1063/1.4871701

Cited by 28 publications

(18 citation statements)

References 47 publications

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“…The EB appears below 70 K and increases as the temperature is lowered. This H E behavior with the temperature is expected and observed in other systems [21,24]. The temperature dependence of H C deviates from H E surprisingly, around the temperature where the EB field vanishes: above 60 K the coercivity increases strongly and decreases again above 80 K.…”

Section: Resultssupporting

confidence: 51%

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Exchange bias effect in polycrystalline NiO/NiMn2O4 composite

Cabral

Serna

Salles

et al. 2015

Journal of Alloys and Compounds

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Section: Resultssupporting

confidence: 51%

“…In these, the EB effect emerges near the T N of the AFM as reported in FM/ AFM layers [21], AFM/FIM core-shell nanoparticles [22], and AFM/FIM nanocomposites [23]. An interesting feature of our system is that the FIM transition occurs well below the AFM ordering temperature.…”

Section: Resultsmentioning

confidence: 67%

Exchange bias effect in polycrystalline NiO/NiMn2O4 composite

Cabral

Serna

Salles

et al. 2015

Journal of Alloys and Compounds

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“…and for La 0.7 Sr 0.3 MnO 3 /TbMnO 3 superlattices [20], albeit with a rather small Curie temperature in the latter system. Here we report results on single LBMO layers embedded in SrRuO 3 (SRO) layers.…”

mentioning

confidence: 84%

Magnetic and magnetotransport properties of ultrathin La${}_{0.7}$Ba${}_{0.3}$MnO₃epitaxial films embedded in SrRuO₃

et al. 2016

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The structural, magnetic and magnetotransport properties of La 0.7 Ba 0.3 MnO 3 layers interfaced with SrRuO 3 layers were studied. High quality trilayers with coherent interfaces were fabricated by pulsed laser deposition. The thickness of the embedded La 0.7 Ba 0.3 MnO 3 layer was varied between one and five unit cells, whereas the embedding SrRuO 3 layers were kept at a constant thickness of three unit cells. In this embedded geometry La 0.7 Ba 0.3 MnO 3 layers are ferromagnetic, even if only one unit cell thick. Magnetization and anomalous Hall effect curves show an antiferromagnetic coupling of the layers that leads to an intricate magnetic field dependence. When this is disentangled, it can be shown that the magnetic and transport properties are mainly dominated by the corresponding properties of the constituent materials.Extensive research effort was devoted to the study of thin ferromagnetic films grown on various substrates [1][2][3]. Although restricted to ferromagnetic films, this research field is very wide ranging from elemental metallic films and their spin structures [4] or their multiferroic properties [5] to oxide films and their complex interplay between spin, structure, orbital and electronic properties [6]. There is one underlying feature in these systems; thin films-unless these are free-standing-have an underlying asymmetry being adjacent to the substrate on one side and to vacuum (or often more realistically: to an unknown variety of adsorbates) on the other side. Depending on the properties of the substrate, this proximity might induce obvious changes of the film properties, e.g. exchange biasing of a ferromagnetic film in contact with an antiferromagnetic substrate [7]. The issue of magnetic proximity, however, might be far more subtle, extending to less obvious changes [8]. The situation might be similar to proximity effects in superconductors [9], albeit with the difference that the relevant interaction length scales are sensitive to coupling type and interface characteristics [10]. Apart from subtle proximity effects one has to consider the effect of strain and, for perovskite-like oxides, the effect of the oxygen octahedral tilt and rotation mismatch at interfaces between dissimilar materials.In this work we study the magnetic and magnetotransport properties of embedded La 0.7 Ba 0.3 MnO 3 (LBMO) films with thicknesses ranging from one to five unit cells (uc). In recent years a series of studies on exposed thin manganite films [11][12][13][14] showed that these films lost their ferromagnetism and metallicity below a critical thickness of about eight unit cells [14]. This was attributed to the strain exerted by the substrate (either SrTiO 3 or LaAlO 3 ) and the surface symmetry breaking: a tetragonal distortion of the unit cell would lead to an energetic splitting of the d z 2 andd x y 2 2orbitals, destabilizing the double exchange interaction, while stabilizing the superexchange interaction and thus tipping the balance between ferro-and antiferromagnetism [12,15,16]. We have shown bef...

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“…Similar metallic interfaces have also been reported in other combinations of insulators like LaTiO 3 /STO, LaVO 3 /STO, LaFeO 3 /Sm 2 CuO 4 , GdTiO 3 /STO, and Al 2 O 3 /STO . Such perovskite oxide thin films and heterostructures have been intensively investigated for novel physical properties and potential applications . On another forefront of materials research, 1D nanostructured materials like nanowires and nanorods (NRs) exhibit unique optical, electrical, and mechanical functionalities, and their dimensionality enables applications extending from probe microscopy tips to interconnections in nanoelectronics.…”

Section: Introductionmentioning

confidence: 54%

ZnO Nanorods on a LaAlO₃–SrTiO₃ Interface: Hybrid 1D–2D Diodes with Engineered Electronic Properties

Bera

Lin

Yao

et al. 2015

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Integrating nanomaterials with different dimensionalities and properties is a versatile approach toward realizing new functionalities in advanced devices. Here, a novel diode-type heterostructure is reported consisting of 1D semiconducting ZnO nanorods and 2D metallic LaAlO3-SrTiO3 interface. Tunable insulator-to-metal transitions, absent in the individual components, are observed as a result of the competing temperature-dependent conduction mechanisms. Detailed transport analysis reveals direct tunneling at low bias, Fowler-Nordheim tunneling at high forward bias, and Zener breakdown at high reverse bias. Our results highlight the rich electronic properties of such artificial diodes with hybrid dimensionalities, and the design principle may be generalized to other nanomaterials.

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Interfacial magnetic coupling in ultrathin all-manganite La0.7Sr0.3MnO3-TbMnO3 superlattices

Cited by 28 publications

References 47 publications

Exchange bias effect in polycrystalline NiO/NiMn2O4 composite

Exchange bias effect in polycrystalline NiO/NiMn2O4 composite

Magnetic and magnetotransport properties of ultrathin La${}_{0.7}$Ba${}_{0.3}$MnO₃epitaxial films embedded in SrRuO₃

ZnO Nanorods on a LaAlO₃–SrTiO₃ Interface: Hybrid 1D–2D Diodes with Engineered Electronic Properties

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Interfacial magnetic coupling in ultrathin all-manganite La0.7Sr0.3MnO3-TbMnO3 superlattices

Cited by 28 publications

References 47 publications

Exchange bias effect in polycrystalline NiO/NiMn2O4 composite

Exchange bias effect in polycrystalline NiO/NiMn2O4 composite

Magnetic and magnetotransport properties of ultrathin La${}_{0.7}$Ba${}_{0.3}$MnO3epitaxial films embedded in SrRuO3

ZnO Nanorods on a LaAlO3–SrTiO3 Interface: Hybrid 1D–2D Diodes with Engineered Electronic Properties

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Product

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Magnetic and magnetotransport properties of ultrathin La${}_{0.7}$Ba${}_{0.3}$MnO₃epitaxial films embedded in SrRuO₃

ZnO Nanorods on a LaAlO₃–SrTiO₃ Interface: Hybrid 1D–2D Diodes with Engineered Electronic Properties