Rashba spin-orbit coupling induced modulation of magnetic anisotropy in canted antiferromagnetic heterostructures

Vagadia, Megha; Sahoo, Jayaprakash; Kumar, Ankit; Sardar, Suman; Tank, Tejas M.; Rana, D. S.

doi:10.1103/physrevb.107.064420

Cited by 6 publications

(4 citation statements)

References 52 publications

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“…This value is much larger than that of La 2/3 Sr 1/3 MnO 3 and La 1‐x Ca x MnO 3 (0.003∼1 Ω −1 cm −1 ), [ 34,37,38 ] SrIrO 3 and CaIrO 3 with a canted antiferromagnetic order induced by interface engineering (∼3 Ω −1 cm −1 and 0.02 Ω −1 cm −1 ). [ 24,28 ]…”

Section: Resultsmentioning

confidence: 99%

“…This value is much larger than that of La 2/3 Sr 1/3 MnO 3 and La 1-x Ca x MnO 3 (0.003∼1 Ω −1 cm −1 ), [34,37,38] SrIrO 3 and CaIrO 3 with a canted antiferromagnetic order induced by interface engineering (∼3 Ω −1 cm −1 and 0.02 Ω −1 cm −1 ). [24,28] A deep understanding of the large 𝜎 AHE xy of the FM CRO layers can be got from DFT calculations. Details of the calculations are explained in Note 1 of the supporting information.…”

Section: Emergent Ferromagnetism In Cro Induced By Proximity Effectmentioning

confidence: 99%

“…This is in sharp contrast to the proximity-induced canted antiferromagnetic state in heavy transition oxides such as SrIrO 3 and CaIrO 3 (∼0.1 μ B /Ir). [19][20][21][22][23][24][25][26][27][28][29][30] Moreover, the magnetic moments of Mn and Ru align along the same direction, implying a ferromagnetic coupling between them. Based on these results, we conclude with confidence that interface ferromagnetism is realized in PM CRO via interface engineering.…”

Section: Spacially-resoveled Magnetic Characterization and Theoretica...mentioning

confidence: 99%

“…Due to Dzyaloshinskii-Moriya interaction, unfortunately, a canted antiferromagnetic rather than a collinear FM order establishes in the SrIrO 3 layer of the La 0.67 Sr 0.33 MnO 3 /SrIrO 3 , [19][20][21][22] LaMnO 3 /SrIrO 3 , [23] LaCoO 3 /SrIrO 3 , [24] and SrMnO 3 /SrIrO 3 [25][26] heterostructures, with a net magnetic moment of only ∼0.1 μ B /Ir. CaIrO 3based heterostructures such as CaMnO 3 /CaIrO 3 [27][28][29] and SrTiO 3 /CaIrO 3 [30] were also investigated, and it is unsuccessful either to induce a collinear FM order in the CaIrO 3 layer. Obviously, it remains challenging to get materials with a collinear FM order and a strong SOC.…”

Section: Introductionmentioning

confidence: 99%

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Proximity‐Induced Fully Ferromagnetic Order with Eightfold Magnetic Anisotropy in Heavy Transition Metal Oxide CaRuO₃

Zhang,

Chen,

Wang

et al. 2023

Adv Funct Materials

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Ferromagnetic materials with a strong spin‐orbit coupling (SOC) have attracted much attention in recent years because of their exotic properties and potential applications in energy‐efficient spintronics. However, such materials are scarce in nature. Here, a proximity‐induced paramagnetic to ferromagnetic transition for the heavy transition metal oxide CaRuO3 in (001)‐(LaMnO3/CaRuO3) superlattices is reported. Anomalous Hall effect is observed in the temperature range up to 180 K. Maximal anomalous Hall conductivity and anomalous Hall angle are as large as ∼15 Ω−1 cm−1 and ∼0.93%, respectively, by one to two orders of magnitude larger than those of the typical 3d ferromagnetic oxides such as La0.67Sr0.33MnO3. Density functional theory calculations indicate the existence of avoid band crossings in the electronic band structure of the ferromagnetic CRO layer, which enhances Berry curvature thus strong anomalous Hall effects. Further evidences from polarized neutron reflectometry show that the CaRuO3 layers are in a fully ferromagnetic state (∼0.8 μB/Ru), in sharp contrast to the proximity‐induced canted antiferromagnetic state in 5d oxides SrIrO3 and CaIrO3 (∼0.1 μB/Ir). More than that, the magnetic anisotropy of the (001)‐(LaMnO3/CaRuO3) superlattices is eightfold symmetric, showing potential applications in the technology of multistate data storage.

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Section: Resultsmentioning

confidence: 99%

Section: Emergent Ferromagnetism In Cro Induced By Proximity Effectmentioning

confidence: 99%

Section: Spacially-resoveled Magnetic Characterization and Theoretica...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Proximity‐Induced Fully Ferromagnetic Order with Eightfold Magnetic Anisotropy in Heavy Transition Metal Oxide CaRuO₃

Zhang,

Chen,

Wang

et al. 2023

Adv Funct Materials

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Modulation of the optical and transport properties of epitaxial SrNbO3 thin films by defect engineering

Kumar,

Ahammad,

Das

et al. 2024

Journal of Applied Physics

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The discovery of strontium niobate (SNO) as a potentially new transparent electrode has generated much interest due to its implications in various optoelectronic devices. Pristine SNO exhibits exceptionally low resistivity (∼10−4 Ω cm) at room temperature. However, this low resistivity occurs due to large number of carrier concentration in the system, which significantly affects its optical transparency (∼40%) in the visible range and hinders its practical applications as a transparent electrode. Here, we show that modulating the growth kinetics via oxygen manipulation is a feasible approach to achieve the desired optoelectronic properties. In particular, epitaxial (001) SNO thin films are grown on (001) lanthanum aluminate by pulsed laser deposition at different oxygen partial pressures and are shown to improve the optical transparency from 40% to 72% (λ = 550 nm) at a marginal cost of electrical resistivity from 2.8 to 8.1 × 10−4 Ω cm. These changes are directly linked with the multi-valence Nb-states, as evidenced by x-ray photoelectron spectroscopy. Furthermore, the defect-engineered SNO films exhibit multiple electronic phases that include pure metallic, coexisting metal-semiconducting-like, and pure semiconducting-like phases as evidenced by low-temperature electrical transport measurements. The intriguing metal-semiconducting coexisting phase is thoroughly analyzed using both perpendicular and angle-dependent magnetoresistance measurements, further supported by a density functional theory-based first-principles study and the observed feature is explained by the quantum correction to the conductivity. Overall, this study shows an exciting avenue for altering the optical and transport properties of SNO epitaxial thin films for their practical use as a next-generation transparent electrode.

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Exploring anisotropic phases and spin transport in perovskite heterostructures: Insights into 3d/5d interfaces for antiferromagnetic spintronics

Sardar,

Vagadia,

Tank

et al. 2024

Journal of Applied Physics

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Transition metal oxides (TMOs) demonstrate a broad spectrum of properties encompassing electronic correlations, anisotropic transport, magnetism, and optical behavior. The anisotropy arises from both intrinsic crystal symmetry and extrinsic factors like epitaxial strain and structural asymmetry at TMO interfaces. Weiss and Neel's work has elucidated anisotropic magnetic behavior in antiferromagnetic (AFM) materials. AFM TMOs exhibit unique magnetotransport behavior, including weak antilocalization (WAL) and anisotropic magnetoresistance (AMR). Understanding the magnetic structure and band topology in AFM perovskites and their interfaces enables the tailored design of materials for spintronics and energy conversion. In few interfaces lacking inversion symmetry, Rashba spin–orbit coupling (SOC) induces WAL, a quantum correction in conductivity in a two-dimensional electronic system. Electron accumulation and charge transfer across 3d, 5d transition metal-based perovskite interfaces affect WAL and AMR, as observed in 3d/3d and 3d/5d AFM heterostructures, respectively. Advancements in spintronics rely on exploring spin-dependent transport anisotropy. This review focuses on various scattering mechanisms, categorized as extrinsic and intrinsic, in anisotropic transport, particularly in 3d/5d AFM superlattices. The WAL scattering mechanism depends on both intrinsic factors related to Rashba SOC-induced band topology and extrinsic sources like spin impurities and lattice ions. Moreover, the investigation into AMR mechanisms involves the application of impurity-based extrinsic scattering models, which are aligned with the Rashba and Dresselhauss models on Fermi surfaces. This exploration specifically targets the interface of two-band insulators, exemplified by LaAlO3/SrTiO3 and LaVO3/KTaO3. Furthermore, this model achieves comprehensive coverage, extending its applicability to 3d/5d AFM heterostructures like LaMnO3/SrIrO3 and CaMnO3/CaIrO3. Additionally, the intrinsic scattering mechanism tied to Berry phase effects related to band topology is studied, focusing on the CaMnO3/CaIrO3 superlattice. Despite manipulation challenges stemming from reduced stray fields, AFM materials show potential in interface physics and applications within the realm of spintronics.

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Rashba spin-orbit coupling induced modulation of magnetic anisotropy in canted antiferromagnetic heterostructures

Cited by 6 publications

References 52 publications

Proximity‐Induced Fully Ferromagnetic Order with Eightfold Magnetic Anisotropy in Heavy Transition Metal Oxide CaRuO₃

Proximity‐Induced Fully Ferromagnetic Order with Eightfold Magnetic Anisotropy in Heavy Transition Metal Oxide CaRuO₃

Modulation of the optical and transport properties of epitaxial SrNbO3 thin films by defect engineering

Exploring anisotropic phases and spin transport in perovskite heterostructures: Insights into 3d/5d interfaces for antiferromagnetic spintronics

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Rashba spin-orbit coupling induced modulation of magnetic anisotropy in canted antiferromagnetic heterostructures

Cited by 6 publications

References 52 publications

Proximity‐Induced Fully Ferromagnetic Order with Eightfold Magnetic Anisotropy in Heavy Transition Metal Oxide CaRuO3

Proximity‐Induced Fully Ferromagnetic Order with Eightfold Magnetic Anisotropy in Heavy Transition Metal Oxide CaRuO3

Modulation of the optical and transport properties of epitaxial SrNbO3 thin films by defect engineering

Exploring anisotropic phases and spin transport in perovskite heterostructures: Insights into 3d/5d interfaces for antiferromagnetic spintronics

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Proximity‐Induced Fully Ferromagnetic Order with Eightfold Magnetic Anisotropy in Heavy Transition Metal Oxide CaRuO₃

Proximity‐Induced Fully Ferromagnetic Order with Eightfold Magnetic Anisotropy in Heavy Transition Metal Oxide CaRuO₃