Ultrafast carrier dynamics and radiative recombination in multiferroic BiFeO<sub>3</sub>single crystals and thin films

Sheu, Yae‐Lin; Trugman, S. A.; Xiong, Jie; Park, Y. S.; Lee, S.; Yi, Hyunjung; Cheong, Sang‐Wook; Jia, Q. X.; Taylor, A. J.; Prasankumar, R. P.

doi:10.1051/epjconf/20134103018

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…[43], and comparison of the dynamics between BFO single crystals and films is available in Ref. [53]. In addition, if a photostrictive effect arising from the BFO layer somehow influenced our data, we would expect to see a significant difference between the dynamics in LCMO/BFO/STO and LCMO/STO at all temperatures, which is not the case at high temperatures (Fig.…”

Section: Appendix B: Exclusion Of Other Possible Contributions To Our...mentioning

confidence: 83%

Polaronic Transport Induced by Competing Interfacial Magnetic Order in aLa0.7Ca0.3MnO3/BiFe

Sheu

Trugman

et al. 2014

Phys. Rev. X

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Using ultrafast optical spectroscopy, we show that polaronic behavior associated with interfacial antiferromagnetic order is likely the origin of tunable magnetotransport upon switching the ferroelectric polarity in a La 0.7 Ca 0.3 MnO 3 =BiFeO 3 (LCMO/BFO) heterostructure. This is revealed through the difference in dynamic spectral weight transfer between LCMO and LCMO/BFO at low temperatures, which indicates that transport in LCMO/BFO is polaronic in nature. This polaronic feature in LCMO/BFO decreases in relatively high magnetic fields due to the increased spin alignment, while no discernible change is found in the LCMO film at low temperatures. These results thus shed new light on the intrinsic mechanisms governing magnetoelectric coupling in this heterostructure, potentially offering a new route to enhancing multiferroic functionality. The quest to achieve strong magnetoelectric coupling has driven the surge in research on multiferroic materials over the past decade. However, this has been quite difficult to accomplish using bulk materials, motivating researchers to explore other approaches, most notably the use of transition metal oxide heterostructures [1][2][3]. In these novel systems, different degrees of freedom (DOFs) (e.g., charge, spin, and orbital) are coupled at a single interface between two different oxide layers to form a new state that displays properties dramatically different from those of the individual layers [4][5][6][7][8]. Particular attention has been given to the coupling between ferromagnetic (FM), antiferromagnetic (AFM), and ferroelectric (FE) orders, as this could reveal new routes to realizing strong magnetoelectric coupling [1][2][3][9][10][11].Heterostructures consisting of manganite and multiferroic layers are particularly promising in this regard. The most extensively studied combination [2,3,9,10,12] consists of the colossal magnetoresistive manganite La 0.7 Sr 0.3 MnO 3 (LSMO) [or the similar compound La 0.7 Ca 0.3 MnO 3 (LCMO)], which is ferromagnetic below a critical temperature T c , and the canonical multiferroic BiFeO 3 (BFO), which has coexisting coupled AFM and FE phases in which the magnetization can be switched by an applied electric (E) field [13]. The combination of these materials thus has great potential for exhibiting novel phenomena by coupling different FM, AFM, and FE phases across the interface. Indeed, a new interfacial state between LSMO and BFO has been discovered experimentally and discussed theoretically [2,[14][15][16]. This state displays an exchange-bias field and magnetotransport that can be tuned by switching the FE polarization, increasing the potential for device control through interfacial coupling. However, a complete picture of the interplay between FM and AFM orders in this heterostructure has yet to be reached.Current understanding of the exchange-bias field, which arises from the interaction between FM and G-type AFM [AFMðGÞ] orders at the interface, is based on spin canting or pinning in BFO, with the assumption of negligible canting in ...

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Section: Appendix B: Exclusion Of Other Possible Contributions To Our...mentioning

confidence: 83%

Polaronic Transport Induced by Competing Interfacial Magnetic Order in aLa0.7Ca0.3MnO3/BiFe

Sheu

Trugman

et al. 2014

Phys. Rev. X

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“…Perovskite BiFeO 3 , with special multiferroic property for recycling, is another emerging bismuth-based multinary metal oxide showing great potential for photodegradation of organic pollutants due to its high visible light response [10][11][12]. However, both CuBi 2 O 4 and BiFeO 3 suffer from severe carrier recombination due to their intrinsic low polaron conductivity [13,14], which significantly limits their photocatalytic activities [15][16][17][18]. One way to suppress the carrier recombination is to form heterojunctions by combining two semiconductors.…”

Section: Introductionmentioning

confidence: 99%

One Step Synthesis of Tetragonal-CuBi2O4/Amorphous-BiFeO3 Heterojunction with Improved Charge Separation and Enhanced Photocatalytic Properties

et al. 2020

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Tetragonal CuBi2O4/amorphous BiFeO3 (T-CBO/A-BFO) composites are prepared via a one-step solvothermal method at mild conditions. The T-CBO/A-BFO composites show expanded visible light absorption, suppressed charge recombination, and consequently improved photocatalytic activity than T-CBO or A-BFO alone. The T-CBO/A-BFO with an optimal T-CBO to A-BFO ratio of 1:1 demonstrates the lowest photoluminescence signal and highest photocatalytic activity. It shows a removal rate of 78.3% for the photodegradation of methylene orange under visible light irradiation for 1 h. XPS test after the cycle test revealed the reduction of Bi3+ during the photocatalytic reaction. Moreover, the as prepared T-CBO/A-BFO show fundamentally higher photocatalytic activity than their calcinated counterparts. The one-step synthesis is completed within 30 min and does not require post annealing process, which may be easily applied for the fast and cost-effective preparation of photoactive metal oxide heterojunctions.

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Structural, Optical, and Electrophysical Properties of La0.13Bi0.87FeO3 Films Obtained by High-Frequency Laser Evaporation in Vacuum

Bushinsky,

Chobot,

Baran

et al. 2024

J Appl Spectrosc

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Ultrafast carrier dynamics and radiative recombination in multiferroic BiFeO₃single crystals and thin films

Cited by 3 publications

References 7 publications

Polaronic Transport Induced by Competing Interfacial Magnetic Order in aLa0.7Ca0.3MnO3/BiFe

Polaronic Transport Induced by Competing Interfacial Magnetic Order in aLa0.7Ca0.3MnO3/BiFe

One Step Synthesis of Tetragonal-CuBi2O4/Amorphous-BiFeO3 Heterojunction with Improved Charge Separation and Enhanced Photocatalytic Properties

Structural, Optical, and Electrophysical Properties of La0.13Bi0.87FeO3 Films Obtained by High-Frequency Laser Evaporation in Vacuum

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Ultrafast carrier dynamics and radiative recombination in multiferroic BiFeO3single crystals and thin films

Cited by 3 publications

References 7 publications

Polaronic Transport Induced by Competing Interfacial Magnetic Order in aLa0.7Ca0.3MnO3/BiFe

Polaronic Transport Induced by Competing Interfacial Magnetic Order in aLa0.7Ca0.3MnO3/BiFe

One Step Synthesis of Tetragonal-CuBi2O4/Amorphous-BiFeO3 Heterojunction with Improved Charge Separation and Enhanced Photocatalytic Properties

Structural, Optical, and Electrophysical Properties of La0.13Bi0.87FeO3 Films Obtained by High-Frequency Laser Evaporation in Vacuum

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Ultrafast carrier dynamics and radiative recombination in multiferroic BiFeO₃single crystals and thin films