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      SCOPUS SCIE

      Emergent Topological Hall Effect in La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub>/SrIrO<sub>3</sub> Heterostructures

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      https://www.riss.kr/link?id=A107449017

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      <P>Recently, perovskite oxide heterostructures have drawn great attention because multiple and complex coupling at the heterointerface may produce novel magnetic and electric phenomena that are not expected in homogeneous materials either in the bulk or in films. In this work, we report for the first time that an emergent giant topological Hall effect (THE), associated with a noncoplanar (NC) spin texture, can be induced in ferromagnetic (FM) La<SUB>0.7</SUB>Sr<SUB>0.3</SUB>MnO<SUB>3</SUB> thin films in a wide temperature range of up to 200 K by constructing La<SUB>0.7</SUB>Sr<SUB>0.3</SUB>MnO<SUB>3</SUB>/SrIrO<SUB>3</SUB> epitaxial heterostructures on (001) SrTiO<SUB>3</SUB> substrates. This THE is not observed in La<SUB>0.7</SUB>Sr<SUB>0.3</SUB>MnO<SUB>3</SUB> single-layer films or La<SUB>0.7</SUB>Sr<SUB>0.3</SUB>MnO<SUB>3</SUB>/SrTiO<SUB>3</SUB>/SrIrO<SUB>3</SUB> trilayer heterostructures, indicating the relevance of the La<SUB>0.7</SUB>Sr<SUB>0.3</SUB>MnO<SUB>3</SUB>/SrIrO<SUB>3</SUB> interface, where the Dzyaloshinskii-Moriya interaction due to strong spin-orbital coupling in SrIrO<SUB>3</SUB> may play a crucial role. The fictitious field associated with THE is independent of temperature in La<SUB>0.7</SUB>Sr<SUB>0.3</SUB>MnO<SUB>3</SUB>/SrIrO<SUB>3</SUB> heterostructures, suggesting that the NC spin texture may be magnetic skyrmions. This work demonstrates the feasibility of using SrIrO<SUB>3</SUB> to generate novel magnetic and transport characteristics by interfacing with other correlated oxides, which might be useful to novel spintronic applications.</P>
      [FIG OMISSION]</BR>
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      <P>Recently, perovskite oxide heterostructures have drawn great attention because multiple and complex coupling at the heterointerface may produce novel magnetic and electric phenomena that are not expected in homogeneous materials either in the...

      <P>Recently, perovskite oxide heterostructures have drawn great attention because multiple and complex coupling at the heterointerface may produce novel magnetic and electric phenomena that are not expected in homogeneous materials either in the bulk or in films. In this work, we report for the first time that an emergent giant topological Hall effect (THE), associated with a noncoplanar (NC) spin texture, can be induced in ferromagnetic (FM) La<SUB>0.7</SUB>Sr<SUB>0.3</SUB>MnO<SUB>3</SUB> thin films in a wide temperature range of up to 200 K by constructing La<SUB>0.7</SUB>Sr<SUB>0.3</SUB>MnO<SUB>3</SUB>/SrIrO<SUB>3</SUB> epitaxial heterostructures on (001) SrTiO<SUB>3</SUB> substrates. This THE is not observed in La<SUB>0.7</SUB>Sr<SUB>0.3</SUB>MnO<SUB>3</SUB> single-layer films or La<SUB>0.7</SUB>Sr<SUB>0.3</SUB>MnO<SUB>3</SUB>/SrTiO<SUB>3</SUB>/SrIrO<SUB>3</SUB> trilayer heterostructures, indicating the relevance of the La<SUB>0.7</SUB>Sr<SUB>0.3</SUB>MnO<SUB>3</SUB>/SrIrO<SUB>3</SUB> interface, where the Dzyaloshinskii-Moriya interaction due to strong spin-orbital coupling in SrIrO<SUB>3</SUB> may play a crucial role. The fictitious field associated with THE is independent of temperature in La<SUB>0.7</SUB>Sr<SUB>0.3</SUB>MnO<SUB>3</SUB>/SrIrO<SUB>3</SUB> heterostructures, suggesting that the NC spin texture may be magnetic skyrmions. This work demonstrates the feasibility of using SrIrO<SUB>3</SUB> to generate novel magnetic and transport characteristics by interfacing with other correlated oxides, which might be useful to novel spintronic applications.</P>
      [FIG OMISSION]</BR>

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