Great efforts have been devoted to exploring the emergent
phenomena
occurring in heterostructures of correlated oxides. However, the presence
of both magnetic and electrical dead layers in functional oxide films
generally obstructs the device functionalization and miniaturization.
Here, we demonstrate an effective strategy to significantly reduce
the thickness of dead layers in a prototypical correlated oxide system,
La0.7Sr0.3MnO3 (LSMO) grown on LaAlO3 (LAO) substrates, via strain engineering by inserting a Sr3Al2O6 buffer layer with a different
thickness at heterointerfaces. In this way, the thicknesses of the
magnetic and electrical dead layers of LSMO films on the LAO substrates
notably decrease from 8 to 4 unit cells and from 13 to 9 unit cells,
respectively. Our results provide a convenient method to minimize
or even eliminate the dead layers of correlated oxides through the
interfacial strain engineering, which has potential applications in
nanoscale oxide spintronic devices.
We report a universal method to transfer freestanding La0.7Sr0.3MnO3 membranes to target substrates. The 4-uc-thick freestanding La0.7Sr0.3MnO3 membrane exhibits the enhanced ferromagnetism, conductivity and out-of-plane magnetic anisotropy, which otherwise shows nonmagnetic/antiferromagnetic and insulating behavior due to the intrinsic epitaxial strain. This work facilitates the promising applications of ultrathin freestanding correlated oxide membranes in electronics and spintronics.
This study examined the effectiveness of a bilingual education program in business English major in Chinese education. Participants were 100 undergraduate students enrolled in their third year education program at a university in South-central University for Nationalities Wuhan, China. The research evidence indicates that, the use of English as medium of instruction in teaching is effective participants also confirms as the more they interact and get familiar with the medium of instruction. Furthermore, this implies that using bilingualism in teaching does contribute good effect in student's engagement and academic performance. A mixed-methodological approach was used accompanied by a semi-structured interview of 100 undergraduate students majoring in Business English to better understand the efficacy of bilingual education programs. Both quantitative and qualitative results suggested that the bilingual education model successfully enhanced students' level of English proficiency and the mastery of subject knowledge teaching quality was another aspect considered to be important factor in this research associated with the bilingual education program for Business English Major. Strengths and weaknesses of the business English major in bilingual education program model and its implications for educational practices in South-central University for Nationalities Wuhan-China education were explored.
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