Year: 2020
Type: preprint
Abstract: Epitaxial strain provides important pathways to control the magnetic and electronic states in transition metal oxides. However, the large strain is usually accompanied by a strong reduction of the oxygen vacancy formation energy, which hinders the direct manipulation of their intrinsic properties. Here using a post-deposition ozone annealing method, we obtained a series of oxygen stoichiometric SrCoO3 thin films with the tensile strain up to 3.0%. We observed a robust ferromagnetic ground state in all strained thin films, while interestingly the tensile strain triggers a distinct metal to insulator transition along with the increase of the tensile strain. The persistent ferromagnetic state across the electrical transition therefore suggests that the magnetic state is directly correlated with the localized electrons, rather than the itinerant ones, which then calls for further investigation of the intrinsic mechanism of this magnetic compound beyond the double-exchange mechanism.
Source: arXiv (Cornell University)
Institutions: Beijing Academy of Quantum Information Sciences, Frontier Science Center for Quantum Information of the Ministry of Education of China, Tsinghua University, Durham University, Oak Ridge National Laboratory, Chinese Academy of Sciences, Institute of Physics, University of Tsukuba, State Key Laboratory of New Ceramics and Fine Processing, Lawrence Berkeley National Laboratory, Advanced Light Source, RIKEN Center for Emergent Matter Science, The University of Tokyo
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
Funders: U.S. Department of Energy, National Natural Science Foundation of China, Chinese Academy of Sciences, Beijing Innovation Center for Future Chip, Office of Science, Engineering and Physical Sciences Research Council, National Key Research and Development Program of China, Basic Energy Sciences, Oak Ridge National Laboratory, Northwest Fisheries Science Center
Awards: G1138893065, G1286236842, G1286251239, G1369528958, G2618837358, G3022319276, G30714459, G3083819904, G3114243037, G3327601824, Explore novel ferroelectric properties in BiFeO3 multiferroic mesocrystal, G419881185, G4205563108, G42916606, G4501827968, 过渡金属氧化物BiMnO3的应力调控与多铁特性研究, G498139845, G5439376616, G5885311417, G650090426, G660579501, G6652958823, G704498496, G7262807618, G969889393
OpenAlex ID: W3013789438