Hidden peculiar magnetic anisotropy at the interface in a ferromagnetic perovskite-oxide heterostructure
Autor: | Shinobu Ohya, Le Duc Anh, Masaaki Tanaka, Noboru Okamoto, Hitoshi Tabata, Munetoshi Seki |
---|---|
Rok vydání: | 2017 |
Předmět: |
Materials science
Magnetoresistance Science FOS: Physical sciences 02 engineering and technology 01 natural sciences Article symbols.namesake Magnetization Condensed Matter::Materials Science 0103 physical sciences 010306 general physics Perovskite (structure) Condensed Matter - Materials Science Multidisciplinary Spintronics Condensed matter physics Fermi level Materials Science (cond-mat.mtrl-sci) Heterojunction 021001 nanoscience & nanotechnology Magnetic anisotropy Ferromagnetism symbols Medicine Condensed Matter::Strongly Correlated Electrons 0210 nano-technology |
Zdroj: | Scientific Reports Scientific Reports, Vol 7, Iss 1, Pp 1-7 (2017) |
ISSN: | 2045-2322 |
Popis: | Understanding and controlling the interfacial magnetic properties of ferromagnetic thin films are crucial for spintronic device applications. However, using conventional magnetometry, it is difficult to detect them separately from the bulk properties. Here, by utilizing tunneling anisotropic magnetoresistance in a single-barrier heterostructure composed of La0.6Sr0.4MnO3 (LSMO)/LaAlO3 (LAO)/Nb-doped SrTiO3 (001), we reveal the presence of a peculiar strong two-fold magnetic anisotropy (MA) along the [110]c direction at the LSMO/LAO interface, which is not observed in bulk LSMO. This MA shows unknown behavior that the easy magnetization axis rotates by 90° at an energy of 0.2 eV below the Fermi level in LSMO. We attribute this phenomenon to the transition between the eg and t2g bands at the LSMO interface. Our finding and approach to understanding the energy dependence of the MA demonstrate a new possibility of efficient control of the interfacial magnetic properties by controlling the band structures of oxide heterostructures. |
Databáze: | OpenAIRE |
Externí odkaz: |