2003/09/11 by Teruo Ono, T. Ono, A. Kogusu +7
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Curie temperature #Electronic and Structural Properties of Oxides #Ferromagnetic resonance #Ferromagnetism #Magnetic and transport properties of perovskites and related materials #Magnetic field #Magnetization #Magnetoresistance #Manganite #Materials science #Paramagnetism #Physics #Spins #cond-mat.mtrl-sci
paper · pdf · doi:10.1063/1.1690877
12 pages, 4 figures
arxiv created 2003/09/11 · openalex publication_date 2004/03/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We report a spin-injection effect found for a manganite using a specially fabricated sample. A wire of La0.7Sr0.3MnO3 was patterned by means of focused ion beam etching, and the center was subsequently lightly irradiated with Ga+ ions. The ferromagnetic Curie temperature was reduced locally by the irradiation from TC to TC′, and thus a sequential ferromagnetic/paramagnetic/ferromagnetic structure was realized along the wire between TC and TC′. The injection of spin-polarized current from the ferromagnetic manganite into the paramagnetic part rendered the latter ferromagnetic and more conductive. This can be explained by assuming the suppression of spin fluctuation in the paramagnet by the spins injected.