2013/07/31 by Yaohua Liu, F. A. Cuellar, Fabián Cuellar +8 · 32 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Cuprate #Electron #Electronic and Structural Properties of Oxides #Ferromagnetism #Magnetic and transport properties of perovskites and related materials #Magnetic field #Magnetization #Magnetoresistance #Manganite #Materials science #Physics #Spin (aerodynamics) #Spin polarization #Superconductivity #cond-mat.mes-hall #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.111.247203
published in Physical Review Letters 111(24), 247203 (American Physical Society) · 5 pages, 4 figures, with supplemental materials (2 figures). Physical Review Letters, in press
arxiv created 2013/12/04 · openalex publication_date 2013/12/11 · arxiv updated 2013/12/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report a strong effect of interface-induced magnetization on the transport properties of magnetic tunnel junctions consisting of ferromagnetic manganite La0.7Ca0.3MnO3 and insulating cuprate PrBa2Cu3O7. Contrary to the typically observed steady increase of the tunnel magnetoresistance with decreasing temperature, this system exhibits a sudden anomalous decrease at low temperatures. Interestingly, this anomalous behavior can be attributed to the competition between the positive spin polarization of the manganite contacts and the negative spin-filter effect from the interface-induced Cu magnetization.