Grain-boundary magnetoresistance in manganites: Spin-polarized inelastic tunneling through a spin-glass-like barrier
- 1 July 1999
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 60 (2) , R738-R741
- https://doi.org/10.1103/physrevb.60.r738
Abstract
The grain-boundary magnetoresistance of various samples was investigated by resistance, magnetoresistance, and dynamic conductance measurements. Data on five samples, namely an epitaxial film, a polycrystalline film, a step-edge array, a mechanically induced grain boundary, and a chromium-manganite tunneling contact, are presented. A model of spin-polarized inelastic tunneling through an insulating barrier with spin-glass-like characteristics is proposed that explains the experimental observations.
Keywords
This publication has 13 references indexed in Scilit:
- Step-edge magnetoresistance in La0.7Ca0.3MnO3 filmsApplied Physics Letters, 1999
- Transport across conducting ferromagnetic oxide/metal interfacesApplied Physics Letters, 1998
- Magnetoresistance of mechanically induced grain boundaries in La0.7Ca0.3MnO3 filmsApplied Physics Letters, 1998
- Defect-induced spin disorder and magnetoresistance in single-crystal and polycrystal rare-earth manganite thin filmsPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 1998
- Magnetic localization and magnetoresistance in mixed–valence manganites and related ferromagnetic oxidesPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 1998
- Conduction mechanisms in c-axis oriented YBCO based trilayer junctions with ferromagnetic A/sub 0.7/B/sub 0.3/MnO/sub 3/ manganite barriersIEEE Transactions on Applied Superconductivity, 1997
- Electronic Raman scattering from Mn exhibiting giant magnetoresistancePhysical Review B, 1996
- Spin-Polarized Intergrain Tunneling inPhysical Review Letters, 1996
- Tunneling between ferromagnetic filmsPhysics Letters A, 1975
- Generalized Formula for the Electric Tunnel Effect between Similar Electrodes Separated by a Thin Insulating FilmJournal of Applied Physics, 1963