Coexistance of Giant Tunneling Electroresistance and Magnetoresistance in an All-Oxide Composite Magnetic Tunnel Junction
Permanent link to this recordhttp://hdl.handle.net/10754/597793
MetadataShow full item record
AbstractWe propose, by performing advanced abinitio electron transport calculations, an all-oxide composite magnetic tunnel junction, within which both large tunneling magnetoresistance (TMR) and tunneling electroresistance (TER) effects can coexist. The TMR originates from the symmetry-driven spin filtering provided by an insulating BaTiO3 barrier to the electrons injected from the SrRuO3 electrodes. Following recent theoretical suggestions, the TER effect is achieved by intercalating a thin insulating layer, here SrTiO3, at one of the SrRuO3/BaTiO3 interfaces. As the complex band structure of SrTiO3 has the same symmetry as that of BaTiO3, the inclusion of such an intercalated layer does not negatively alter the TMR and in fact increases it. Crucially, the magnitude of the TER also scales with the thickness of the SrTiO3 layer. The SrTiO3 thickness becomes then a single control parameter for both the TMR and the TER effect. This protocol offers a practical way to the fabrication of four-state memory cells. © 2012 American Physical Society.
CitationCaffrey NM, Archer T, Rungger I, Sanvito S (2012) Coexistance of Giant Tunneling Electroresistance and Magnetoresistance in an All-Oxide Composite Magnetic Tunnel Junction. Physical Review Letters 109. Available: http://dx.doi.org/10.1103/PhysRevLett.109.226803.
SponsorsThis work is sponsored by Science Foundation of Ireland (07/IN.1/I945) and by the EU-FP7 (ATHENA and iFOX projects). I. R. is sponsored by the King Abdullah University of Science and Technology (ACRAB project). Computational resources have been provided by the HEA IITAC project managed by TCHPC.
PublisherAmerican Physical Society (APS)
JournalPhysical Review Letters
CollectionsPublications Acknowledging KAUST Support
- Enhanced Tunneling Electroresistance in Ferroelectric Tunnel Junctions due to the Reversible Metallization of the Barrier.
- Authors: Liu X, Burton JD, Tsymbal EY
- Issue date: 2016 May 13
- Giant magnetoresistance and tunneling electroresistance in multiferroic tunnel junctions with 2D ferroelectrics.
- Authors: Chen Y, Tang Z, Dai M, Luo X, Zheng Y
- Issue date: 2022 Jun 23
- Tunneling magnetoresistance on the subnanometer scale.
- Authors: Heiliger C, Gradhand M, Zahn P, Mertig I
- Issue date: 2007 Aug 10
- Negative spin polarization and large tunneling magnetoresistance in epitaxial Co/SrTiO(3)/Co magnetic tunnel junctions.
- Authors: Velev JP, Belashchenko KD, Stewart DA, van Schilfgaarde M, Jaswal SS, Tsymbal EY
- Issue date: 2005 Nov 18
- Polarity-tunable spin transport in all-oxide multiferroic tunnel junctions.
- Authors: Soni R, Petraru A, Nair HS, Vavra O, Ziegler M, Kim SK, Jeong DS, Kohlstedt H
- Issue date: 2016 May 19