Lateral electric-field control of giant magnetoresistance in Co/Cu/Fe/BaTiO{sub 3} multiferroic heterostructure

Journal Article · Mon Aug 17 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4929339· OSTI ID:22489118

Savitha Pillai, S.; Kojima, H.; Itoh, M.

We report lateral electric-field-driven sizable changes in the magnetoresistance of Co/Cu/Fe tri-layered wires on BaTiO{sub 3} single crystal. While the observed change is marginal in the tetragonal phase of BaTiO{sub 3}, it reaches over 40% in the orthorhombic and rhombohedral phases with an electric field of 66 kV/cm. We attribute it to possible electric-field-induced variations of the spin-dependent electronic structures, i.e., spin polarization, of the Fe via interfacial strain transfer from BaTiO{sub 3}. The contrasting results for the different phases of BaTiO{sub 3} are discussed, associated with the distinct aspects of the ferroelectric polarization switching processes in each phase.

• OSTI ID: 22489118
• Journal Information: Applied Physics Letters, Vol. 107, Issue 7; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRIC FIELDS
ELECTRONIC STRUCTURE
FERROELECTRIC MATERIALS
MAGNETORESISTANCE
MONOCRYSTALS
ORTHORHOMBIC LATTICES
POLARIZATION
SPIN
SPIN ORIENTATION
STRAINS
TITANATES
TRIGONAL LATTICES
VARIATIONS
WIRES