Nanoscale electroresistance properties of all-oxide magneto-electric tunnel junction with ultra-thin barium titanate barrier
Abstract
Tunnel electroresistance properties have been investigated at the nanoscale for prototype magneto-electric tunnel junctions (METJ) consisting of ferroelectric BaTiO3 and ferromagnetic La0.67Sr0.33MnO3 heterostructures. Combining piezoresponse force and conductive atomic force microscopy, we demonstrate robust and reproducible polarization-dependent tunneling behavior with a resistance ratio between the two polarization states as high as 60 for a 3 unit cell (∼1.2 nm) BaTiO3 tunnel barrier. Our work demonstrates that METJs are scalable down to barrier layer thicknesses comparable to commercial spintronic devices.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 04, 2013
- Source ID
- 10.1063/1.4791699
Entities
People
- Anu Gupta
- D. Mazumdar
- Garam Kim
Organizations
- National Science Foundation
- Office of Naval Research
- University of Alabama