|About this Abstract
||Materials Science & Technology 2011
||Interfaces, Grain Boundaries and Surfaces from Atomistic and Macroscopic Approaches -- Fundamental and Engineering Issues
||Robust Isothermal Electric Control of Exchange Bias Aat Room Temperature
||Christian Binek, Xi He, Ning Wu, A. Wysocki, T. Komesu, U. Lanke, A. N. Caruso, E. Vescovo, K. D. Belashchenko, P. A. Dowben
|On-Site Speaker (Planned)
Spintronics relies on tailored interface magnetism, enabling spin-selective transmission or scattering of electrons. Controlling interface magnetism electrically is a key challenge. Most attempts to electrically control magnetism focus on multiferroics. We in contrast report on magnetoelectric Cr<SUB>2</SUB>O<SUB>3</SUB>. Robust isothermal electric control of exchange bias is achieved at room temperature in perpendicular anisotropic Cr<SUB>2</SUB>O<SUB>3</SUB>(0001)/CoPd heterostructures  promising significant implications for potential spintronics. Our finding is macroscopic evidence for roughness-insensitive, electrically controllable equilibrium boundary magnetization in magnetoelectric antiferromagnets. First-principles calculations and symmetry arguments are combined with measurements of spin-resolved UPS, magnetometry, and investigations of electrically controlled exchange bias of Cr<SUB>2</SUB>O<SUB>3</SUB>(0001)/CoPd. Laterally resolved XMCD-PEEM and T-dependent MFM reveal microscopic information of the chromia surface magnetization . Financial support through CAREER DMR-0547887, Nebraska MRSEC, SRC/NSF Supplement to Nebraska MRSEC, NRI, and Cottrell Research Corporation.  Xi He et al., Nature Mater.9, 579–585 (2010).  N. Wu et al., Phys. Rev. Lett. 106, 087202 (2011).
||Definite: A CD-only volume