Large room-temperature tunneling magnetoresistance effect in Ba 2Fe 1.1Mo 0.9O 6

Abstract

We conducted magnetic and transport measurements on the “bulrush-like” double perovskite Ba 2Fe 1.1Mo 0.9O 6 generated in a wet chemistry method. The sample contains Ba 2Fe 1.1Mo 0.9O 6 crystallites with average width of 120 nm and length larger than 2 μm. Utilizing the bulrush-like sample of high aspect ratio, we have fabricated a material of electric anisotropy with large tunneling magnetoresistance, Δ ρ/ ρ 0, −34.5–−26.6% at a low magnetic field of 10 kOe over a wide temperature range from 80 to 300 K.