Large room-temperature tunneling magnetoresistance of "bulrush- like" double perovskite Ba2FeMoO6

W. Zhong*, N. J. Tang, Chak Tong AU, Y. W. Du

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

We conducted magnetic and transport measurements on two Ba 2FeMoO6 double perovskite samples prepared by wet chemistry and solid-state reaction methods, respectively. The one synthesized by the latter is in the form of Isotropie grains. The "bulrush-like" Ba2FeMoO6 sample fabricated by wet chemistry is high in aspect ratio and Fe/Mo ordering. Utilizing the high shape anisotropy of the sample, we obtained a material with electric anisotropy where the long axis of the sample is almost parallel to the plane of the pellet. With carrier transport perpendicular to the plane, there was an appreciable increase in room-temperature tunneling magnetoresistance (TMR) response (from 22% to 31% at 10 kOe) while the concentration of Fe/Mo disorder remained unchanged. Experimental results indicate that the TMR value could be greatly enhanced by adjusting the nature and amount of grain boundary (GB) insulating barriers.

Original languageEnglish
Pages (from-to)3079-3081
Number of pages3
JournalIEEE Transactions on Magnetics
Volume43
Issue number6
DOIs
Publication statusPublished - Jun 2007

Scopus Subject Areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

User-Defined Keywords

  • Magnetic materials
  • Magnetoresistance
  • Oxygen compounds

Fingerprint

Dive into the research topics of 'Large room-temperature tunneling magnetoresistance of "bulrush- like" double perovskite Ba<sub>2</sub>FeMoO<sub>6</sub>'. Together they form a unique fingerprint.

Cite this