Low-field magnetoresistance and magnetic study of Ba/sub 2/Fe/sub 1+x/Mo/sub 1-x/O/sub 6/

Author

Lee, Woo Y. ; Han, Hu ; Kim, S.B. ; Kim, C.S. ; Lee, B.W.

Author_Institution

Dept. of Phys., HUFS, Yongin, South Korea

fYear

2002

Abstract

Summary form only given. Ba/sub 2/FeMoO/sub 6/ (BFMO) shows room temperature magnetoresistance (MR) and ferrimagnetic phase transition with T/sub c//spl sim/320-340 K. This compound has an ordered double perovskite structure, in which the Fe and Mo ions are arranged alternatively with ideal saturation moment of 4 /spl mu//sub B//f.u. Low-field MR in BFMO can be explained by intergrain tunneling due to spin dependent scattering at the grain boundary and the degree of ordering.

Keywords

Curie temperature; barium compounds; crystal structure; ferrimagnetic materials; grain boundaries; iron compounds; magnetic moments; tunnelling magnetoresistance; 20 C; 320 to 340 K; Ba/sub 2/Fe/sub 1+x/Mo/sub 1-x/O/sub 6/; T/sub c/; ferrimagnetic phase transition; grain boundary; ideal saturation moment; intergrain tunneling; low-field magnetoresistance; magnetic study; ordered double perovskite structure; ordering; room temperature magnetoresistance; spin dependent scattering; Conductivity; Iron; Magnetic fields; Magnetoresistance; Physics; Powders; Saturation magnetization; Solid state circuits; Temperature; Tunneling;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2002. INTERMAG Europe 2002. Digest of Technical Papers. 2002 IEEE International

Conference_Location

Amsterdam, The Netherlands

Print_ISBN

0-7803-7365-0

Type

conf

DOI

10.1109/INTMAG.2002.1000901

Filename

1000901