TITLE

Chemical-pressure tailoring of low-field, room-temperature magnetoresistance in (Ca, Sr, Ba)Fe[sub 0.5]Mo[sub 0.5]O[sub 3]

AUTHOR(S)
Kim, Bog-Gi; Hor, Yew-San; Cheong, S-W.
PUB. DATE
July 2001
SOURCE
Applied Physics Letters;7/16/2001, Vol. 79 Issue 3
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Low-field intergrain magnetoresistance (IMR) in the polycrystalline materials of double perovskite SrFe[sub 0.5]Mo[sub 0.5]O[sub 3] is found to be highly tunable by doping either Ca or Ba into the Sr site. The dopant exerts a chemical pressure, changing the Curie temperature and the magnetic softness. The room-temperature IMR at optimal doping (Sr[sub 0.2]Ba[sub 0.8]Fe[sub 0.5]Mo[sub 0.5]O[sub 3]) is approximately 3.5% in 100 Oe, and increases further in high fields. The unprecedented magnitude of the IMR in this highly spin polarized system provides future grounds for employing magnetic materials for innovative magnetic technology. © 2001 American Institute of Physics.
ACCESSION #
4812762

 

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