TITLE

Room-temperature ferromagnetism in chemically synthesized Sn1-xCoxO2 powders

AUTHOR(S)
Punnoose, A.; Hays, J.; Gopal, V.; Shutthanandan, V.
PUB. DATE
August 2004
SOURCE
Applied Physics Letters;8/30/2004, Vol. 85 Issue 9, p1559
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Room-temperature ferromagnetism is observed in chemically synthesized powder samples of Sn1-xCoxO2 with x=0.005 and 0.01. Magnetic hysteresis loops are observed at 300 K with coercivity Hc∼630 Oe, saturation magnetization Ms∼0.133μB/Co ion, and about 31% remanence. Analyses of the magnetization data of paramagnetic samples with x=0.01 and 0.03, measured as a function of temperature (3–330 K) and magnetic field (up to 65 kOe), indicate the presence of Co+2 ions with spin S=3/2. Magnetic data obtained from samples prepared at different temperatures indicate that the observed ferromagnetism for x≤0.01 might have been triggered by changes in the oxygen stoichiometry.
ACCESSION #
14258794

 

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