TY - JOUR
T1 - Effect of la doping on magnetotransport and magnetic properties of double perovskite Sr2FeMoO6 system
AU - Narsinga Rao, G.
AU - Roy, Saibal
AU - Mou, Chung Yuan
AU - Chen, J. W.
N1 - Funding Information:
This work has been supported by National Science Council of ROC under Grant No. NSC 90-2112-M-002-042.
PY - 2006/4
Y1 - 2006/4
N2 - We have investigated the magnetotransport and magnetic properties on polycrystalline samples of Sr2-xLaxFeMoO 6 (x=0, 0.2, 0.4, 0.6, 0.8 and 1.0). The magnitude of intergrain tunneling magnetoresistance with low magnetic field of 0.88 T for x=0.2 and 0.4 samples are as large as 5% and 7% at room temperature and 13% and 10% at 10 K, respectively. The increase of coercivity (Hc), ratio of remanent magnetization with respect to saturation magnetization (Mr/Ms), high saturation fields, and reduction of the saturation magnetization indicate that random disorder of spin orientation is mainly responsible for enhancement of the low-field magnetoresistance for samples with x≤0.4. Whereas rapid drop of Hc, Mr/Ms, Mr, and saturation fields for samples with x>0.4 signifies the growth of antiphase boundary, which gives rise to lower values of low-field MR.
AB - We have investigated the magnetotransport and magnetic properties on polycrystalline samples of Sr2-xLaxFeMoO 6 (x=0, 0.2, 0.4, 0.6, 0.8 and 1.0). The magnitude of intergrain tunneling magnetoresistance with low magnetic field of 0.88 T for x=0.2 and 0.4 samples are as large as 5% and 7% at room temperature and 13% and 10% at 10 K, respectively. The increase of coercivity (Hc), ratio of remanent magnetization with respect to saturation magnetization (Mr/Ms), high saturation fields, and reduction of the saturation magnetization indicate that random disorder of spin orientation is mainly responsible for enhancement of the low-field magnetoresistance for samples with x≤0.4. Whereas rapid drop of Hc, Mr/Ms, Mr, and saturation fields for samples with x>0.4 signifies the growth of antiphase boundary, which gives rise to lower values of low-field MR.
KW - Double perovskites
KW - Electron doping
KW - Magnetic properties
KW - Magnetoresistance
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U2 - 10.1016/j.jmmm.2005.04.023
DO - 10.1016/j.jmmm.2005.04.023
M3 - Article
AN - SCOPUS:27844550211
SN - 0304-8853
VL - 299
SP - 348
EP - 355
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
IS - 2
ER -