Title of article :
Ordered double-perovskite Ca2FeMoO6 compounds with nanometer-scale grains: structure, magnetism, and intergrain tunneling magnetoresistance
Author/Authors :
Dai، نويسنده , , J.M. and Song، نويسنده , , W.H. and Wang، نويسنده , , S.G. and Ye، نويسنده , , S.L. and Wang، نويسنده , , K.Y. and Du، نويسنده , , J.J. and Sun، نويسنده , , Y.P and Fang، نويسنده , , J. and Chen، نويسنده , , J.L. and Gao، نويسنده , , B.J.، نويسنده ,
Abstract :
Polycrystalline ordered double-perovskite Ca2FeMoO6 bulk samples with nanometer-scale grain size have been synthesized using a sol–gel method. A large magnetoresistance (MR) of 7.6% at a low magnetic field of 0.5 T and room temperature is obtained. The result of ac susceptibility shows that the sample has two magnetic transitions at TC1=374.6 K and TC2=336.4 K, which may correspond to the orthorhombic structure and the monoclinic structure phase, respectively. Due to the large MR at room temperature and well ferromagnetic conductivity of Ca2FeMoO6, it may be a desirable material for practical applications in future.
