Magnetic and magneto-transport properties of double perovskite Ba2-xSrxFeMoO6 system

被引：31
作者：
Pandey, Vibhav [1 ]
Verma, Vivek [1 ]
Aloysius, R. P. [1 ]
Bhalla, G. L. [2 ]
Awana, V. P. S. [1 ]
Kishan, H. [1 ]
Kotnala, R. K. [1 ]
机构：
[1] Natl Phys Lab, New Delhi 110012, India
[2] Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2009年 / 321卷 / 14期
关键词：
Ba2FeMoO6; Double perovskite; Magneto-resistance; Magnetization; ROOM-TEMPERATURE; MAGNETORESISTANCE; DISORDER; OXIDE;
D O I：
10.1016/j.jmmm.2009.01.032
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The structural magnetic and magneto-transport properties of double perovskite system Ba2-xSrxFeMoO6 ( 0 <= x <= 1.0) prepared in bulk polycrystalline form are reported in this paper. X-ray diffraction analysis showed that samples are single phase and the lattice constants decreases with increase in the Sr content. The degree of Fe-Mo ordering has been found decreasing in the series with an increase in the Sr content. Parent compound Ba2FeMoO6 exhibits saturation magnetic moment value of 3.54 mu(B)/f.u. at 85 K in a magnetic field of 6000 Oe. Temperature dependence of resistivity shows metallic behavior for all the samples. The magneto-resistance (MR) of the compound with x = 0.4 is higher than that of the other samples. At room temperature this system shows a saturation magnetization value of 1.73 mu(B)/f.u. and MR value of 7.08% (1T). The observed variations in the structural and magnetic properties are attributed to the change of chemical pressure due to the substitution of Sr in place of Ba. The effect of antisite disorder (ASD) defects on magneto-transport properties is studied in more detail. (c) 2009 Elsevier B.V. All rights reserved.
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页码：2239 / 2244
页数：6
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