Magnetic and transport properties of the double perovskite Sr(2)FeRuO(6)

作者：Xia Weiwei; Zhou Qinlu; Xu Hongfang; Chen Liang; He Junhui^*

来源：Physica B: Condensed Matter , 2008, 403(13-16): 2189-2192.

DOI：10.1016/j.physb.2007.11.001

• doubleperovskite
• Sr(2)FeRuO(6)
• magnetic properties
• crystal structure
• transport properties

The doubleperovskite Sr(2)FeRuO(6) has been synthesized by the solid-state reaction method. X-ray diffraction and subsequent Rietveld refinement confirm that Sr(2)FeRuO(6) has the doubleperovskite structure with a triclinic cell (a = 5.508 angstrom, b = 5.474 angstrom, c = 7.861 angstrom, beta = 90.127) and space group 12/c. Due to the absence of the superlattice reflections (111) and (3 11), Fe and Ru atoms are found to occupy the center of the oxygen octahedron (B-sites) randomly. The magnetization curve at 300 K has been measured up to 90,000 Oe and reveals a very small magnetic susceptibility (chi = 2.99 x 10(-6) emu/g). Due to the disorder of Fe and Ru ions at the B-sites, Sr(2)FeRuO(6) is supposed to exhibit spin-glass behavior at low temperatures, instead of a long-range magnetic ordering state. The temperature dependence of the electrical resistivity has been measured at 0-70,000 Oe and indicates that Sr(2)FeRuO(6) is a typical semiconductor with an energy gap of about 0.23 eV. At 70,000 Oe and 115 K, the magnetoresistance (MR) is as large as about 25%.

• 出版日期2008-7-1
• 单位扬州大学