Magnetization and Magnetoresistance of Particulate Sr2FeMoO6 Samples Prepared via Sol-gel Route and Heat Treatment in H2/Ar Atmospheres / Nguyen, Phuc Duong
Tác giả : Nguyen, Phuc Duong
Nhà xuất bản : H. : ĐHQGHN
Năm xuất bản : 2016
Tùng thư :
Vol. 32;No. 4 (2016)
Chủ đề : 1. antisite disorder. 2. magnetization. 3. magnetoresistance. 4. sol-gel. 5. Sr2FeMoO6. 6. Article.
Thông tin chi tiết
Tóm tắt : | Double perovskite Sr2FeMoO6 samples were prepared via sol-gel route followed by heat treatment in reduce gas atmosphere of H2/Ar (10 vol.% H2) at 900–1100°C for 8 hours. All the samples contain the main phase Sr2FeMoO6 with tetragonal structure (space group I4/m) and a certain amount of secondary phase SrMoO4 with contents being dependent on annealing temperature. Magnetic properties of the samples were investigated by means of vibrating sample magnetometer (VSM) in temperature range 80–450 K and in magnetic fields of ± 10 kOe. Their magnetoresistance in applied fields of ± 10 kOe was also studied at room temperature. The magnetization data were discussed based on the influence of impurity phase and cation antisite disorder parameter. The magnetoresistance results were analyzed based on the models of spin–dependent electron scattering and electron tunneling through grain boundaries. |
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https://repository.vnu.edu.vn/handle/VNU_123/55493 |