Synthesis, characterization and magnetoresistance properties study of magnetite thin films by electroless plating in aqueous solution |
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Authors: | Jianrong Sun Zhiguang Wang Yuyu Wang Yabin Zhu Kongfang Wei Tielong Shen Fashen Li |
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Affiliation: | aInstitute of Modern Physics, Chinese Academy of Sciences, No.509, Nanchang Road, Lanzhou 730000, China;bKey Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China |
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Abstract: | Polycrystalline half-metallic Fe3O4 films with 1 μm in thickness were synthesized on glass substrates directly by electroless plating in aqueous solution at 90 °C without heat treatment. The films have single pure spinal phase structure and the well-crystallized columnar grains grow perpendicularly to the substrates, as revealed by XRD, XPS and SEM. At room temperature, the films exhibit negative magnetoresistance (MR) ratio of about −5.1%, which is ascribed to intergranular tunneling of spin polarized electrons of Fe3O4. The resistivity R of the films with 1 μm in thickness at room temperature is about 5.2 × 10−1 Ω cm. The cation distribution and the arrangement of the magnetic moments of the plated Fe3O4 ferrite thin films are different from that of the bulk materials, which is likely to be one of the reasons for the modification of R and MR properties. |
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Keywords: | Electroless plating Magnetoresistance Thin films Fe3O4 |
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