Magnetic properties of NiFe2O4 thin films grown on La0.7Sr0.3MnO3-buffered Si substrate |
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| Affiliation: | 1. School of Physics & Optoelectronic Engineering, Guangdong University of Technology, Guangzhou Guangzhou Higher Education Mega Center 510006, PR China;2. Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, Xiangtan University, Xiangtan 411105, Hunan, China;3. Instrumental Analysis & Research Center, Sun Yat-sen University, Guangzhou 510275, PR China;1. Materials Science Lab. (1), Physics Department, Faculty of Science, Cairo University, Giza, Egypt;2. Basic Science Department, Thebes Higher Institute for Engineering, Maadi, Cairo, Egypt;1. Nanostech Laboratory, Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, 110016 New Delhi, India;2. Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstr. 400, 01328 Dresden, Germany;3. Department of Materials for Nanoelectronics, Chemnitz University of Technology, 09126 Chemnitz, Germany;4. Elettra-Sincrotrone Trieste S.C.p.A., s.s. 14 km 163.5, 34194 Basovizza Trieste, Italy;1. Laboratoire Charles Coulomb, UMR CNRS 5221, cc. 074, Place Eugène Bataillon, 34095 – Montpellier Cedex 05, France;2. Laboratoire Charles Coulomb, Université Montpellier 2, cc. 074, Place Eugène Bataillon, 34095 – Montpellier Cedex 05, France |
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| Abstract: | Nickel ferrite NiFe2O4 (NFO) thin films have been prepared on a Si substrate (NFO/Si) and La0.7Sr0.3MnO3 (LSMO)-coated Si (100) substrate (NFO/LSMO/Si) by RF magnetron sputtering. The microstructures and magnetic properties of the two films were systematically investigated. X-ray diffraction (XRD) and atomic force microscopy (AFM) revealed that highly (331)-oriented NFO films with a smooth surface were grown on the LSMO/Si substrate. The magnetization of the films was measured at room temperature. It showed a clear hysteresis loop in both samples, with the magnetic field applied in the plane. However, no hysteresis loop is seen with the magnetic field applied perpendicular to the film plane. This indicates the presence of an anisotropy favoring the orientation of the magnetization in the direction parallel to the film plane. A study of magnetization hysteresis loop measurements indicates that the LSMO buffer layer may improve the magnetic properties of NFO thin films, and that the saturation magnetization increases from 4.15 × 104 to 3.5 × 105 A/m. |
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