Magnetic Recording Materials

Hibst, H.; Schwab, E.

doi:10.1002/9783527603978.mst0041

Materials Science and Technology 2006

DOI: 10.1002/9783527603978.mst0041

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Magnetic Recording Materials

H. Hibst¹,

E. Schwab²

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Dependence of pH Variation on the Structural, Morphological, and Magnetic Properties of Sol-Gel Synthesized Strontium Ferrite Nanoparticles

Mustaffa¹,

Azis²,

SakinahSulaiman³

2019

Sol-Gel Method - Design and Synthesis of New Materials With Interesting Physical, Chemical and Biological Properties

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In this research work, an attempt of regulating the pH as a sol-gel modification parameter during preparation of SrFe 12 O 19 nanoparticles sintered at a low sintering temperature of 900 C has been presented. The relationship of varying pH (pH 1-14) on structural microstructures and magnetic behaviors of SrFe 12 O 19 nanoparticles was characterized by X-ray diffraction (XRD), field emission scanning microscope (FESEM), thermogravimetric analysis (TGA), Fourier-transform infrared (FTIR), and vibrating-sample magnetometer (VSM). The single-phase SrFe 2 O 19 with optimum magnetic properties can be obtained at pH 1 with a sintering temperature of 900 C. As pH values increase, the presence of impurity Fe 2 O 3 was observed. TGA data-varying pH shows that the total weight loss of most samples was at 30.44% which corresponds to the decomposition process. The IR spectra showed three main absorption bands in the range of 400-600 cm À1 corresponding to strontium hexaferrite. SEM micrographs exhibit a circular crystal type of strontium ferrite with an average crystal size in the range of 53-133 nm. A higher saturation magnetization M s , remanent magnetization M r , and hysteresis H c were recorded to have a large loop of 55.094 emu/g, 33.995 emu/g, and 5357.6 Oe, respectively, at pH 11, which make the synthesized materials useful for high-density recording media and permanent magnets.

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Dependence of pH Variation on the Structural, Morphological, and Magnetic Properties of Sol-Gel Synthesized Strontium Ferrite Nanoparticles

Mustaffa¹,

Azis²,

SakinahSulaiman³

2019

Sol-Gel Method - Design and Synthesis of New Materials With Interesting Physical, Chemical and Biological Properties

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Magnetic Recording Materials

Cited by 1 publication

References 181 publications

Dependence of pH Variation on the Structural, Morphological, and Magnetic Properties of Sol-Gel Synthesized Strontium Ferrite Nanoparticles

Dependence of pH Variation on the Structural, Morphological, and Magnetic Properties of Sol-Gel Synthesized Strontium Ferrite Nanoparticles

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