High saturation magnetization, low coercivity and fine YIG nanoparticles prepared by modifying co-precipitation method

Abstract

Nanoparticles with their specific properties newly have drawn a great deal of attention of researchers [1-3]Yttrium iron Garnet magnetic nanoparticles (YIG-NPs) are promising materials with novel applications in microwave, spintronics, magnonics, and magneto-optical devices.However, achieving stable and remarkable magnetic YIG-NPs has been remaining as a great challenge. In this paper, synthesized YIG-NPs by modifying co-precipitation (MCP) method is reported. Structural and magnetic properties of final products are compared to those of the materials prepared by citrate-nitrate (CN) method. Smaller crystals and particle size have been found by MCP method comparing to that of synthesized by CN method. Using a relatively low annealing temperatures for both sets of samples (~700 °C), the final YIG samples prepared by MCP method show more structural purity than those made by CN method. Higher saturation magnetization (M s ) and lower coercivity (H c ) are observed in MCP YIG sample (23.23 emu/g and 30.1 Oe) than the CN prepared YIG sample (16.43 emu/g and 44.95 Oe). The Curie temperature is measured to be 569 °C for the MCP YIG sample determined from set of M s measurement at different temperatures ranging from 80-600 K. These findings lead to significant improvement in quality of synthesized (synthetic methods) of YIG-NPs.

Effect of YIG nanoparticle size and clustering in proximity-induced magnetism in graphene/YIG composite probed with magnetoimpedance sensors: Towards improved functionality, sensitivity and proximity detection

“…We can observe some small aggregations, which are composed of primary particles with the size distribution of 10-20 nm, matches the result of DLS measurement. Figure 1b describes in accordance with the calculated values for crystal size by the Scherrer's equation, [42] the mean diameter of YIG-MNPs prepared by MCP is 17 nm, which agrees with the values calculated from x-ray diffraction (XRD), that we recently reported in ref [41]. Figure 4b shows the hysteresis loops recorded at room temperature for both samples.…”

“…Finally, the solution precursor heated to dry and annealed to 700 °C for 2 h. Details of the MCP method is well-discussed in our recent work. [41]…”

Recent progress of magnetic nanoparticles in biomedical applications: A review

“…[ 19 ] There are different “bottom‐up” approaches reported in the literature. [ 20–22 ] Of them, most reported methods are co‐precipitation, [ 23–27 ] hydrothermal method, [ 28–31 ] thermal decomposition method, [ 32–39 ] and polyol method. [ 40–43 ] Other methods include flow injection technique, microwave‐assisted, solvothermal, sol–gel, sonochemical, chemical vapor deposition, physical vapor deposition, electrodeposition, combustion, laser pyrolysis, preparation within micelles, carbon ARC, microemulsion.…”

Heat generation in the AC magnetic field of fine Y₃Fe₅O₁₂ powder materials prepared by modifying co-precipitation synthesis

“…Hosseinzadeh et al reported that this crystallization occurs at a lower temperature, which can occur due to the usage of DMF as a solvent. 17) DMF and citric acid help bring the yttrium and iron cations closer to each other. Therefore, the crystallization of the oxide phase requires a much lower amount of energy in the system, which assists in the formation of crystalline structures at lower temperatures.…”

“…In this study, we attempted to synthesize YIG ferrite nanoparticles prepared by a modified co-precipitation method that investigated the work of Hosseinzadeh et al to clarify the heat generation behavior of fine YIG powders in an AC magnetic field. 17)…”