Synthesis and Magnetic Properties of Single‐Crystals of MnFe₂O₄ Nanorods

Abstract

Single-crystals of MnFe 2 O 4 nanorods with an average diameter of 20 nm and length of 250 nm were synthesized by a hydrothermal process at 180°C after 12 h. High-resolution transmission electron microscopy (HRTEM) and electron diffraction (ED) analysis revealed that the nanorods grow along the [110] axis, which is one of the easy magnetization axes of the material MnFe 2 O 4 . It was found that the nanorods exhibited a saturation magnetization (Ms) of 68.02 emu/g, which is much higher than that of quasi-spherical particles of

Optimization of catalytic, surface and magnetic properties of nanocrystalline manganese ferrite

“…The corresponding squareness ratio (M r /M s ) was found to be 0.28. It was found that the as-prepared Mn ferrite particles exhibited a saturation magnetization greater than that of MnFe 2 O 4 , prepared by other approaches such as solid-state reaction method (M s = 36.7 emu/g), and coprecipitation process followed by annealing in vacuum at 400 8C (M s = 24.4 emu/g) [41]. (ii) The observed coercivities are very small for all the samples and they have been found to decrease with the decrease in the ratio between glycine and nitrates.…”

The Fabrication and Magnetic Properties of Ni Fibers Synthesized Under External Magnetic Fields

“…[13,17] Because of the shape-and sizedependent properties, one of the main challenges in this area is how to precisely control the shape and crystal structures of the 1D nanostructured Ni products, which is critical to the tailoring of the physical/chemical properties in a controllable way. [18][19][20] Unfortunately, previous studies on 1D nickel nanostructures mainly concentrated on the microstructures at a certain external magnetic field in a solvothermal or hydrothermal system, which is less competitive in terms of the facile and simple operation for the fabrication of the magnetic fibers with tunable morphology.…”

Simple Solid‐State Chemical Synthesis of ZnSnO3 Nanocubes and Their Application as Gas Sensors

“…[10][11][12][13] Current studies on CMO materials have been focused on zero-dimensional microparticles or nanoparticles, and little work has been devoted to 1D nanomaterials, which can be synthesized by various well-established techniques, including a chemical solution route, template synthesis, chemical vapor deposition, thermal evaporation, and a template-induced, citrate-based, sol-gel process. [14][15][16][17][18][19][20] To date, we have found nothing in the literature on the synthesis of cubic CMO nanomaterials. Furthermore, reported methods suffer from inherent drawbacks, such as the involvement of complex processes, rigorous conditions, or long reaction times.…”