Understanding High Anisotropic Magnetism by Ultrathin Shell Layer Formation for Magnetically Hard–Soft Core–Shell Nanostructures

摘要: Magnetic core–shell nanostructures offer a viable solution for tunable magnetism via nanoscale exchange interactions in single-component unit. A typical synthetic approach monodisperse bimagnetic ferrite employs the seed-mediated growth method using heating-up process. Understanding magnetic interface formation and their is crucial; however, magnetical persistence of pristine core component during process unclear. Here, we elucidate enhancement mechanism anisotropy when hard–soft are formed with ultrathin shell layer. The effect on exhibits coordination change ligand chemisorption surface metal ions, which leads to substantial increase due enhanced spin–orbit couplings. We further demonstrate that selection precursors surfactants additional layer important. kin...