Synthesis and Magnetic Properties of Single-Crystalline Mn/Fe-Doped and Co-doped ZnS Nanowires and Nanobelts

Abstract

ZnS nanowires and nanobelts doped with Mn and Fe were synthesized by a chemical vapor transport method. The Mn/Fe-doped and co-doped ZnS nanostructures were grown on Au-coated Si substrates. The key to this synthetic process of co-doping lies in the use of metal chloride as a metal carrier. Crystal structure and chemical compositional analyses by transmission electron microscopy (TEM) indicate that the nanowires and nanobelts are single-crystalline and uniformly doped with dopants. Strong emission bands were found from photoluminescence (PL) spectra of Mn/Fe-doped and co-doped ZnS nanowires. The magnetic property measurements from the nanostructure ensemble show that the Curie temperature is above room temperature. The synthesized Mn/Fe-doped and co-doped ZnS nanostructures can be employed in the fabrication of nanoscale magnetic and optical devices.

Symmetry and electronic states of Mn2+ in ZnS nanowires with mixed hexagonal and cubic stacking

“…9 Multiple efforts have been focused on the fabrication of the ZnS: Mn 2+ nanowires using various techniques. 6,10 Nevertheless, the dimensions of most of these one-dimensional ͑1D͒ nanostructures are typically larger than the exciton Bohr radius in bulk ZnS, which makes the quantum confinement effects rarely observable. Since the optical and magnetic properties of Mn 2+ in DMS essentially rely on their actually occupied symmetry sites and the electronic structures in the host materials, ESR has been employed as an atomic probe to study the local crystal field effects and symmetry around Mn 2+ impurities.…”

First principles calculations of magnetic, electronic and optical properties of (Mn–Fe) co-doped SrTiO3

“…Co-doping with two different 3d TM impurities is an effective route to raise the Curie temperature and achieve the ferromagnetism [14,15]. The above experiments and calculations motivate us to give a first principles calculation to investigate the effect of the Fe-Mn co-doping on the electronic, magnetic properties and optical properties of SrTiO 3 .…”

Controlled synthesis of Eu2+ and Eu3+ doped ZnS quantum dots and their photovoltaic and magnetic properties

“…Depending on the dopants and preparation methods, ZnS may show paramagnetic or ferromagnetic behavior. 10,[20][21][22][23][24][25] In Eu doped samples, the ferromagnetic behavior is attributed to the presence of Eu 2+ (S=7/2). Nevertheless, the origin of the ferromagnetic order in doped ZnS is still controversial and much has yet to be understood.…”