Room temperature ferromagnetism in chemically synthesized ZnO rods

TL;DR

This study demonstrates that pure ZnO rods synthesized via co-precipitation exhibit room temperature ferromagnetism, with structural analysis confirming their single-phase wurtzite structure and absence of oxygen vacancies.

Contribution

It provides evidence of room temperature ferromagnetism in pure ZnO rods without oxygen vacancies, advancing understanding of ZnO's magnetic properties.

Findings

ZnO rods are single-phase wurtzite structure.

Room temperature ferromagnetism observed in ZnO rods.

No oxygen vacancies detected in pure ZnO rods.

Abstract

We report structural and magnetic properties of pure ZnO rods using X-ray diffraction (XRD), magnetization hysteresis (M-H) loop and near edge x-ray fine structure spectroscopy (NEXAFS) study at O K edge. Sample of ZnO was prepared by co-precipitation method. XRD and selective area electron diffraction measurements infer that ZnO rods exhibit a single phase polycrystalline nature with wurtzite lattice. Field emission transmission electron microscopy, field emission scanning electron microscopy micrographs infers that ZnO have rod type microstructures with dimension 200 nm in diameter and 550 nm in length. M-H loop studies performed at room temperature display room temperature ferromagnetism in ZnO rods. NEXAFS study reflects absence of the oxygen vacancies in pure ZnO rods.