Study on Room Temperature Ferromagnetic Behavior of Tb doped ZnO Nanoparticles

Abstract

The prospect of a new generation of electronic devices based on the fundamental quantum property of angular momentum, known as spin, has led to the rapidly developing field of spintronics. It is envisioned that these advanced devices will have significant advantages over traditional charge based electronics in properties such as speed, power consumption and long coherence times. Diluted magnetic semiconductors (DMS) are one of the most promising candidates for spintronic application are considered a promising system for exhibiting spintronic functionality. These materials are created by using molecular beam epitaxy (MBE) to incorporate into traditional semiconductors a quantity of transition metal atoms sufficient that ferromagnetism is exhibited.The Zn1-xTbxO with x≤0.05, nanoparticles were prepared by chemical co-precipitation method. The samples were characterized through x-ray diffractometer (XRD) for structural and phase analysis. The optical properties of synthesized Tb-doped ZnO nanoparticles were studied by UV-Visible spectroscopy. The magnetic studies were done by vibrational sample magnetometer (VSM). The pure ZnO nanoparticles show ferromagnetic behaviour and with doping of Tb, it changes to antiferromagnetic. The remnant magnetisation mr is 2.69x10-5 emu/g and coercive field is 2019.43 Oe observed for pure ZnO nanoparticles