TY - JOUR
T1 - Unveiling room temperature ferromagnetism in Zinc(II)-picoline complex modified TiO2 for spintronic applications
AU - Ayyakannu Sundaram, Ganeshraja
AU - Kuppusamy, Madhan
AU - Vadivel, Govindan
AU - Karthikeyan, Vaithinathan
AU - Emsaeng, Kanchanok
AU - Anbalagan, Krishnamoorthy
N1 - Publisher Copyright:
© 2023 Elsevier Inc.
PY - 2023/11
Y1 - 2023/11
N2 - Ferromagnetic materials have long been a focal point of research due to their potential applications in spintronics, data storage, and magnetic sensors. In recent years, metal oxide semiconductors have garnered attention as promising candidates for ferromagnetism, thanks to their tunable properties and compatibility with existing semiconductor technologies. In this study, we present an organo-metallic complex of [Zn(pic)2Cl2] grafted onto TiO2 core-shell nanoparticles (NPs), resulting in the generation of ferromagnetic properties at room temperature. Additionally, we explore the affinity of the organo-metallic complex over the surface of nanocrystalline anatase TiO2 through adsorption analyses in an aqueous solution. The powder X-ray diffraction patterns confirm the crystallization of the samples in a typical anatase structure, exhibiting phase purity without any impurity phases. UV–visible studies reveal a slight decrease in the band gap due to the formation of a core-shell structure (Zn-TiO2 complex). Photoluminescence spectroscopic study demonstrates the presence of oxygen defect-related emission peaks in Zn-modified TiO2 NPs. Remarkably, all Zn-TiO2 samples exhibit room temperature ferromagnetic behavior, prepared with various contact time intervals. The results unequivocally demonstrate that even a small amount of surface substitution of the Zn-based organometallic complex on the TiO2 surface significantly enhances the room temperature ferromagnetic ordering. Understanding the unique characteristics of this material is vital to unlocking its potential applications and exploring its capabilities in the field of spintronics.
AB - Ferromagnetic materials have long been a focal point of research due to their potential applications in spintronics, data storage, and magnetic sensors. In recent years, metal oxide semiconductors have garnered attention as promising candidates for ferromagnetism, thanks to their tunable properties and compatibility with existing semiconductor technologies. In this study, we present an organo-metallic complex of [Zn(pic)2Cl2] grafted onto TiO2 core-shell nanoparticles (NPs), resulting in the generation of ferromagnetic properties at room temperature. Additionally, we explore the affinity of the organo-metallic complex over the surface of nanocrystalline anatase TiO2 through adsorption analyses in an aqueous solution. The powder X-ray diffraction patterns confirm the crystallization of the samples in a typical anatase structure, exhibiting phase purity without any impurity phases. UV–visible studies reveal a slight decrease in the band gap due to the formation of a core-shell structure (Zn-TiO2 complex). Photoluminescence spectroscopic study demonstrates the presence of oxygen defect-related emission peaks in Zn-modified TiO2 NPs. Remarkably, all Zn-TiO2 samples exhibit room temperature ferromagnetic behavior, prepared with various contact time intervals. The results unequivocally demonstrate that even a small amount of surface substitution of the Zn-based organometallic complex on the TiO2 surface significantly enhances the room temperature ferromagnetic ordering. Understanding the unique characteristics of this material is vital to unlocking its potential applications and exploring its capabilities in the field of spintronics.
KW - Core-shell
KW - Room temperature ferromagnetism
KW - Spintronics
KW - Zinc(II)-Picoline complex
UR - http://www.scopus.com/inward/record.url?scp=85167812711&partnerID=8YFLogxK
U2 - 10.1016/j.jssc.2023.124278
DO - 10.1016/j.jssc.2023.124278
M3 - Article
AN - SCOPUS:85167812711
SN - 0022-4596
VL - 327
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
M1 - 124278
ER -