Tunable High-TC ferromagnetism in Sn4+-doped (InFe0.04)2O3 nanoparticles: a vital role of electron doping. (16th April 2017)

• Record Type: Journal Article
• Authors: Qaseem, S.; Naeem, M.; Rizwan Ali, S.; Maqbool, M.; Imran Ali, S.
• Is Part Of: Materials technology. Volume 32:Number 5(2017)
• Page Start: 327
• Page End: 333
• Publication Date: 2017-04-16
• Subjects: DMS -- nanoparticles -- electron doping -- magnetic property -- defect density; Materials -- Periodicals; Materials science -- Periodicals; Materials -- Technological innovations -- Periodicals; 620.1105
• DOI: 10.1080/10667857.2016.1217117
• Languages: English
• ISSNs: 1066-7857

Abstract

Abstract: Inspired by the ongoing development of multifunctional and hybrid nanomaterials for spintronics application, the structural, electronic and magnetic properties of FeSn co-doped In2 O3 nanoparticles have been studied. Effects of Sn as a tetravalent impurity in In1.96−x Fe0.04 Snx O nanoparticles on the room temperature ferromagnetism (RTFM) are investigated. Small concentration of Sn leads to an initially abrupt decrease in the magnetic moment from 0.78 emu g −1 (for x = 0) to 0.37 emu g −1 for (x = 0.005) beyond which it decreases gradually in a tunable manner to 0.23 emu gm −1 (for x = 0.025). The Sn-induced suppression of the ferromagnetic moment is attributed to the appearance of mixed valent states Fe 2+ /Fe 3+ and depletion of itinerant carriers from the system with the increase in Sn content. Additionally, Sn as an electron dopant plays a pivotal role to diminish the ferromagnetic stability in this system by destabilising the formation of local-bound magnetic polaron.