Anomalously large magnetic moment in nanocrystalline Co0.3Zn0.7Fe2O4 thin films. (17th October 2017)

• Record Type: Journal Article
• Authors: Prabhu, R; Sahu, B N; Venkataramani, N; Prasad, Shiva; Krishnan, R
• Is Part Of: Journal of physics communications. Volume 1:Number 3(2017)
• Publication Date: 2017-10-17
• Subjects: thin films -- Co–Zn ferrite -- pulsed laser deposition -- magnetization -- cation distribution; Physics -- Periodicals; 530.05
• DOI: 10.1088/2399-6528/aa8bf9
• Languages: English
• ISSNs: 2399-6528

Abstract

Abstract: Co0.3 Zn0.7 Fe2 O4 nanocrystalline thin films were deposited by pulsed laser ablation technique on amorphous quartz substrate. These films were as deposited at different substrate temperatures ( T S ) varying from room temperature (RT) to 750 °C. The RT deposited films were ex situ annealed at annealing temperatures ( T A ) ranging from 150 °C to 750 °C. The magnetic properties of the films were observed to depend on T A and T S . A spontaneous magnetization (4 π M S ) value higher than that of the bulk was observed in the as deposited film at T S = 750 °C. This film also showed a higher Curie temperature than bulk. These results were explained based on the grain growth and cation distribution in thin films.