Effect of Corona Treatment on Magnetic Properties of Nanoscaled Multiferroic Films BiFeO₃, (BiLa)FeO₃ and (BiNd)FeO₃

Abstract:

Multiferroic films of BiFeO₃, (BiLa)FeO₃ and (BiNd)FeO₃ with various concentration of ions of Bi, La and Nd in dodecahedral sublattice utilising were fabricated on monocrystalline substrates of (001) SrTiO₃, (100) MgO and (100) Al₂O₃ by a number of technological methods: rf sputtering, vacuum laser ablation and metal-organic chemical vapor deposition (MOCVD). The film thickness varied in the range of 30-300 nm. The magnetic and magnetoelectric properties of the obtained films were investigated. The saturation magnetization of BiFeO₃ was about 9 emu/cm³ which is typical of strained films of this composition. Doping BiFeO₃ films by rear earth ions La (Nd) increases both the magnetisation saturation and Neel temperature, as well as magnetoelectric effects, which is explained by increase in magnetic crystal anisotropy and suppression of spatially modulated magnetic structure. It was demonstrated that the corona discharge treatment resulted in a substantial growth of the magnetisation saturation up to 35% whereas the changes in the Neel temperature were not noticible. This is explained by the induced electret state and giant magnetoelectric effect.

• Periodical: Solid State Phenomena (Volumes 233-234)
• Pages: 388-391
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.233-234.388
• Online since: July 2015
• Authors: V.G. Kostishyn, Nikolay N. Krupa, Larissa V. Panina, Vitaliy V. Nevdacha, D.N. Chitanov*, V.M. Truhan, N.A. Yudanov
• Keywords: Bismuth Ferrite, Magnetocapacitance, Magnetoelectric Effect, Multiferroics, Spatial Modulated Magnetic Structure

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