Tunable magnetic pole inversion in multiferroic BiFeO3–DyFeO3 solid solution. Issue 16 (11th April 2017)

• Record Type: Journal Article
• Authors: Wu, Jiangtao; Liao, Zuzhen; Sun, Ting; Su, Lun-Wei; Bi, Jian; Fan, Guangyin; Gao, Daojiang; Xie, Zhaoxiong; Ye, Zuo-Guang
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 16(2017)
• Page Start: 4063
• Page End: 4067
• Publication Date: 2017-04-11
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7tc00512a
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : We report an unusual magnetic pole inversion behaviour in multiferroic BiFeO3 – x DyFeO3 solid solution, which can be tuned by varying the concentration of the magnetic ion Dy in the solid solution. It is found that the temperature-induced magnetic pole inversion occurs in a wide composition range ( x = 0.14–0.90). Moreover, multiple magnetic pole inversions are observed in the solid solution compounds of high Dy-concentrations. Abstract : In ferromagnets, the magnetic moment can generally be reversed by applying a sufficiently high external magnetic field of opposite polarity. Temperature, on the other hand, is usually known to affect only the magnitude of a magnetic moment, rather than its sign or polarity (most magnets exhibit a monotonic increase in magnetization upon cooling below their magnetic phase transition temperature). As a result, temperature-induced magnetization reversal ( i.e. magnetic pole inversion) remains a very rare phenomenon which lacks proper understanding and explanation because of the extreme difficulties encountered in controlling the thermodynamics of magnetization of classical metal or metal oxide magnets. Herein, we report an unusual magnetic pole inversion behaviour in multiferroic (1 − x )BiFeO3 – x DyFeO3 solid solution (alloy), which can be tuned by varying the concentration of the magnetic ion Dy 3+ in the solid solution. It is found that the temperature-induced magnetic pole inversion occurs in a wide composition range ( x = 0.14–0.90). Moreover, for the first time in any ferrites, multiple magnetic pole inversions are observed in the solid solution compounds of high Dy 3+ -concentrations. Our results may provide a better understanding of the temperature- and composition-induced magnetic pole inversion and related phenomena and point to new potential applications for magnetic and multiferroic materials.