A radical approach to promote multiferroic coupling in double perovskites

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:321

Article; Proceedings Paper

Singh, M. P.^1,2  Truong, K. D.^1,2  Fournier, P.^1,2  Rauwel, P.³  Rauwel, E.⁴  Carignan, L. P.^5,6  Menard, D.^5,6 

[1] Univ Sherbrooke, Dept Phys, Sherbrooke, PQ J1K 2R1, Canada

[2] Univ Sherbrooke, RQMP, Sherbrooke, PQ J1K 2R1, Canada

[3] Univ Aveiro, CICECO, Dept Ceram & Glass Engn, P-3810193 Aveiro, Portugal

[4] Univ Aveiro, CICECO, Dept Chem, P-3810193 Aveiro, Portugal

[5] Ecole Polytech, Dept Genie Phys, Montreal, PQ H3C 3A7, Canada

[6] Ecole Polytech, RQMP, Montreal, PQ H3C 3A7, Canada

关键词: Double perovskite;    Multiferroics;    Property;    Structure;    Thin film;   

DOI  :  10.1016/j.jmmm.2009.02.003

来源: Elsevier

【 摘 要 】

Double perovskites provide a unique opportunity to induce and control multiferroic behaviours in oxide systems. The appealing possibility to design materials with a strong coupling between the magnetization and the polarization fields may be achieved in this family since these magnetic insulators can present structural self-ordering in the appropriate growth conditions. We have studied the functional properties of La2CoMnO6 and Bi2CoMnO6 epitaxial thin films grown by pulsed laser deposition. Cation-ordered La2CoMnO6 films display a magnetic Curie temperature of 250 K while cation-disordered Bi2CoMnO6 films present ferromagnetism up to similar to 800 K. Such high transition temperature for magnetic ordering can be further tuned by varying the strain in the films indicating an important contribution from the structural characteristics of the materials. Our approach might be generalized for other oxide systems. At this end, our results are compared with other multiferroic systems. The roles of various cations, their arrangements and structural effects are further discussed. (C) 2009 Elsevier B.V. All rights reserved.

【 授权许可】

Free