Multiferroic double perovskites: Opportunities, Issues and Challenges

Details Multiferroic double perovskites: Opportunities, Issues and Challenges Multiferroic double perovskites: Opportunities, Issues and Challenges

2009-12-17

arxiv.org/abs/0912.3292v1

Physics

Condensed Matter

Materials Science

12 pages, 3 figures

Scientific paper

Despite the great technological and scientific importance, a well-controlled coupled behavior in magnetoelectric multiferroic materials at room temperature remains challenging. We demonstrate that the self-ordered A2BBO6 (e.g., A = La, B = Mn, and B = Ni) double perovskites provide a unique alternative opportunity to control and/or to induce such behavior in oxides. In this paper, we outline and discuss the various challenges and bottleneck issues related to this class of materials using La2NiMnO6 as a prototype. Details of the synthesis strategies, using pulsed laser deposition as a central tool, to obtain a meticulous control over cation ordering is illustrated. The possible impact of Ni/Mn cation ordering on the magnetic ground states, ferromagnetic transition temperature, phonon behavior, and spin-phonon coupling are presented. Our results are also compared with the current literature on related compounds.

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