Magnetoelectric effect at the SrRuO3/BaTiO3 (001) interface: An ab initio study

被引：124
|
作者：
Niranjan, Manish K. [1 ,2 ]
Burton, J. D. [1 ,2 ]
Velev, J. P. [3 ]
Jaswal, S. S. [1 ,2 ]
Tsymbal, E. Y. [1 ,2 ]
机构：
[1] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA
[2] Univ Nebraska, Nebraska Ctr Mat & Nanosci, Lincoln, NE 68588 USA
[3] Univ Puerto Rico, Dept Phys, San Juan, PR 00931 USA
来源：
APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 05期
基金：
美国国家科学基金会;
关键词：
ab initio calculations; band model of magnetism; band structure; barium compounds; dielectric polarisation; ferroelectric materials; ferromagnetic materials; interface magnetism; magnetisation; magnetoelectric effects; spin polarised transport; strontium compounds; TUNNEL-JUNCTIONS; FERROMAGNETISM;
D O I：
10.1063/1.3193679
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Ferromagnet/ferroelectric interface materials have emerged as structures with strong magnetoelectric coupling that may exist due to unconventional physical mechanisms. Here we present a first-principles study of the magnetoelectric effect at the ferromagnet/ferroelectric SrRuO3/BaTiO3 (001) interface. We find that the exchange splitting of the spin-polarized band structure, and therefore the magnetization, at the interface can be altered substantially by reversal of the ferroelectric polarization in the BaTiO3. These magnetoelectric effects originate from the screening of polarization charges at the SrRuO3/BaTiO3 interface and are consistent with the Stoner model for itinerant magnetism.
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页数：3
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