Structural and multiferroic properties of epitaxial γ-Fe2O3-BiFeO3/Bi3.25La0.75Ti3O12 composite bi-layers

被引：14
作者：
Gautreau, Olivier [1 ]
Harnagea, Catalin [1 ]
Gunawan, Lina [2 ]
Botton, Gianluigi A. [2 ]
Normandin, Francois [3 ]
Veres, Teodor [3 ]
Pintilie, Lucian [4 ]
Alexe, Marin [4 ]
Pignolet, Alain [1 ]
机构：
[1] INRS Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada
[2] McMaster Univ, Brockhouse Inst Mat Res, Hamilton, ON L8S 4M1, Canada
[3] Natl Res Council Canada, IMI, Boucherville, PQ J4B 6Y4, Canada
[4] Max Planck Inst Microstruct Phys, D-06120 Halle, Germany
来源：
JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2008年 / 41卷 / 11期
关键词：
D O I：
10.1088/0022-3727/41/11/112002
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Multiferroic properties of gamma-Fe(2)O(3)-BiFeO(3)/Bi(3.25)La(0.75)Ti(3)O(12) epitaxial composite bi-layers grown on SrRuO(3)/SrTiO(3)(1 1 1) are compared with the properties of single phase BiFeO(3) and Bi(3.25)La(0.75)Ti(3)O(12) thin films. The composite bi-layers show well-saturated hysteresis loops with a low coercive field, a high fatigue resistance and high saturation magnetization. The insulating Bi(3.25)La(0.75)Ti(3)O(12) underlayer reduces significantly both the leakage current and the coercive field of the heterostructure (200 kV cm(-1)) at the expense of a lower polarization (20 mu C cm(-2)), while the epitaxial gamma-Fe(2)O(3) secondary phase that develops within the relaxed epitaxial BiFeO(3) matrix allowed for a high saturation magnetization.
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页数：6
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