Antiferromagnetic interlayer exchange coupling in epitaxial Fe/MgO/Fe trilayers with MgO barriers as thin as single monolayers

被引：12
|
作者：
Koziol-Rachwal, A. [1 ]
Slezak, T. [1 ]
Slezak, M. [1 ]
Matlak, K. [1 ]
Mlynczak, E. [2 ]
Spiridis, N. [2 ]
Korecki, J. [1 ,2 ]
机构：
[1] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, PL-30059 Krakow, Poland
[2] Polish Acad Sci, Jerzy Haber Inst Catalysis & Surface Chem, PL-30239 Krakow, Poland
来源：
JOURNAL OF APPLIED PHYSICS | 2014年 / 115卷 / 10期
关键词：
MAGNETIC TUNNEL-JUNCTIONS; MAGNETORESISTANCE;
D O I：
10.1063/1.4867745
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Comparative studies of the magnetic properties of epitaxial Fe/MgO/Fe trilayers, which were directly grown on an MgO(001) crystal and a homoepitaxial MgO buffer layer, were performed to examine the interlayer exchange coupling as a function of the MgO spacer thickness. Measurements of the magneto-optic Kerr effect at room temperature demonstrated that there was a strong antiferromagnetic coupling (AFC) between the Fe layers, which was mediated by the insulating MgO barrier. A measurable AFC was found in a range of MgO thickness (d(MgO)) from a single monolayer (2 angstrom) to 6 angstrom, which had a maximum strength of -1.15 ergs/cm(2) at d(MgO) = 2.7 angstrom for the Fe/MgO/Fe trilayers that were prepared on the buffered sample and was notably weaker for the trilayers that were prepared directly on the MgO(001). (C) 2014 AIP Publishing LLC.
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页数：6
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