Magnetic coupling in epitaxial TM/MgO/Fe(001) (TM = FeCo, Fe/Co, Fe) macroscopic and microscopic trilayers

被引：7
作者：
Boubeta, CM
de Teresa, JM
Costa-Krämer, JL
Anguita, J
Serrate, D
Arnaudas, JI
Ibarra, MR
Cebollada, A
Briones, F
机构：
[1] CSIC, CNM, Inst Microelect Madrid, Madrid 28760, Spain
[2] Univ Zaragoza, Fac Ciencias, CSIC, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain
来源：
JOURNAL OF APPLIED PHYSICS | 2003年 / 94卷 / 06期
关键词：
D O I：
10.1063/1.1598280
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Multilayered TM/MgO/Fe (001) heterostructures (TM: FeCo, Co/Fe, and Fe) are grown epitaxially, to study the dependence of the magnetic coupling between the two ferromagnetic electrodes on the insulating MgO barrier width and the lateral dimensions of the structures. The crystal quality is investigated by reflection high-energy electron diffraction in situ at different growth stages of the TM/MgO/Fe(001) heterostructures. Magnetic characterization by superconducting quantum interference device magnetometry (macroscopic structures) and transverse Kerr effect (microscopic structures) shows clearly independent switching of top and bottom electrodes at large (above 20 Angstrom) spacer thicknesses for macroscopic films. This independent switching is also observed on patterned structures. For very thin barriers, decreasing the size of the elements in patterned arrays decreases the number of junctions coupled via pinholes. (C) 2003 American Institute of Physics.
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页码：4006 / 4012
页数：7
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