Physics – Condensed Matter – Materials Science
Scientific paper
2005-09-21
Journ. Appl. Phys 99, 036110 (2006)
Physics
Condensed Matter
Materials Science
8 pages, 3 figures, submitted to Appl. Phys. Lett
Scientific paper
10.1063/1.2171782
We demonstrate tunnel magnetoresistance (TMR) junctions based on a tri layer system consisting of an epitaxial NiMnSb, aluminum oxide and CoFe tri layer. The junctions show a tunnelling magnetoresistance of Delta R/R of 8.7% at room temperature which increases to 14.7% at 4.2K. The layers show clear separate switching and a small ferromagnetic coupling. A uniaxial in plane anisotropy in the NiMnSb layer leads to different switching characteristics depending on the direction in which the magnetic field is applied, an effect which can be used for sensor applications.
Bach P.
Girgis E.
Gould Charles
Liu Jinjie
Molenkamp Laurens W.
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