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X-Ray Absorption and Magnetic Circular Dichroism Studies of Co _{2} FeAl in Magnetic Tunnel Junctions

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10 Author(s)
Ebke, D. ; Phys. Dept., Bielefeld Univ., Bielefeld, Germany ; Kugler, Z. ; Thomas, Patrick ; Schebaum, Oliver
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The bulk magnetic moment and the element specific magnetic moment of Co2FeAl thin films were examined as a function of annealing temperature by alternating gradient magnetometer (AGM) and X-ray absorption spectroscopy (XAS)/X-ray magnetic circular dichroism (XMCD), respectively. A high magnetic moment can be achieved for all annealing temperatures and the predicted bulk and interface magnetic moment of about 5 ¿B are reached via heating. We will also present tunnel magnetoresistance (TMR) values of up to 153% at room temperature and 260% at 13 K for MgO based magnetic tunnel junctions (MTJs) with Co2FeAl and Co-Fe electrodes.

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Magnetics, IEEE Transactions on  (Volume:46 ,  Issue: 6 )