DocumentCode :
1497953
Title :
X-Ray Absorption and Magnetic Circular Dichroism 
FeAl in Magnetic Tunnel Junctions
Author :
Ebke, Daniel ; Kugler, Zoë ; Thomas, Patrick ; Schebaum, Oliver ; Schäfers, Markus ; Nissen, Dennis ; Schmalhorst, Jan ; Hütten, Andreas ; Arenholz, Elke ; Thomas, Andy
Author_Institution :
Phys. Dept., Bielefeld Univ., Bielefeld, Germany
Volume :
46
Issue :
6
fYear :
2010
fDate :
6/1/2010 12:00:00 AM
Firstpage :
1925
Lastpage :
1928
Abstract :
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.
Keywords :
X-ray absorption spectra; aluminium alloys; annealing; cobalt alloys; iron alloys; magnetic circular dichroism; magnetic moments; magnetic thin films; tunnelling magnetoresistance; Co2FeAl; TMR; X-magnetic circular dichroism; X-ray absorption spectroscopy; alternating gradient magnetometer; annealing temperature; bulk magnetic moment; electrodes; element specific magnetic moment; interface magnetic moment; magnetic tunnel junctions; temperature 293 K to 298 K; thin films; tunnelling magnetoresistance; Annealing; Electromagnetic wave absorption; Magnetic films; Magnetic moments; Magnetic tunneling; Magnetometers; Spectroscopy; Temperature; Tunneling magnetoresistance; X-ray imaging; Magnetic films; X-ray spectroscopy; magnetoresistance; thin films;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2010.2041049
Filename :
5467389
Link To Document :
