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Enhanced Exchange And Reduced Magnetization of Gd in an Fe/Gd/Fe Trilayer
Romera Rabasa, Miguel and Muñoz, Manuel and Maicas Ramos, Marco Cesar and Michalik, J.M. and Teresa, Jose María de and Magén, C. and Prieto Martin, Jose Luis
Enhanced Exchange And Reduced Magnetization of Gd in an Fe/Gd/Fe Trilayer.
"Physical review", v. 84
The exchange interaction of Gd adjacent to Fe has been characterized by transport measurements on a double spin valve with a Fe/Gd/Fe trilayer as the middle layer. Our measurements show that the ferromagnetism of the Gd is enhanced by the presence of the Fe, and it remains ferromagnetic over its Curie temperature up to a thickness no smaller than 1 nm adjacent to the Fe. This thickness is more than double what has been reported before. Additionally, the saturation magnetization of the thin Gd layer sandwiched in Fe was found to be half of its bulk value. This reduced magnetization does not seem to be related to the proximity of Fe but rather to the incomplete saturation of Gd even for very high fields
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