In this work, the magnetic properties of the Fe/NiO (1 0 0) interface at room temperature is investigated using non-linear magnetooptical Kerr effect. Nickel oxide is a promising material for technological applications due to its Neel temperature (525 K) occurring well above the room temperature. Non-linear Kerr rotation measurements have demonstrated to be an effective way to investigate a ferromagnetic/antiferromagnetic interface. The measurements here reported demonstrate that the magnetic properties of the studied interface strongly depend on the Fe layer thickness. In fact, a clear hysteresis loop is observed only for a thickness higher than 5 ML, whereas for the 2 NIL sample the hysteresis loop completely disappears. These results are in agreement with previous structural characterizations of the interface. (C) 2007 Elsevier B.V. All rights reserved.
Ferromagnetic-antiferromagnetic Fe/NiO (100) interface studied by non-linear Kerr effect
Colonna S;Ronci F;Cricenti A;Luches P;Valeri S;
2007
Abstract
In this work, the magnetic properties of the Fe/NiO (1 0 0) interface at room temperature is investigated using non-linear magnetooptical Kerr effect. Nickel oxide is a promising material for technological applications due to its Neel temperature (525 K) occurring well above the room temperature. Non-linear Kerr rotation measurements have demonstrated to be an effective way to investigate a ferromagnetic/antiferromagnetic interface. The measurements here reported demonstrate that the magnetic properties of the studied interface strongly depend on the Fe layer thickness. In fact, a clear hysteresis loop is observed only for a thickness higher than 5 ML, whereas for the 2 NIL sample the hysteresis loop completely disappears. These results are in agreement with previous structural characterizations of the interface. (C) 2007 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
