Three systems exhibiting ferromagnetic-antiferromagnetic coupling, Cc&oO, NiFe-NiFeMn, NiFe-Cr,O,, are studied using uniaxial thin films. A new property of such systems is found, i.e., a concentration of the hysteresis loops as a function of the number of cycles traced (iE). This contraction follows a 1 / 1 1 ; law for the first 50 cycles and is related to the rotational hysteresis. This phenomenon is att,qibuted to fluctuations in the ferromagneticantiferromagnetic coupling, which modify the magnetic interactions between differently coupled regions with each reversal. On a btudib s u p des couches minces Zt anisotropie uniaxiale trois s y s t h e s presentant les propriktbs caract6ristiques des couplages ferromagnktiques-antiferromagnbtiques,Co-COO, NiFe-NiFeMn, NiFe-Cr,O,. On a mis en evidence m e propribt-5 nouvelle de contraction des cycles d'hystkresis avec l'ordre n du cycle decrit. Cette contraction suit une loi en 1 / l / i pour les 50 premiers cycles et est libe Zt I'hystkrCsis de rotation. On attribue ce phenomhe B des fluctuations dans l'intensitk du couplage ferromagnbtique-antiferromagnbtique entrainant lors des diffbrents basculements, des modifications des interactions magnbtiques entre des regions Zt couplage diffbrent.

The Strategic Implementation Plan of the European Innovation Partnership on Active and Healthy Ageing (EIP on AHA) proposed six Action Groups. After almost three years of activity, many achievements have been obtained through commitments or collaborative work of the Action Groups. However, they have often worked in silos and, consequently, synergies between Action Groups have been proposed to strengthen the triple win of the EIP on AHA. The paper presents the methodology and current status of the Task Force on EIP on AHA synergies. Synergies are in line with the Action Groups' new Renovated Action Plan (2016-2018) to ensure that their future objectives are coherent and fully connected. The outcomes and impact of synergies are using the Monitoring and Assessment Framework for the EIP on AHA (MAFEIP). Eight proposals for synergies have been approved by the Task Force: Five cross-cutting synergies which can be used for all current and future synergies as they consider overarching domains (appropriate polypharmacy, citizen empowerment, teaching and coaching on AHA, deployment of synergies to EU regions, Responsible Research and Innovation), and three cross-cutting synergies focussing on current Action Group activities (falls, frailty, integrated care and chronic respiratory diseases).

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On a réalisé, à l'aide d'une balance de torsion, un traceur de cycle TBF destiné à enregistrer les cycles d'hystérésis de systèmes présentant des propriétés de couplages ferromagnétiques-antiferromagnétiques. On a pu observer sur trois systèmes Co-CoO, FeNi-FeNiMn, FeNi-Cr2O 3, que les cycles d'hystérésis décrits successivement se contractent. Cette nouvelle propriété de contraction des cycles d'hystérésis semble être liée à l'hystérésis de rotation et être caractéristique des couplages ferro-antiferromagnétiques

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