000199744 001__ 199744
000199744 005__ 20180913062534.0
000199744 0247_ $$2doi$$a10.1103/PhysRevB.89.245402
000199744 022__ $$a1550-235X
000199744 02470 $$2ISI$$a000336907100005
000199744 037__ $$aARTICLE
000199744 245__ $$aInterlayer exchange coupling in ordered Fe nanocluster arrays grown on Al2O3/Ni3Al(111)
000199744 260__ $$aCollege Pk$$bAmer Physical Soc$$c2014
000199744 269__ $$a2014
000199744 300__ $$a9
000199744 336__ $$aJournal Articles
000199744 520__ $$aWe have combined magneto-optical Kerr effect, scanning tunneling microscopy, and x-ray magnetic circular dichroism to study the magnetic properties and the morphology of Fe nanoparticles grown on 2 ML thick Al2O3/Ni3Al(111)-(root 67 x root 67)R12.2 degrees with and without Pd seeding. The Ni3Al(111) substrate is ferromagnetic and shows two transition temperatures. The first, T-C1 = 81 +/- 3 K, is attributed to a 20-30 nm thick slightly Ni enriched region; the second, T-C2 = 240 +/- 12 K, is attributed to a much thinner and more strongly Ni enriched near interface region that contains Ni clusters embedded in the alloy matrix. The magnetic properties of the Fe cluster superlattice are strongly influenced by the superexchange coupling between Fe clusters and the underlying Ni clusters in that near interface region. Since the Ni clusters are at different distances from the oxide/metal interface, this coupling oscillates between ferro-and antiferromagnetic such that the overall magnetic moment is not increased by the Fe clusters. Pd seeding does not influence the magnetic properties of the system. The intrinsic Fe cluster properties, such as Curie temperature and easy magnetization axis, are accessed for T > T-C2. We find out-of-plane easy magnetization axes and T-C approximate to 300 K for cluster sizes above 440 atoms.
000199744 700__ $$0242204$$aVlaic, S.$$g190267
000199744 700__ $$0245533$$aGragnaniello, L.$$g218229
000199744 700__ $$0240036$$aRusponi, S.$$g132653
000199744 700__ $$0242206$$aCavallin, A.$$g194473
000199744 700__ $$0245283$$aDonati, F.$$g212774
000199744 700__ $$0242207$$aDubout, Q.$$g166549
000199744 700__ $$aPiamonteze, C.
000199744 700__ $$0247284$$aDreiser, J.$$g234525
000199744 700__ $$aNolting, F.
000199744 700__ $$0240039$$aBrune, H.$$g104651
000199744 773__ $$j89$$k24$$tPhysical Review B
000199744 8564_ $$s1368850$$uhttps://infoscience.epfl.ch/record/199744/files/Vlaic_14_PRB.pdf$$yPublisher's version$$zPublisher's version
000199744 909C0 $$0252022$$pLNS$$xU10150
000199744 909CO $$ooai:infoscience.tind.io:199744$$pSB$$particle
000199744 917Z8 $$x219936
000199744 937__ $$aEPFL-ARTICLE-199744
000199744 973__ $$aEPFL$$rNON-REVIEWED$$sPUBLISHED
000199744 980__ $$aARTICLE