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Self‐organization of Fe clusters on mesoporous TiO 2 templates
Author(s) -
Ziegler Patrick,
Paul Neelima,
MüllerBuschbaum Peter,
Wiedemann Birgit,
Kreuzpaintner Wolfgang,
Jutimoosik Jaru,
Yimnirun Rattikorn,
Setzer Annette,
Esquinazi Pablo,
Böni Peter,
Paul Amitesh
Publication year - 2014
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s1600576714021049
Subject(s) - materials science , magnetization , mesoporous material , anatase , template , scattering , economies of agglomeration , plane (geometry) , porosity , nanotechnology , condensed matter physics , chemical engineering , optics , composite material , photocatalysis , magnetic field , chemistry , geometry , biochemistry , physics , mathematics , engineering , quantum mechanics , catalysis
Fe layers with thicknesses between 5 and 100 nm were sputtered on mesoporous nanostructured anatase TiO 2 templates. The morphology of these hybrid films was probed with grazing‐incidence small‐angle X‐ray scattering and X‐ray reflectivity, complemented with magnetic measurements. Three different stages of growth were found, which are characterized by different correlation lengths for each stage. The magnetic behavior correlates with the different growth regimes. At very small thicknesses the TiO 2 template is coated and a porous Fe film results, with in‐plane and out‐of‐plane magnetization components. With increasing thickness, agglomeration of Fe occurs and the magnetization gradually turns mostly in plane. At large thicknesses, the iron grows independently of the template and the magnetization is predominantly in plane with a bulk‐like characteristic.