TY  - JOUR
AU  - Stadler, Daniel
AU  - Mueller, David N.
AU  - Brede, Thomas
AU  - Duchoň, Tomáš
AU  - Fischer, Thomas
AU  - Sarkar, Anirban
AU  - Giesen, Margret
AU  - Schneider, Claus M.
AU  - Volkert, Cynthia A.
AU  - Mathur, Sanjay
TI  - Magnetic Field-Assisted Chemical Vapor Deposition of Iron Oxide Thin Films: Influence of Field–Matter Interactions on Phase Composition and Morphology
JO  - The journal of physical chemistry letters
VL  - 10
IS  - 20
SN  - 1948-7185
CY  - Washington, DC
PB  - ACS
M1  - FZJ-2019-05565
SP  - 6253 - 6259
PY  - 2019
AB  - Magnetic field-assisted CVD offers a direct pathway to manipulate the evolution of microstructure, phase composition, and magnetic properties of the as-prepared film. We report on the role of applied magnetic fields (0.5 T) during a cold-wall CVD deposition of iron oxide from [FeIII(OtBu)3]2 leading to higher crystallinity, larger particulates, and better out-of-plane magnetic anisotropy, if compared with zero-field depositions. Whereas selective formation of homogeneous magnetite films was observed for the field-assisted process, coexistence of hematite and amorphous iron(III) oxide was confirmed under zero-field conditions. Comparison of the coercive field (11 vs 60 mT) indicated lower defect concentration for the field-assisted process with nearly superparamagnetic behavior. X-ray photoemission electron microscopy (X-PEEM) in absorption mode at the O-K and Fe-L3,2 edges confirmed the selective formation of magnetite (field-assisted) and hematite (zero-field) with coexisting amorphous phases, respectively, emphasizing the importance of field–matter interactions in the phase-selective synthesis of magnetic thin films.
LB  - PUB:(DE-HGF)16
C6  - pmid:31500420
UR  - <Go to ISI:>//WOS:000492425100040
DO  - DOI:10.1021/acs.jpclett.9b02381
UR  - https://juser.fz-juelich.de/record/866412
ER  -