Authors thank the DFG for funding via the SPP1239. Dr. Andriy Lotnyk is also thanked for fruitful discussions.
Structure and Composition of Magnetocaloric Ni–Mn–In–Co Thin Films on the Nanoscale—A TEM Study†
Article first published online: 7 MAY 2012
Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Engineering Materials
Volume 14, Issue 8, pages 710–715, August 2012
How to Cite
Erkartal, B., Duppel, V., Niemann, R., Schultz, L., Fähler, S., Schürmann, U. and Kienle, L. (2012), Structure and Composition of Magnetocaloric Ni–Mn–In–Co Thin Films on the Nanoscale—A TEM Study. Adv. Eng. Mater., 14: 710–715. doi: 10.1002/adem.201200072
- Issue published online: 6 AUG 2012
- Article first published online: 7 MAY 2012
- Manuscript Accepted: 10 APR 2012
- Manuscript Received: 20 FEB 2012
A complementary set of electron microscopy techniques is applied for the determination of structural and chemical segregation phenomena within a 300 nm thick metamagnetic Ni–Mn–In–Co thin film. The structure is predominantly composed of distinct modulated martensites of the 5M-, 6M-, 7M-, and 8M-type. Additionally these modulated structures exhibit twinning and stacking disordering. The nature of the disordering and the structural misfit at the twin interface were analyzed via high resolution micrographs. Next to an adhesion layer of Cr interdiffusion on the nanoscale was observed producing a penternary chemically and structurally homogeneous precipitate. The structure can be assigned to a twinned non-modulated pseudocubic model.