Characterization of Cr-rich Cr-Sb multilayer films: Syntheses of a new metastable phase using modulated elemental reactants

Journal Article · Thu Oct 15 00:00:00 EDT 2015 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/J.JSSC.2015.06.038· OSTI ID:22486815

Regus, Matthias ^[1]; Mankovsky, Sergiy; Polesya, Svitlana; Kuhn, Gerhard ^[2]; Ditto, Jeffrey ^[3]; Schürmann, Ulrich ^[4]; Jacquot, Alexandre; Bartholomé, Kilian ^[5]; Näther, Christian ^[1]; Winkler, Markus; König, Jan D.; Böttner, Harald ^[5]; Kienle, Lorenz ^[4]; Johnson, David C. ^[3]; Ebert, Hubert ^[2]; Bensch, Wolfgang ^[1]

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1. Institute of Inorganic Chemistry, Christian-Albrechts-University of Kiel, Max-Eyth-Str. 2, 24118 Kiel (Germany)
2. Department of Chemistry, Ludwig-Maximilians-University Munich, Butenandtstr. 5-13, D-81377 München (Germany)
3. Department of Chemistry and Materials Science Institute, University of Oregon, 373 Klamath Hall, Eugene, OR 97403 (United States)
4. Institute for Materials Science, Christian-Albrechts-University of Kiel, Kaiserstr. 2, 24118 Kiel (Germany)
5. Fraunhofer Institute for Physical Measurement Techniques IPM, Thermoelectric Systems, Heidenhofstraße 8, 79110 Freiburg (Germany)

The new metastable compound Cr{sub 1+x}Sb with x up to 0.6 has been prepared via a thin film approach using modulated elemental reactants and investigated by in-situ X-ray reflectivity, X-ray diffraction, differential scanning calorimetry, energy dispersive X-ray analysis as well as transmission electron microscopy and atomic force microscopy. The new Cr-rich antimonide crystallizes in a structure related to the Ni{sub 2}In-type structure, where the crystallographic position (1/3, 2/3, 3/4) is partially occupied by excess Cr. The elemental layers of the pristine material interdiffused significantly before Cr{sub 1+x}Sb crystallized. A change in the activation energy was observed for the diffusion process when crystal growth starts. First-principles electronic structure calculations provide insight into the structural stability, magnetic properties and resistivity of Cr{sub 1+x}Sb. - Graphical abstract: 1 amorphous multilayered film 2 interdiffused amorphous film 3 metastable crystalline phase 4 thermodynamic stable phase (and by-product). - Highlights: • Interdiffusion of amorphous Cr and Sb occurs before crystallization. • Crystallization of a new metastable phase Cr{sub 1.6}Sb in Ni{sub 2}In-type structure. • The new Cr-rich phase shows half-metallic behavior.

• OSTI ID: 22486815
• Journal Information: Journal of Solid State Chemistry, Vol. 230; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ATOMIC FORCE MICROSCOPY
CALORIMETRY
CRYSTAL GROWTH
CRYSTALLIZATION
DENSITY OF STATES
DIFFUSION
ELECTRONIC STRUCTURE
LAYERS
MAGNETIC PROPERTIES
PHASE STABILITY
REFLECTIVITY
SYNTHESIS
THIN FILMS
TRANSMISSION ELECTRON MICROSCOPY
X RADIATION
X-RAY DIFFRACTION