Electronic structure of fully epitaxial Co{sub 2}TiSn thin films

Journal Article · Tue Feb 01 00:00:00 EST 2011 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.83.064412· OSTI ID:21538119

Meinert, Markus; Schmalhorst, Jan; Wulfmeier, Hendrik; Reiss, Guenter; Arenholz, Elke; Graf, Tanja; Felser, Claudia ^[1]

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1. Thin Films and Physics of Nanostructures, Department of Physics, Bielefeld University, D-33501 Bielefeld (Germany)

We report on the properties of thin films of the full Heusler compound Co{sub 2}TiSn prepared by dc magnetron co-sputtering. Fully epitaxial, stoichiometric films were obtained by deposition on MgO (001) substrates at substrate temperatures above 600 C. The films are well ordered in the L2{sub 1} structure, and the Curie temperature slightly exceeds the bulk value. They show a significant, isotropic magnetoresistance and the resistivity becomes strongly anomalous in the paramagnetic state. The films are weakly ferrimagnetic, with nearly 1 {mu}{sub B} on the Co atoms, and a small antiparallel Ti moment, in agreement with theoretical expectations. From comparison of x-ray absorption spectra on the Co L{sub 3,2} edges, including circular and linear magnetic dichroism, with ab initio calculations of the x-ray absorption and circular dichroism spectra we infer that the electronic structure of Co{sub 2}TiSn has essentially nonlocalized character. Spectral features that have not been explained in detail before are explained here in terms of the final-state band structure.

• OSTI ID: 21538119
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 83, Issue 6; Other Information: DOI: 10.1103/PhysRevB.83.064412; (c) 2011 American Institute of Physics; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
COBALT COMPOUNDS
COMPARATIVE EVALUATIONS
CURIE POINT
DEPOSITION
ELECTRONIC STRUCTURE
EPITAXY
HEUSLER ALLOYS
MAGNESIUM OXIDES
MAGNETORESISTANCE
MAGNETRONS
PARAMAGNETISM
SPUTTERING
STOICHIOMETRY
TEMPERATURE RANGE 0400-1000 K
THIN FILMS
TIN COMPOUNDS
TITANIUM COMPOUNDS
X RADIATION
X-RAY SPECTRA
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
ALUMINIUM ALLOYS
CHALCOGENIDES
COPPER ALLOYS
COPPER BASE ALLOYS
CORROSION RESISTANT ALLOYS
CRYSTAL GROWTH METHODS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELECTRON TUBES
ELECTRONIC EQUIPMENT
EQUIPMENT
EVALUATION
FILMS
IONIZING RADIATIONS
MAGNESIUM COMPOUNDS
MAGNETISM
MANGANESE ALLOYS
MICROWAVE EQUIPMENT
MICROWAVE TUBES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
SORPTION
SPECTRA
TEMPERATURE RANGE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT ALLOYS
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE