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Electronic structure, optical and magnetic properties of Co2FeGe Heusler alloy films
KTH, School of Engineering Sciences (SCI), Applied Physics, Nanostructure Physics.
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2012 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 112, no 6, 063909- p.Article in journal (Refereed) Published
Abstract [en]

Optical properties of ferromagnetic half-metallic full-Heusler Co2FeGe alloy are investigated experimentally and theoretically. Co2FeGe thin films were obtained by DC magnetron sputtering and show the saturation magnetization at T = 10 K of m approximate to 5.6 mu(B)/f.u:, close to the value predicted by the Slater-Pauling rule. First-principles calculations of the electronic structure and the dielectric tensor are performed using the full-potential linearized-augmented-plane-wave method in the generalized gradient approximation (GGA) and GGA + U approximation. The measured interband optical conductivity spectrum for the alloy exhibits a strong absorption band in the 1-4 eV energy range with pronounced fine structure, which agrees well with the calculated half-metallic spectrum of the system, suggesting a near perfect spin-polarization in the material.

Place, publisher, year, edition, pages
2012. Vol. 112, no 6, 063909- p.
Keyword [en]
Absorption spectroscopy, Calculations, Electronic structure, Magnetic properties, Optical conductivity, Saturation magnetization, Strontium compounds
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-104703DOI: 10.1063/1.4752870ISI: 000309423200081Scopus ID: 2-s2.0-84867091228OAI: oai:DiVA.org:kth-104703DiVA: diva2:567253
Funder
EU, FP7, Seventh Framework Programme
Note

QC 20121112

Available from: 2012-11-12 Created: 2012-11-09 Last updated: 2017-12-07Bibliographically approved

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Korenivski, Vladislav

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