Session Z29: Magnetostructural Effects and General Magnetism

11:15 AM–1:27 PM, Friday, March 20, 2009
Room: 333

Sponsoring Unit: GMAG
Chair: Sara Majetich, Carnegie Mellon University

Abstract ID: BAPS.2009.MAR.Z29.9

Abstract: Z29.00009 : Self-energy of half-metallic ferromagnet Mn$_5$Ge$_3$ calculated from infrared spectroscopy data

12:51 PM–1:03 PM

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Authors:

S.V. Dordevic
(The University of Akron)

N. Stojilovic
(John Carroll University)

L.W. Kohlman
(The University of Akron)

C. Petrovic
(Brookhaven National Laboratory)

We will report the results of our infrared and optical spectroscopy study of a half-metallic ferromagnet Mn$_5$Ge$_3$. This compound is currently being investigated as potential injector of spin polarized currents into germanium. Infrared measurements have been performed over a broad frequency (30 - 50000~cm$^{-1}$) and temperature (10 - 300 K) range. From the complex optical conductivity $\sigma(\omega)$ we extract the electron self-energy $\Sigma(\omega)$. The calculation of $\Sigma (\omega)$ is based on novel numerical technique which uses Levenberg--Marquardt algorithm for solution of systems of non- linear equations. Obtained self-energy provides a new insight into electron correlations in Mn$_5$Ge$_3$.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2009.MAR.Z29.9