Anomalous transport properties of the half-metallic ferromagnets Co

2TiSi, Co

2TiGe and Co

2TiSn

by Joachim Barth, Gerhard H. Fecher, Benjamin Balke, Tanja Graf, Andrey Shkabko, Anke Weidenkaff, Peter Klaer, Michael Kallmayer, Hans-Joachim Elmers, Hideki

Yoshikawa, Shigenori Ueda, Keisuke Kobayashi, and Claudia Felser

Philosophical Transactions AVolume 369(1951):3588-3601

September 28, 2011

©2011 by The Royal Society

Spin-resolved electronic structure of Co2TiGe.

Joachim Barth et al. Phil. Trans. R. Soc. A 2011;369:3588-3601

©2011 by The Royal Society

Powder XRD of the Co2YZ compounds with Z=Si, Ge and Sn. The diffraction patterns are measured at room temperature with Mo-Kα radiation.

Joachim Barth et al. Phil. Trans. R. Soc. A 2011;369:3588-3601

©2011 by The Royal Society

Temperature dependence of the lattice parameter of (a) Co2TiGe (a0= 5.8069 Å) and (b) Co2TiSn (a0=6.0525 Å).

Joachim Barth et al. Phil. Trans. R. Soc. A 2011;369:3588-3601

©2011 by The Royal Society

SEM micrograph of Co2TiSi.

Joachim Barth et al. Phil. Trans. R. Soc. A 2011;369:3588-3601

©2011 by The Royal Society

Magnetization measurements of Co2TiZ.

Joachim Barth et al. Phil. Trans. R. Soc. A 2011;369:3588-3601

©2011 by The Royal Society

Photoemission and density of states of Co2TiZ (Z=Si, Ge and Sn).

Joachim Barth et al. Phil. Trans. R. Soc. A 2011;369:3588-3601

©2011 by The Royal Society

Measured temperature-dependent electrical resistivity ρ of Co2TiZ compounds with Z=Si, Ge or Sn (a).

Joachim Barth et al. Phil. Trans. R. Soc. A 2011;369:3588-3601

©2011 by The Royal Society

Measured Seebeck coefficient of Co2TiZ compounds with Z=Si, Ge or Sn. Squares with solid line, Co2TiSi; circles with solid line, Co2TiGe; triangles with solid line, Co2TiSn.

Joachim Barth et al. Phil. Trans. R. Soc. A 2011;369:3588-3601

©2011 by The Royal Society