Berlin 2012 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 27: Half-metals and Oxides (jointly with TT)

MA 27.7: Vortrag

Mittwoch, 28. März 2012, 11:15–11:30, EB 202

Magnetic and Electrical Properties of the possibly Antiferromagnetic Half-metal Double Perovskite La2CrWO6 — •Mehran Vafaee Khanjani, Philipp Komissinskiy, Mehrdad Baghaie Yazdi, Anastasiya Kolchynska, and Lambert Alff — Institute for Materials Science, Technische Universität Darmstadt, 64287 Darmstadt, Germany

The combination of a magnetic ion (B-site) and a non-magnetic ion (B’-site) in double perovskites (A2BB’O6) can lead to an induced magnetic moment at the non-magnetic site [1-3]. Therefore, double perovskites are hot candidates in the search for compensated antiferromagnetic half-metals (AFM-HMs) which are considered to be useful for spintronics, supplying on the one hand, fully spin-polarized electrons, and on the other hand due to the antiferromagnetic configuration, they are magnetically stable. Following band structure calculations [4] and a simple ionic picture, La2CrWO6 is an AFM-HM candidate. However, as bulk material this compound is thermodynamically unstable. One way of synthesizing such a material is a thin film approach forcing W into a very unusual W3+ state. To our knowledge, we have synthesized for the first time La2CrWO6 by pulsed laser deposition. Crystal structure, magnetic and electrical properties are presented. The Authors would like to thank the DFG GK 1035.

[1] K. L. Kobayashi et al, Nature 395, 677 (1998). [2] Y. Krockenberger et al, Phys. Rev. B 75, 020404(R) (2007). [3] A. Winkler et al, New J. Phys. 11, 073047 (2009). [4] V. Pardo et al, Phys Rev B 80, 054415 (2009).

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2012 > Berlin