Volume 78, Number 1, April 2007
Article Number 17006
Number of page(s) 6
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
Published online 22 March 2007
EPL, 78 (2007) 17006
DOI: 10.1209/0295-5075/78/17006

High-field magnetization measurements in Sr2CrReO6 double perovskite: Evidence for orbital contribution to the magnetization

J. M. Michalik1, 2, J. M. De Teresa1, C. Ritter3, J. Blasco1, D. Serrate1, M. R. Ibarra1, 4, C. Kapusta2, J. Freudenberger5 and N. Kozlova5

1  Instituto de Ciencia de los Materiales de Aragón, CSIC-Universidad de Zaragoza, Facultad de Ciencias - Zaragoza, 50009, Spain
2  Department of Solid State Physics, Faculty of Physics and Applied Computer Sciences, AGH University of Science and Technology - 30-059 Cracow, Poland
3  Institute Laue-Langevin - Grenoble Cedex, 38042, France
4  Instituto de Nanociencia de Aragón, Universidad de Zaragoza - Zaragoza, 50009, Spain
5  IFW Dresden, Institute for Metallic Materials - P.O. Box 270116, D-01171 Dresden, Germany

received 22 November 2006; accepted in final form 21 February 2007; published April 2007
published online 22 March 2007

We have synthesized a ${\rm Sr}_{2}{\rm CrReO}_{6}$ double perovskite sample with the expected high Curie temperature $\approx 600\,{\rm K}$, which shows negligible impurity phases and $\approx 15{\%}$ Cr/Re structural antisite disorder as shown by X-ray and neutron diffraction. High-field magnetization measurements up to 47 T show that the saturation magnetization below room temperature is much higher than the one predicted by simple models that do not take into account the Re spin-orbit coupling. The crucial role of the large Re orbital moment in the physics of ${\rm Sr}_{2}{\rm CrReO}_{6}$ and related compound is highlighted.

75.30.Cr - Saturation moments and magnetic susceptibilities.
61.12.Ld - Neutron diffraction .
61.10.Nz - X-ray diffraction .

© Europhysics Letters Association 2007