2003/11/13 by L. J. Singh, Z. H. Barber, Y. Miyoshi +3 · 2 citations
Materials Science · Physics and Astronomy · #Advanced Thermoelectric Materials and Devices #Heusler alloys: electronic and magnetic properties #Magnetic properties of thin films #cond-mat.mtrl-sci
paper · pdf · doi:10.1063/1.1690868
15 pages, 4 figures
arxiv created 2003/11/13 · openalex publication_date 2004/03/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Thin films of Co2MnSi have been grown on a-plane sapphire substrates from three elemental targets by dc magnetron cosputtering. These films are single phase, have a strong (110) texture, and a saturation magnetization of 4.95μB/formula unit at 10 K. Films grown at the highest substrate temperature of 715 K showed the lowest resistivity (47 μΩ cm at 4.2 K) and the lowest coercivity (18 Oe). The spin polarization of the transport current was found to be of the order of 54% as determined by point contact Andreev reflection spectroscopy. A decrease in saturation magnetization with a decrease in film thickness and different transport behavior in thinner films indicate graded disorder in these films grown on nonlattice matched substrates.