2011/01/31 by Markus Meinert, J. Schmalhorst, Jan-Michael Schmalhorst +2
Chemistry · Engineering · Materials Science · Physics and Astronomy · #Advanced Welding Techniques Analysis #Antiferromagnetism #Chemistry #Condensed matter physics #Crystallography #Ferrimagnetism #Ferromagnetism #Heusler alloys: electronic and magnetic properties #Heusler compound #MXene and MAX Phase Materials #Magnetic field #Magnetic moment #Magnetization #Materials science #Nanotechnology #Physics #Sputter deposition #Sputtering #Thin film #cond-mat.mtrl-sci
paper · pdf · doi:10.1088/0022-3727/44/21/215003
published as Meinert et al., J. Phys. D: Appl. Phys. 44, 215003 (2011) · 10 pages, 4 figures
arxiv created 2011/01/31 · openalex publication_date 2011/05/06 · arxiv updated 2011/07/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The quaternary full Heusler compound Mn 2− x Co x VAl with x = 1 is predicted to be a half-metallic antiferromagnet. Thin films of the quaternary compounds with x = 0–2 were prepared by dc and RF magnetron co-sputtering on heated MgO (0 0 1) substrates. The magnetic structure was examined by x-ray magnetic circular dichroism and the chemical disorder was characterized by x-ray diffraction. Ferrimagnetic coupling of V to Mn was observed for Mn 2 VAl ( x = 0). For x = 0.5, we also found ferrimagnetic order with V and Co antiparallel to Mn. The observed reduced magnetic moments are interpreted with the help of band structure calculations in the coherent potential approximation. Mn 2 VAl is very sensitive to disorder involving Mn, because nearest-neighbour Mn atoms couple antiferromagnetically. Co 2 VAl has B2 order and has reduced magnetization. In the cases with x ⩾ 0.9 conventional ferromagnetism was observed, closely related to the atomic disorder in these compounds.