Affiliation:
1. Institut für Experimentalphysik Freie Universität Berlin Arnimallee 14 14195 Berlin Germany
2. Group of Permanent Magnets and Applications IMDEA Nanoscience 28049 Madrid Spain
3. Faculty of Science Department of Physics Helwan University 17119 Cairo Egypt
4. Department of Physics Kohat University of Science and Technology Kohat 26000 Khyber Pakhtunkhwa Pakistan
Abstract
Single‐crystalline antiferromagnetic artificially layered [Ni/Mn] films of different thicknesses, covered by ferromagnetic Co layers, are deposited on . Their structural and magnetic properties are characterized by low‐energy electron diffraction (LEED) and magneto‐optical Kerr effect, respectively, and compared with disordered alloy films with the same Ni/Mn ratio and the same film thickness. LEED intensity‐versus‐energy curves show that the perpendicular interatomic lattice distance is decreased in the artificially layered [Ni/Mn] samples in comparison to the disordered alloy films. At the same time, the artificially layered [Ni/Mn] films exhibit higher coercivity and exchange bias of the adjacent Co layer compared to those of . This is discussed as a consequence of the different interatomic lattice distance, presumably caused by an ordered buckling in the artificially layered [Ni/Mn] samples, leading to a stronger interlayer exchange coupling.
Funder
Dahlem Research School, Freie Universität Berlin
Subject
Condensed Matter Physics,Electronic, Optical and Magnetic Materials