Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 67: Poster 4

MA 67.16: Poster

Freitag, 24. März 2017, 09:30–13:00, P2-OG3

Growth, structural characterisation and magnetotransport measurements in Mn3Ir thin-films — •James M Taylor1,2, Edouard Lesne1, Fasil Kidane Dejene1, Claudia Felser2, and Stuart S P Parkin11Max Planck Institute for Microstructure Physics, D-06120 Halle, Germany — 2Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany

Mn3Ir antiferromagnetic thin-films, previously utilized to exchange pin ferromagnetic layers in spin valve devices, have recently attracted renewed attention for applications in spintronic devices due to theoretical predictions of a large Berry curvature driven anomalous Hall effect and the observation of a facet-dependent spin Hall effect. Large spin Hall angles of up to θSH = 0.2 have been measured. Here we report the growth of highly-textured thin-films of Mn3Ir and their structural characterisation. Techniques such as X-ray diffraction and atomic force microscopy demonstrate films grown in both (001) and (111) orientations with roughnesses of less than 1nm. Antiferromagnetic properties of the films were studied using SQUID magnetometry and X-ray magnetic circular dichroism, as well as exchange biasing to adjacent NiFe ferromagnetic layers. Large values of exchange bias field were obtained, up to HEx = 306 Oe, demonstrating the antiferromagnetic quality of the films. We extended our investigation to study electrical transport in lithographically patterned Mn3Ir thin-films, including magnetotransport and microwave-frequency measurements.

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