Regensburg 2013 – scientific programme
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DF: Fachverband Dielektrische Festkörper
DF 22: Poster II
DF 22.40: Poster
Friday, March 15, 2013, 10:30–13:30, Poster D
investigation of magnetic domain structure and domain wall in Co2Mn0.6Fe0.4Si — •tomohiro koyama1, phillip pirro1, thomas brächer1, thomas sebastian1, ikhtiar i2, yusuke ohdaira2, takahide kubota3, hiroshi naganuma2, mikihiko oogane2, yasuo ando2, and burkard hillebrands1 — 1Fachbereich Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany — 2Department of Applied Physics, Graduate School of Engineering, Tohoku University, 980-8579, Sendai, Japan — 3WPI Advanced Institute for Materials Research, Tohoku University, 980-8577, Sendai, Japan
The interaction between magnetic domain walls (DW) and spin waves is much attractive from the viewpoint of physical interests and applications. The full Heusler compound Co2Mn0.6Fe0.4Si (CMFS) is one of the suitable materials to investigate it because of its long decay length of spin waves. For the advance of the research, we have characterized domain structures and DWs in CMFS. The micro structures were fabricated from CMFS film with 30 nm thickness sputtered on MgO substrate by electron beam lithography and ion etching. The magnetic domain structure and DWs in CMFS were directly observed by using magnetic force microscopy. We found that in a square pad the Landau closure domain was formed by oscillatory reducing the external field to zero. In addition, the creation of a single DW in an L-shaped wire was performed. The effect of excited spin waves on these domain structures will be discussed. T.K. gratefully acknowledges the Alexander von Humboldt foundation for a postdoctoral fellowship.