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Spin dynamics in oriented ferromagnetic nanowires Ge |
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| Authors: | R. B. Morgunov A. I. Dmitriev Y. Tanimoto J. S. Kulkarni J. D. Holmes O. L. Kazakova |
| Affiliation: | (1) Orenburg State University, pr. Pobedy 13, Orenburg, 460018, Russia;(2) Institute of Problems of Chemical Physics, Russian Academy of Sciences, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432, Russia;(3) Graduated School of Sciences, Hiroshima University, Higashi Hiroshima 739-8526, Japan;(4) University College Cork, Cork, Ireland;(5) National Physical Laboratory, Teddington, UK |
| Abstract: | The magnetic properties of one-dimensional oriented nanowires Ge0.99Co0.01 grown in pores of anodized aluminum oxide membranes are investigate using ferromagnetic resonance spectroscopy. The electron spin resonance signals of the magnetically ordered cobalt subsystem and the charge-carrier subsystem are identified. It is revealed that the anisotropy field at 4 K is equal to 400 Oe and aligned parallel to the nanowire axis. The transverse relaxation time of spin waves at 4 K is estimated to be ～10?10 s. It is shown that the magnetic properties of nanowires are predominantly determined by the ferromagnetism of Co and GeCo alloy clusters. |
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