Low field microwave absorption and magnetization process in CoFeNi electroplated wires
H. Garcìa-Miquela)† and G.V. Kurlyandskayab)c)
a E.T.S.I.Telecomunicación, Dpto. Ing. Electrónica, Universidad Politécnica de Valencia, Camino de Vera s/n, Valencia 46022, Spain; b Universidad del País Vasco UPV-EHU, Dept. Electricidad y Electrónica, Apdo. 644, Bilbao 48080, Spain; cDepartment of Physics, Ferromagnetic Resonance Group, University of Maryland,College Park, Maryland 20742-4111, USA
Abstract Ferromagnetic resonance (FMR), Ferromagnetic antirresonance (FMAR) and low field magnetoimpedance (MI) are the characteristic features of high frequency losses in applied fields. While some results on FMR and FMAR in CoFeNi electroplated wires were reported earlier, here we present microwave absorption in CuBe wires electroplated by 1 $\mu$m FeCoNi magnetic layer at very low fields. These data are comparatively analysed together with longitudinal hysteresis loops in order to reveal the correlation between power absorption and magnetization processes. Microwave studies are made by using the cavity perturbation method at 9.65 GHz for a DC field parallel to the sample axis, and with microwave magnetic field $h_{\rm rf}$ parallel or perpendicular to the wire axis. Two peaks have been observed in all samples, one is due to FMR, and the other is, at very low fields, related to MI. The MI peaks represent minima in power absorption. By comparing with the hysteresis loop we remark the close correspondence between the MI phenomena in the axial mode and the concomitant magnetization process.
Received: 20 July 2007
Revised: 11 November 2007
Accepted manuscript online:
(Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance)
Cite this article:
H. Garcìa-Miquel and G.V. Kurlyandskaya Low field microwave absorption and magnetization process in CoFeNi electroplated wires 2008 Chin. Phys. B 17 1430
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
