Title :
Experimental evidence for gyromagnetic damping in magnetic heads determined by impedance measurements up to 9 GHz
Author :
Kaya, A. ; Bain, J.A.
Author_Institution :
Dept. of Electr. & Comp. Eng., Carnegie Mellon Univ., Pittsburgh, PA, USA
Abstract :
An electrical circuit model of the impedance of the inductive write element valid to within 10% up to 9 GHz is developed and used to extract the (complex) inductance of the magnetic part of the head as a function of frequency. Comparison with theoretical eddy-current and ferromagnetic resonance models of the permeability indicates that the dominant loss mechanism in these heads is gyromagnetic damping. Impedance measurements on the magnetic recording head are made using a vector network analyzer.
Keywords :
electric impedance; gyromagnetic effect; inductance; magnetic heads; magnetic leakage; magnetic permeability; magnetic recording; 9 GHz; dominant loss mechanism; eddy-current model; electrical circuit model; ferromagnetic resonance model; gyromagnetic damping; impedance; inductance; inductive write element; magnetic recording head; permeability; vector network analyzer; Damping; Frequency; Gyromagnetism; Impedance measurement; Inductance; Magnetic circuits; Magnetic heads; Magnetic recording; Magnetic resonance; Permeability;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1463820
