Abstract
The shielded vertical magneto-resistive heads (MRH) design overcomes the short-wavelength “shunting” deficiencies of the unshielded anisotropic magneto-resistive head (AMRH). In the unshielded configuration, the vertical component, Hy, of the tape or disk-fringing field can be large even when the sources of the fringing field, magnetic poles, are far away from the magneto-resistive element (MRE). This “distant sensing” of the unshielded MRH causes its undesirable wide output pulse and short-wavelength spectral roll-off behavior. When shields are added, however, the magnetic flux flow pattern around the recorded medium is changed profoundly. The changes are due to the changed boundary conditions imposed by the shields. The overall effect of the shields is, therefore, to defer appreciable flux flowing up or down in the MRE until the last possible moment as the poles actually cross the top of the MRE. To calculate the output voltage spectrum of the shielded MRH, it is necessary to understand not only the magnetic transmission line phenomenon but also the dependence of the MRE flux on the recorded wave number, k.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
