Temperature dependence of Ba-Ferrite bubble memory bias magnets as a function of magnet geometry

W. J. DeBonte, A. D. Butherus

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The coefficient of the linear variation of field strength with temperature in Ba-ferrite is shown to have a simple functional dependence upon the permeance coefficient (B/H ratio) of the magnet structure. Using cylindrical magnets with aspect ratios of 0.030 to 4.00 and measuring the field strength from −35°C to +65°C, we observe temperature coefficients varying by about 40% from −0.150%/°C to −0.207%7°C. These values have a simple relationship to calculated magnet permeance coefficients. An analog circuit approach is presented for calculating the permeance coefficients of complex bias magnet systems. The temperature coefficients predicted from the calculated permeance coefficients and the measured bias field temperature dependences are in good agreement.

Original languageEnglish (US)
Pages (from-to)648-650
Number of pages3
JournalIEEE Transactions on Magnetics
Volume12
Issue number6
DOIs
StatePublished - Nov 1976
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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