Torque magnetometry: investigation of the intergranular exchange interaction in longitudinal magnetic recording media

F Y Ogrin, C J Oates, Stephen Leslie Lee

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We demonstrate a new method for investigation of intergranular exchange coupling in longitudinal magnetic recording media by means of torque magnetometry. The technique we use is based on an analogy with the DeltaM method where the analysis involves comparison of reversal processes in the sample with different initial magnetic states. We show that the DeltaM curve has an equivalent torque representation Deltatau which can be similarly exploited for studies on the longitudinal media. To validate the method we involve micromagnetic modeling, results of which are compared with the experimental measurements on a model CoCrPtTa media sample. (C) 2002 Elsevier Science B.V. All rights reserved.

Original languageEnglish
Pages (from-to)321-324
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume242-245
Issue number1
DOIs
Publication statusPublished - Apr 2002

Keywords

  • longitudinal magnetic recording media
  • intergranular coupling
  • magnetocrystalline anisotropy

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