Dependence of exchange coupling direction on cooling-field strength

Jangyup Son, Soogil Lee, Sangho Lee, Sanghoon Kim, Jongill Hong

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We studied the dependence of exchange coupling on cooling-field strength in an exchange-biased spin valve with a synthetic antiferromagnetic layer by experiment and theory. Our theory calculates magnetic anisotropy energies in each magnetic layer composing the spin valve during the field-cooling process, finds the minimum state of total energy, and explains how the magnetizations in the layers interact with one another during field-cooling under various cooling-field strengths. Calculations based on the theory well match results of the experimental measurements. Our observation shows that one has to carefully choose the cooling-field strength optimal for designing exchange-biased spin devices having a synthetic antiferromagnetic layer; otherwise the exchange coupling direction can significantly deviate from the cooling-field direction, which impairs performance.

Original languageEnglish
Article number053908
JournalJournal of Applied Physics
Volume110
Issue number5
DOIs
Publication statusPublished - 2011 Sep 1

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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