Dependence of exchange coupling direction on cooling-field strength

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

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


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
Issue number5
Publication statusPublished - 2011 Sept 1

Bibliographical note

Funding Information:
This research was supported in part by Samsung Electronics Co., Basic Science Research Program (2011-0003263) and Pioneer Research Center Program (2011-000-2116) funded by the Ministry of Education, Science and Technology, and the IT R&D program of MKE/KEIT (KI002189, Technology Development of 30 nm Level High Density Perpendicular STT-MRAM) in Korea.

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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