Thermal stability of Ir–Mn as exchange biasing material

J. van Driel, R. Coehoorn, K. M.H. Lenssen, A.E.T. Kuiper, F. R. de Boer

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35 Citations (Scopus)


We have investigated the strength and the thermal stability of Ir–Mn (18 at. % Ir) as an exchange biasing material for [formula omitted] and [formula omitted] for configurations with the Ir–Mn layer both below and above the ferromagnetic (F) layer. The highest interfacial exchange energy ([formula omitted] at 300 K) was found for 10 nm Ir–Mn deposited above a [formula omitted] layer. For all configurations investigated the blocking temperature was approximately 560 K. For 10 or 30 nm Ir–Mn above and for 30 nm Ir–Mn below the F layer a remarkable decrease of the exchange biasing at room temperature was found after heating the film, whereas such an effect was not observed for a 10 nm thick Ir–Mn layer deposited below the F layer. This observation, in combination with the results of a relaxation experiment and the lack of experimental evidence for structural changes upon heating, suggests that heating can induce an irreversible change in the magnetic structure of Ir–Mn layers.

Original languageEnglish
Pages (from-to)5522-5524
Number of pages3
JournalJournal of Applied Physics
Issue number8
Publication statusPublished - 15 Apr 1999
Externally publishedYes


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