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Among the known magnetic material systems, most are either purely antiferromagnetic or purely ferromagnetic at temperatures up to their critical temperature. There are only very few examples of materials that undergo a temperature dependent phase transition from an antiferromagnetic to a ferromagnetic phase or vice versa, and of these, only the chemically ordered alloy FeRh exhibits this transition near room temperature. Here we present a perpendicular anisotropy multilayer structure that by careful tuning of the constituent layers and their coupling mimics the magnetic behavior of FeRh, yet allows great flexibility in tuning its magnetic properties over a wide temperature range.
Published in:
Applied Physics Letters
(Volume:92
,
Issue:
24
)
Date of Publication: Jun 2008