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The manipulation of the antiferromagnetic interlayer coupling in theepitaxial Fe/Cr/Fe(001) trilayer system by moderate 5 keV He ion beamirradiation has been investigated experimentally. It is shown that even forirradiation with very low fluences (10^14 ions/cm^2) a drastic change instrength of the coupling appears. For thin Cr-spacers (below 0.6 - 0.7 nm) thecoupling strength decreases with fluence, becoming ferromagnetic for fluencesabove (2x10^14 ions/cm^2). The effect is connected with the creation ofmagnetic bridges in the layered system due to atomic exchange events caused bythe bombardment. For thicker Cr spacers (0.8 - 1.2 nm) an enhancement of theantiferromagnetic coupling strength is found. A possible explanation of theenhancement effect is given.Comment: Submitted to PR

physical review letters

Control of Interlayer Exchange Coupling in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="normal">F</mml:mi><mml:mi mathvariant="normal">e</mml:mi><mml:mo>/</mml:mo><mml:mi mathvariant="normal">C</mml:mi><mml:mi mathvariant="normal">r</mml:mi><mml:mo>/</mml:mo><mml:mi mathvariant="normal">F</mml:mi><mml:mi mathvariant="normal">e</mml:mi></mml:math>Trilayers by Ion Beam Irradiation

Control of Interlayer Exchange Coupling inFe/Cr/FeTrilayers by Ion Beam Irradiation