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|標題:||Altering the exchange bias in Co90Fe10/(Co,Fe)O bilayers by changing the antiferromagnet's magnetism via interfacial ion-beam bombardment and different single crystalline MgO substrates||Project:||JOURNAL OF APPLIED PHYSICS, Volume 113.||摘要:||
In this study, we investigated the exchange bias (coupling) effects in CoFe/(Co,Fe)O bilayers byusing different single crystal substrates of MgO(100) and MgO(110) and Ar ion-beambombardment on the surface of the bottom antiferromagnet (Co,Fe)O layer before capping withferromagnet CoFe. In the CoFe/(Co,Fe)O/MgO(110) bilayer, above the irreversibility temperature(Tirr. 170 K), there was a rapid decrease in M(T) with increasing temperature, unlike the CoFe/(Co,Fe)O/MgO(100) film that showed an increased Tirr. 300K and no observable decrease inM(T) above Tirr. The different M vs T zero-field-cooled/field-cooled behavior of the CoFe/(Co,Fe)O bilayers on MgO(100) and MgO(110) indicated that the FM CoFe spin orientationswere affected by the different substrates used via exchange coupling to the AF (Co,Fe)O layeraltered by MgO.
|Appears in Collections:||材料科學與工程學系|
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