کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1797658 1524800 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Interface adjustment and exchange coupling in the IrMn/NiFe system
ترجمه فارسی عنوان
تنظیم رابط و جفت تبادل اطلاعات در سیستم IrMn/NiFe
کلمات کلیدی
جفت ارز مغناطیسی؛ مدولاسیون رابط؛ رفتار مغناطیسی شیشه؛ طول همبستگی مغناطیسی؛ فضا مس
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
چکیده انگلیسی


• Exchange bias effect in IrMn/NiFe samples with interfacial Cu spacer.
• A variation of exchange bias with time is observed in as-deposited samples.
• Magnetic modification of the interface by varying the stack sequence and Cu thickness.
• Interface adjustment affects the dynamics of interfacial IrMn spins.
• The exchange bias properties can be tuned by interface adjustment.

The exchange bias effect was investigated, in the 5–300 K temperature range, in samples of IrMn [100 Å]/NiFe [50 Å] (set A) and in samples with inverted layer-stacking sequence (set B), produced at room temperature by DC magnetron sputtering in a static magnetic field of 400 Oe. The samples of each set differ for the nominal thickness (tCu) of a Cu spacer, grown at the interface between the antiferromagnetic and ferromagnetic layers, which was varied between 0 and 2 Å. It has been found out that the Cu insertion reduces the values of the exchange field and of the coercivity and can also affect their thermal evolution, depending on the stack configuration. Indeed, the latter also determines a peculiar variation of the exchange bias properties with time, shown and discussed with reference to the samples without Cu of the two sets. The results have been explained considering that, in this system, the exchange coupling mechanism is ruled by the glassy magnetic behavior of the IrMn spins located at the interface with the NiFe layer. Varying the stack configuration and tCu results in a modulation of the structural and magnetic features of the interface, which ultimately affects the spins dynamics of the glassy IrMn interfacial component.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 421, 1 January 2017, Pages 234–240
نویسندگان
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