Report
Antiferromagnet-mediated interlayer exchange: hybridization versus proximity effect
| العنوان: | Antiferromagnet-mediated interlayer exchange: hybridization versus proximity effect |
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| المؤلفون: | Polishchuk, D. M., Tykhonenko-Polishchuk, Yu. O., Lytvynenko, Ya. M., Rostas, A. M., Kuncser, V., Kravets, A. F., Tovstolytkin, A. I., Gomonay, O. V., Korenivski, V. |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | We investigate the interlayer coupling between two thin ferromagnetic (F) films mediated by an antiferromagnetic (AF) spacer in F*/AF/F trilayers and show how it transitions between different regimes on changing the AF thickness. Employing layer-selective Kerr magnetometry and ferromagnetic-resonance techniques in a complementary manner enables us to distinguish between three functionally distinct regimes of such ferromagnetic interlayer coupling. The F layers are found to be individually and independently exchange-biased for thick FeMn spacers - the first regime of no interlayer F-F* coupling. F-F* coupling appears on decreasing the FeMn thickness below 9 nm. In this second regime found in structures with 6.0-9.0 nm thick FeMn spacers, the interlayer coupling exists only in a finite temperature interval just below the effective N\'eel temperature of the spacer, which is due to magnon-mediated exchange through the thermally softened antiferromagnetic spacer, vanishing at lower temperatures. The third regime, with FeMn thinner than 4 nm, is characterized by a much stronger interlayer coupling in the entire temperature interval, which is attributed to a magnetic-proximity induced ferromagnetic exchange. These experimental results, spanning the key geometrical parameters and thermal regimes of the F*/AF/F nanostructure, complemented by a comprehensive theoretical analysis, should broaden the understanding of the interlayer exchange in magnetic multilayers and potentially be useful for applications in spin-thermionics. Comment: 14 pages, 9 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.107.224432 |
| URL الوصول: | http://arxiv.org/abs/2303.09301 |
| رقم الانضمام: | edsarx.2303.09301 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.107.224432 |
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