Report
Substrate-induced antiferromagnetism of an Fe monolayer on the Ir(001) surface
| العنوان: | Substrate-induced antiferromagnetism of an Fe monolayer on the Ir(001) surface |
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| المؤلفون: | Kudrnovsky, Josef, Maca, Frantisek, Turek, Ilja, Redinger, Josef |
| المصدر: | Phys. Rev. B 80 (2009) 064405, p1-8 |
| سنة النشر: | 2009 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science |
| الوصف: | We present detailed ab initio study of structural and magnetic stability of a Fe-monolayer on the fcc(001) surface of iridium. The Fe-monolayer has a strong tendency to order antiferromagnetically for the true relaxed geometry. On the contrary an unrelaxed Fe/Ir(001) sample has a ferromagnetic ground state. The antiferromagnetism is thus stabilized by the decreased Fe-Ir layer spacing in striking contrast to the recently experimentally observed antiferromagnetism of the Fe/W(001) system which exists also for an ideal bulk-truncated, unrelaxed geometry. The calculated layer relaxations for Fe/Ir(001) agree reasonably well with recent experimental LEED data. The present study centers around the evaluation of pair exchange interactions between Fe-atoms in the Fe-overlayer as a function of the Fe/Ir interlayer distance which allows for a detailed understanding of the antiferromagnetism of a Fe/Ir(001) overlayer. Furthermore, our calculations indicate that the nature of the true ground state could be more complex and display a spin spiral-like rather than a c(2x2)-antiferromagnetic order. Finally, the magnetic stability of the Fe monolayer on the Ir(001) surface is compared to the closely related Fe/Rh(001) system. Comment: 8 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.80.064405 |
| URL الوصول: | http://arxiv.org/abs/0907.3567 |
| رقم الانضمام: | edsarx.0907.3567 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.80.064405 |
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