تقرير
Generalized magnetoelectronic circuit theory and spin relaxation at interfaces in magnetic multilayers
| العنوان: | Generalized magnetoelectronic circuit theory and spin relaxation at interfaces in magnetic multilayers |
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| المؤلفون: | Flores, G. G. Baez, Kovalev, Alexey A., van Schilfgaarde, M., Belashchenko, K. D. |
| المصدر: | Phys. Rev. B 101, 224405 (2020) |
| سنة النشر: | 2020 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science |
| الوصف: | Spin transport at metallic interfaces is an essential ingredient of various spintronic device concepts, such as giant magnetoresistance, spin-transfer torque, and spin pumping. Spin-orbit coupling plays an important role in many such devices. In particular, spin current is partially absorbed at the interface due to spin-orbit coupling. We develop a general magnetoelectronic circuit theory and generalize the concept of the spin mixing conductance, accounting for various mechanisms responsible for spin-flip scattering. For the special case when exchange interactions dominate, we give a simple expression for the spin mixing conductance in terms of the contributions responsible for spin relaxation (i.e., spin memory loss), spin torque, and spin precession. The spin-memory loss parameter $\delta$ is related to spin-flip transmission and reflection probabilities. There is no straightforward relation between spin torque and spin memory loss. We calculate the spin-flip scattering rates for N|N, F|N, F|F interfaces using the Landauer-B\"uttiker method within the linear muffin-tin orbital method and determine the values of $\delta$ using circuit theory. Comment: 12 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.101.224405 |
| URL الوصول: | http://arxiv.org/abs/2003.12221 |
| رقم الأكسشن: | edsarx.2003.12221 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.101.224405 |
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