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<p>In this study, we theoretically investigate the magnetoresistance (MR) and resistivity variations in Co/Cu magnetic superlattices under idealized conditions. We analyze MR, resistivity in the antiparallel (AP) and parallel (P) magnetic configurations, and the resistivities of Co, Cu, and the entire superlattice as functions of the Cu mean free path (MFP-Cu), ranging from 350&#xa0;Å to 2000&#xa0;Å. Three different Co mean free paths (MFP-Co) are considered: 75&#xa0;Å, 135&#xa0;Å, and 500&#xa0;Å. The study assumes completely specular scattering at the atomically smooth outer surfaces and well-formed interfaces, representing ideal conditions for electron transport. The results reveal a significant increase in MR for MFP-Co = 75&#xa0;Å, highlighting the role of the reduced Co scattering length in enhancing spin-dependent scattering. Additionally, all resistivity values decrease as MFP-Cu increases, indicating that longer MFPs in Cu improve overall electronic transport. These findings underscore the critical roles of both MFP-Co and MFP-Cu in tuning the transport properties of Co/Cu superlattices, offering valuable insights for the design of spintronic devices.</p>

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Magnetoresistance in Co/Cu superlattices with specular surfaces and well-formed interfaces

  • 期刊论文

  • 发表日期：

    2025年6月17日

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  • Bassem Elsafi

摘要

In this study, we theoretically investigate the magnetoresistance (MR) and resistivity variations in Co/Cu magnetic superlattices under idealized conditions. We analyze MR, resistivity in the antiparallel (AP) and parallel (P) magnetic configurations, and the resistivities of Co, Cu, and the entire superlattice as functions of the Cu mean free path (MFP-Cu), ranging from 350 Å to 2000 Å. Three different Co mean free paths (MFP-Co) are considered: 75 Å, 135 Å, and 500 Å. The study assumes completely specular scattering at the atomically smooth outer surfaces and well-formed interfaces, representing ideal conditions for electron transport. The results reveal a significant increase in MR for MFP-Co = 75 Å, highlighting the role of the reduced Co scattering length in enhancing spin-dependent scattering. Additionally, all resistivity values decrease as MFP-Cu increases, indicating that longer MFPs in Cu improve overall electronic transport. These findings underscore the critical roles of both MFP-Co and MFP-Cu in tuning the transport properties of Co/Cu superlattices, offering valuable insights for the design of spintronic devices.