Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/134916
Title: STUDY OF SPIN CURRENT EFFECT IN METALLIC ANTIFERROMAGNET AND HEAVY METAL HETEROSTRUCTURES
Authors: YANG YUMENG
Keywords: Spin orbit torque, spin Hall magnetoresistance, antiferromagnet, spintronics, spin current, heavy metal
Issue Date: 26-Sep-2016
Source: YANG YUMENG (2016-09-26). STUDY OF SPIN CURRENT EFFECT IN METALLIC ANTIFERROMAGNET AND HEAVY METAL HETEROSTRUCTURES. ScholarBank@NUS Repository.
Abstract: This thesis presents a systematic study of the interactions between spin current generated by Pt, a heavy metal (HM) with strong spin-orbit coupling, and FeMn, a commonly used antiferromagnet (AF), in both FeMn/Pt bilayers and multilayers. First, a large field-like spin orbit torque (SOT) effective field is observed in FeMn/Pt bilayers, which corroborates the spin Hall origin, and is much larger than the SOT observed in ferromagnet/HM bilayers. Second, a large spin Hall magnetoresistance (SMR) is observed in FeMn/Pt bilayers, which further confirms the presence of SOT in the same material system. In the last part, we demonstrated for the first time global FM order and large SOT effect in FeMn/Pt multilayers. Importantly, the SOT is able to rotate the magnetization of the multilayer by 360˚ without the need for any external field.
URI: http://scholarbank.nus.edu.sg/handle/10635/134916
Appears in Collections:Ph.D Theses (Open)

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