2026-09-23T01:52:37Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/121504 2023-12-13 col_2142_5131 col_2142_8859 com_2142_5130 com_2142_8858 com_2142_234

text Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms The student, Kejian Qu, accepted the attached license on 2023-07-11 at 16:49. The student, Kejian Qu, submitted this Dissertation for approval on 2023-07-11 at 16:54. This Dissertation was approved for publication on 2023-07-12 at 16:33. DSpace SAF Submission Ingestion Package generated from Vireo submission #19634 on 2023-12-04 at 17:02:04 Shoemaker, Daniel P Cooper, Lance Mahmood, Fahad Kuo, Eric 2023-08 application/pdf en In-plane magneto-crystalline anisotropy of magnetic kagome intermetallics Qu, Kejian 2023-07-12 Magneto-crystalline Anisotropy Information Storage Antiferromagnetic (AFM) materials are better candidates than ferromagnetic (FM) counterparts for information storage due to the faster switching rate and the inability to affect neighboring domains. Magneto-crystalline anisotropy (MCA) describes the anisotropic magnetic response of a crystalline material along different directions. This energy anisotropy can be utilized for potential information storage. Materials with an in-plane magnetic structure is preferred due to the ease of magnetic switching. In this study, kagome intermetallic family RMn6Sn6 (R = Lu, Er, Y, and Dy) is investigated. After verifying their magnetic structure and properties, the ab-plane MCA is studied from torque magnetometry measurements. It is found that ErMn6Sn6 and DyMn6Sn6 show a 6-fold ab plane torque symmetry, demonstrating their information writing capability, while LuMn6Sn6 and YMn6Sn6 do not show a 6-fold ab-plane torque symmetry. For ErMn6Sn6, anisotropic magneto-resistance measurements showed a 6-fold symmetry in ab-plane as well, demonstrating the information reading capability. This study serves as a successful example of utilization of existing materials for information storage with in-plane MCA. Text eng https://hdl.handle.net/2142/121504 Copyright 2023 Kejian Qu Ph.D. Dissertation Physics University of Illinois at Urbana-Champaign Physics