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Shoemaker, Daniel P. Yu, Jingwen 2018-09-27T16:45:27Z 2018-09-27T16:45:27Z 2020-09-28T09:15:22Z 2018-05-03 2018-08 CuMnAs was first studied more than fifty years ago, both in a tetragonal phase (t-CuMnAs) and orthorhombic phase (o-CuMnAs). Today, the prospect of spintronics has created a new focus on antiferromagnetic materials with Néel temperatures above room temperature, with the goal of reading and writing spin orientations by electrical current. Tetragonal CuMnAs is a candidate whose experimental reading and writing with electrical field has been realized as a proof of concept. Our fundamental knowledge of other phases in the Cu-Mn-As ternary system remains to be improved. In this study, we study a broader part of the phase diagram of this system. We examine the structure of different phases, their thermal and magnetic properties, and the relationship between stoichiometry and structure. We also present our synthetic and magnetic characterization of antiferromagnetic Mn3B4. Single crystals larger than 200 microns were obtained and examined by single-crystal diffraction and magnetometry. Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2020-08-01 The student, Jingwen Yu, accepted the attached license on 2018-05-02 at 10:19. The student, Jingwen Yu, submitted this Thesis for approval on 2018-05-02 at 10:27. This Thesis was approved for publication on 2018-05-03 at 15:39. DSpace SAF Submission Ingestion Package generated from Vireo submission #12499 on 2018-09-27 at 11:32:47 Made available in DSpace on 2018-09-27T16:45:27Z (GMT). No. of bitstreams: 2 YU-THESIS-2018.pdf: 8231086 bytes, checksum: b619ecd04da159a4c260a1d160192671 (MD5) LICENSE.txt: 4207 bytes, checksum: 7eca9d317aee2b59f0b732c8e66ce38e (MD5) Previous issue date: 2018-05-03 Embargo set by: Seth Robbins for item 107840 Lift date: 2020-09-27T16:45:39Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system Embargo set by: Seth Robbins for item 107840 Lift date: 2020-09-27T16:47:41Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system Limited Restriction Lifted for Item 107840 on 2020-09-28T09:15:22Z. application/pdf http://hdl.handle.net/2142/101740 en Copyright 2018 Jingwen Yu Antiferromagnets, Phase Diagram. Exploration of the CU-MN-AS ternary phase diagram and MN3B4 antiferromagnets text text Materials Science & Engineerng Materials Science & Engr University of Illinois at Urbana-Champaign Thesis M.S.