2026-09-19T23:17:28Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/82760 2023-07-11 col_2142_5131 col_2142_13836 com_2142_5130 com_2142_13835 com_2142_234

Payne, David A. Clothier, Brent Allen 2015-09-25T20:52:54Z 2015-09-25T20:52:54Z 10000-01-01 2005 2005 The cubic lattice parameters of the films (i.e., a = ∼ 3.90 A) were in excellent agreement with values published in the literature for bulk, polycrystalline powders. Typical grain sizes started at 10--15 nm, increasing to 20--25 nm by 750°C. For films deposited on Si(100), magnetoresistance was observed in specimens heat treated at 700°C and 750°C, and for platinized-Si(100), 650°C, 700°C, and 750°C. Magnetoresistive response improved with heat-treatment temperature for the more refractory La0.67Ba0.33MnO3 composition. The lead-doped counterpart offered the best property evolution, with TC = 320 K and TIM = 254 K by 750°C on platinized-Si(100). All corresponding transport curves were symmetric, demonstrating clear metal-insulator transitions (i.e., TIM). High resistivities (i.e., ∼ 106 O-cm) were attributed to the fine-grain microstructure. Weak-field cycling between +/-500 Oe yielded symmetrical loops with appreciable linear regions, a highly-desirable characteristic for magnetic sensing applications. Made available in DSpace on 2015-09-25T20:52:54Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3182241.pdf: 18619066 bytes, checksum: 06b64460f288733aededb1bbf6485d64 (MD5) Previous issue date: 2005 Embargo set by: Seth Robbins for item 84041 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 352 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2005. http://hdl.handle.net/2142/82760 (MiAaPQ)AAI3182241 eng Engineering, Materials Science The Development of Alkoxy-Based Sol -Gel Processing for Magnetoresistive Manganite Thin Films text Materials Science and Engineering Materials Science and Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.