The effect of microstructure on the laser-induced transverse voltage in Pb-doped Bi2Sr2Co2Oy thin films on tilted substrates

• Published in: Applied physics. A, Materials science & processing Materials science & processing, 2013-06, Vol.111 (4), p.1203-1206
• Main Authors: Yan, Guoying, Wang, Shufang, Chen, Shanshan, Liu, Fuqiang, Bai, Zilong, Wang, Jianglong, Yu, Wei, Fu, Guangsheng
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Cold working, work hardening; annealing, quenching, tempering, recovery, and recrystallization; textures; Condensed Matter Physics; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Liquid phase epitaxy; deposition from liquid phases (melts, solutions, and surface layers on liquids); Machines; Manufacturing; Materials science; Methods of deposition of films and coatings; film growth and epitaxy; Nanotechnology; Optical and Electronic Materials; Physics; Physics and Astronomy; Processes; Surfaces and Interfaces; Thin Films; Treatment of materials and its effects on microstructure and properties
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-012-7366-8

Pb-doped Bi 2 Sr 2 Co 2 O y thin films were prepared on tilted LaAlO 3 (001) by using the chemical solution deposition technique under different annealing temperatures and its laser-induced transverse voltage effect was investigated by using a 308 nm pulsed radiation. The shape of the laser-induced voltages in these films depended strongly on the film microstructure. Films with a larger grain size and better crystalline quality had a voltage signal with greater amplitude and faster response time. The experimental results can be explained by a mechanism involving the transverse thermoelectric effect as well as the transport theory of thermoelectric materials.