3 June 1998 Pulsed-laser deposition of YBa2Cu307-La0.67Sr0.33MnO3 thin film multilayers for spin injection devices
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Abstract
Pulsed laser deposition has been used for the growth of high quality YBa2Cu3O7 and La0.67Sr0.33MnO3 thin films and multilayers for electronic device applications. In particular, YBa2Cu3O7 - (SrTiO3, CeO2) - La0.67Sr0.33MnO3 trilayer devices were fabricated to study the supercurrent suppression by the injection of a spin-polarized quasiparticle current. Our results show that the critical current for a YBa2Cu3O7 - 50 angstroms SrTiO3 - La0.67Sr0.33MnO3 device was found to decrease from 120 mA to 15 mA, for an injection current of 60 mA of spin polarized current yielding a negative current gain of approximately 1.8. The effect of film microstructure on the critical current suppression was investigated. Defects in the SrTiO3 and CeO2 layers were found to control the device properties. Once optimized, spin injection represents a new approach to fabricating superconducting transistors which could impact electronic systems for many important next generation.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Douglas B. Chrisey, Jeonggoo Kim, Rhonda M. Stroud, Dan Koller, Michael S. Osofsky, Robert J. Soulen, J. M. Byers, Charles R. Eddy, Raymond C. Y. Auyeung, James S. Horwitz, "Pulsed-laser deposition of YBa2Cu307-La0.67Sr0.33MnO3 thin film multilayers for spin injection devices", Proc. SPIE 3274, Laser Applications in Microelectronic and Optoelectronic Manufacturing III, (3 June 1998); doi: 10.1117/12.309523; https://doi.org/10.1117/12.309523
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