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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/100/1713

Title: Direct injection of spin-polarized carriers across YBa2Cu3O7-delta-La0.3Ca0.7MnO3 interface at 77 K
Authors: UPADHYE, KV
KUMARA, KG
PURANDARE, SC
PAI, SP
PINTO, R
Keywords: heterostructures
superconductor
ferromagnet
Issue Date: 2002
Publisher: INDIAN ACADEMY SCIENCES
Citation: PRAMANA-JOURNAL OF PHYSICS,58,1199-1201
Abstract: We report here injection of spin-polarized carriers from a half-metallic La0.3Ca0.7MnO3 (LCMO) colossal magnetoresistive (CMR) thin film into a high-temperature superconducting YBa2Cu3O7-delta (YBCO) thin film studied using a micro-bridge. The LCMO and YBCO films were grown on <100> LaAlO3 (LAO) substrate sequentially using pulsed laser deposition (PLD). I-V measurements carried out at 77 K show that while normal critical current, l(c)(n), of the micro-bridge is 80 mA, the critical current, l(c)(p), through the micro-bridge when injected from the CMR layer is 38 mA. This clearly shows that spin-polarized quasiparticles injected from the CMR layer into the YBCO layer suppress the critical current of the superconductor via the pair-breaking phenomena.
URI: http://dx.doi.org/10.1007/s12043-002-0239-5
http://dspace.library.iitb.ac.in/xmlui/handle/10054/14880
http://hdl.handle.net/100/1713
ISSN: 0304-4289
Appears in Collections:Proceedings papers

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