Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/134397
Title: Theory and simulation of magnetism and spin transport in semiconductors
Authors: AGRAWAL SAURABH
Keywords: Interfacial Resistance, Spin-injection, Spin-polarization, Spin-transport, Spin-diffusion, Magnetoresistance
Issue Date: 21-Jan-2006
Source: AGRAWAL SAURABH (2006-01-21). Theory and simulation of magnetism and spin transport in semiconductors. ScholarBank@NUS Repository.
Abstract: <P>A THEORETICAL MODEL OF SPIN-TRANSPORT IN FERROMAGNET-SEMICONDUCTOR HYBRID STRUCTURES WHICH TAKES INTO ACCOUNT THE EFFECTS OF INTERFACE RESISTANCE HAS BEEN PRESENTED. SPIN-INJECTION EFFICIENCY AND MAGNETORESISTANCE WHICH ARE THE KEY PARAMETERS IN ANY SPINTRONICS DEVICE ARE STUDIED IN DETAIL. IT WAS FOUND THAT INTERFACIAL RESISTANCE WHICH IS DUE TO SPIN-SELECTIVE TUNNEL BARRIER AT BOTH THE INTERFACES OF HYBRID STRUCTURE PLAYS A CRUCIAL ROLE IN DETERMINING THE SPIN-INJECTION EFFICIENCY AND MAGNETORESISTANCE WHICH ARE THE PRINCIPAL REQUIREMENTS OF ANY SPINTRONICS DEVICE. TO ANALYZE THE SPIN-INJECTION EFFICIENCY IN THE STRUCTURE, A SELF-CONSISTENT MODEL HAS ALSO BEEN DEVELOPED WHICH CONSIDERS THE SPIN-TRANSPORT TO BE DIFFUSIVE IN THE BULK OF THE FERROMAGNET AND BALLISTIC WITHIN THE VICINITY OF INTERFACES. SPIN-DEPENDENT PROPERTIES ARE STUDIED AS A FUNCTION OF BARRIER-HEIGHTS AND IT WAS FOUND THAT SPIN-DEPENDENT INTERFACIAL RESISTANCE, SPIN-INJECTION EFFICIENCY AND MAGNETORESISTANCE INCRE
URI: http://scholarbank.nus.edu.sg/handle/10635/134397
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