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Title: Study of spin-dependent transport phenomena in magnetic tunneling systems?
Keywords: spintronics, magnetism, tunneling, MgO, MTJs, granular
Issue Date: 14-Aug-2012
Source: AJEESH MAVOLIL SAHADEVAN (2012-08-14). Study of spin-dependent transport phenomena in magnetic tunneling systems?. ScholarBank@NUS Repository.
Abstract: The study of spin-dependent tunneling systems has stimulated both fundamental as well as commercial interest. For example, a magnetic granular system enables the study of interesting physics such as the coulomb blockade effect and higher order tunneling processes. Magnetic tunnel junctions (MTJ) are utilized for the high density storage hard disc drives and magnetoresistive random access memories. For the first part of the thesis, we have studied the magnetic field dependent hysteretic transport properties in magnetic granular Co/Al2O3 multilayers, experimentally and theoretically. The data show that the switching voltage can be significantly decreased with increasing the magnetic field. We also show changes in the magnetization of the Co granules with the electric fields. In the second part, we have investigated the effect of mechanical strain on MTJs using a diamond-like carbon film and magneto-capacitance in MTJs. The junction resistance as well as the tunnel magnetoresistance (TMR) reduces due to strain.
Appears in Collections:Ph.D Theses (Open)

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