Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"magnetization switching"”.
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Study of Magnetization Switching for MRAM Based Memory Technologies
Understanding magnetization reversal is very important in designing high density and high data transfer rate recording media. This research has been motivated by interest in developing new nonvolatile data storage solutions as magnetic random access memories - MRAMs. This dissertation is intended …
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Study of Magnetization Switching in Coupled Magnetic Nanostructured Systems
A study of magnetization dynamics experiments in nanostructured materials using the rf susceptibility tunnel diode oscillator (TDO) method is presented along with a extensive theoretical analysis. An original, computer controlled experimental setup that measures the change in susceptibility with …
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Manipulation of spin textures by unconventional spin torques
… devices. The manipulation of nonuniform magnetization textures such as domain walls and skyrmions provide both a means to control magnetism in devices, and to gain new fundamental insights into spin-charge and spin-orbital interactions in magnetic materials. In this thesis, we examine …
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Magnetic properties of lithographically patterned thin film magnetic elements for magnetic random access memory applications
… properties of the patterned elements, including magnetization switching mechanisms, switching field distribution, magnetic thermal stability, and magnetostatic interactions, have been studied using magnetic force microscopy (MFM), SQUID magnetometer, alternating gradient magnetometer (AGM) and …
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NONLINEAR SPIN DYNAMICS AND ULTRA-FAST PRECESSIONAL SWITCHING
… is intended to provide a theoretical analysis of magnetization dynamics in nanometer scale structures over picosecond time scales. This research has been motivated by promising technological applications in the area of magnetic data storage, as well as by pure scientific quest for ultra-fast spin …
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Tunable spin-charge conversion in vanadium dioxide
… demonstrated utilizing spin-orbit-torque based magnetization switching. A large, pure spin current is crucial for these applications and significant effort is geared towards finding materials with large charge-to-spin conversion efficiency to exploit the full potential of spintronics. The …
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VISUALIZATION OF CURRENT INDUCED SPIN ACCUMULATIONS IN THE STRONG SPIN-ORBITAL COUPLING MATERIALS
… IrMn3. We finally show the current induced magnetization switching in the IrMn/CoTb system. Our results pave the way for a better understanding of the current induced spin accumulations in various materials as well as the interaction between charge, spin, and light.
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Mechanism and assessment of spin transfer torque (STT) based memory
… will exert a spin transfer torque to switch the magnetization of the free layer. This is the fundamental of the novel write mechanism in STT-RAM, current-induced magnetization switching. It allows STT-RAM to have a smaller cell size and write current than MRAM, and also capable of what MRAM …
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Spin-orbit torque switching of compensated ferrimagnetic cobalt-terbium alloys
… to be more competitive, further reductions in switching energy and switching speed are needed. Recently, there has been interest in using antiferromagnetically coupled materials instead of ferromagnetic materials to store information. Compared with ferromagnetic materials, antiferromagnetically …
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Aspects of Dzyaloshinskii-Moriya Interaction in Two Dimensional Magnetic Structures
… with specifc chirality. In addition: I study switching of magnetization with ultrafast laser pulse by inverse Faraday e ect (IFE) where an optically induced non-equilibrium orbital momentum generates an e ective magnetic eld via spin-orbit coupling for magnetization switching. I calculate the …
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Electrical injection and detection of spin polarization in InSb/ferromagnet nanostructures
… processing techniques. The saturation magnetizations of various CoFe electrodes with different widths are calculated from Hall measurements in which the fringing fields of the CoFe electrodes are detected. A magnetic model provides reasonable estimation of the saturation magnetization …
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BOOLEAN AND BRAIN-INSPIRED COMPUTING USING SPIN-TRANSFER TORQUE DEVICES
… (CMOS) roadmap. The high speed magnetization switching of a nano-magnet due to current induced spin-transfer torque (STT) have been demonstrated in recent experiments. Such STT devices can be explored in compact, low power memory and logic design. In order to truly leverage STT …
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Spin-torque induced high frequency excitations and switching in spin-valve nanocontacts
… (i.e. maxima and minima) close to the free layer magnetization switching field. For certain field and current regimes metastable dynamic states are clearly demonstrated. The influence of the magnetic free layer moment and of the nanocontact size on these spintorque related phenomena are …
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Optical studies of current-induced spin-orbit effects in magnetic systems
… for more than a decade thanks to their promising magnetization-switching efficiencies. This dissertation presents experimental studies of current-induced novel phenomena arising from the spin-orbit interaction in magnetic materials. We first develop a highly-sensitive SOT magnetometer system based …