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 20 of 20 for “"Yig"”.
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Atomic structure characterization for YIG/ permalloy heterostructures
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-05-01
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Spin wave characterization in a 1D YIG magnonic crystal
… in a one-dimensional (1D) yttrium iron garnet (YIG) magnonic crystal using time-resolved Brillouin light scattering (TR-BLS) measurements. Magnonic crystals are a promising candidate to aid in developing spin-based devices that exploit the spin of the electron since magnonic crystals can be used …
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DNA hydrolysis and genome editing applications of GIY-YIG family homing endonucleases
… studies, I examine the cleavage mechanism of GIY-YIG family homing endonucleases, as until now the method by which they hydrolyze DNA has remained poorly understood. Using the GIY-YIG homing endonuclease I-BmoI as a model system, I investigate the amino acid, nucleotide, and divalent metal ion …
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Nanometer-thick yttrium iron garnet film development and spintronics-related study
… interest in using yttrium iron garnet (Y3Fe5O12, YIG) materials for magnetic insulator-based spintronics studies. This interest derives from the fact that YIG materials have very low intrinsic damping. The development of YIG-based spintronics demands YIG films that have a thickness in the …
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Nonlinear spin waves in magnetic thin films - foldover, dispersive shock waves, and spin pumping
… the spin Seebeck effect in yttrium iron garnet (YIG)/Pt bi-layer structures are studied in this thesis and are reported in detail in Chapters 4-7. In the fourth chapter, the first observation of foldover effect of nonlinear eigenmodes in feedback ring systems is reported. The experiments made use …
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Properties of off stoichiometric yttrium iron garnet
… RSM results show that the off-stoichiometric YIG film on (111) GGG substrates can remain fully strained in plane with thickness from 23 nm to 74 nm; while the samples on (001) GGG substrates show different degrees of relaxation in-plane depending on film thickness. Magnetic characterization …
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Nanoparticle-chiral nematic liquid crystal composites
… to produce magnetooptical yttrium iron garnet (YIG) nanoparticles with an average diameter on the order of 15-50 nm. It was determined that a commercially available yttrium iron oxide nanopowder (purchased from Sigma-Aldrich Corporation) exhibited YIG and orthorhombic yttrium iron oxide (YFeO3) …
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Magneto-optical and multiferroic oxide thin films, integrated nonreciprocal photonic devices and multiferroic memory devices
… growth method of magneto-optical Ce1Y2Fe5O12 (Ce:YIG) films. The spectral and substrate orientation dependence of the magneto-optical figure of merit of epitaxial Ce: YIG on GGG substrates show very high magneto-optical figure of merit (379-400° dB-1 at [lambda] = 1550 nm for all substrate …
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Magnon and phonon thermal transport in oxides
… the magnon-phonon thermal transport inside the YIG crystal, and also to understand the electron-magnon transport across metal-YIG interfaces. In particular, I would like to see how different deposition techniques can affect the thermal conductivity of YIG thin films. Knowing the thermal …
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Current-induced torques in ferromagnets at room temperature
… torques (CITs) in two different systems, namely YIG/heavy metal bilayers and bulk NiMnSb, at room temperature. We apply a microwave current to the sample while sweeping the external magnetic field, and measure the longitudinal DC voltage. From a symmetry analysis of the ferromagnetic resonance …
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Quantum transport in gapped graphene
… ($\text{Y}_{3}\text{Fe}_{5}\text{O}_{12}$ or YIG). The first part describes in detail the pulse laser deposition of atomically flat YIG thin films onto single crystal gadolinium gallium garnet with a magnetization of 144 emu cm$^{-3}$. This part also outlines device fabrication procedures …
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Spin Shot Noise measurement
… spin Seebeck effect in yttrium iron garnet (YIG) on gadolinium gallium garnet (GGG). Measurements have shown indications at low temperatures of a contribution to the spin Seebeck voltage noise in the inverse spin Hall detector that is present when the magnetization of the underlying YIG/GGG …
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The Interplay of Spin, Charge, and Heat: From Metal/Insulator Heterostructures to Perovskite Bilayers
… on a bulk polycrystalline yttrium-iron-garnet (YIG) substrate. This project analyzed the spin transport in the Cr films versus thickness via the longitudinal spin Seebeck effect (LSSE). This research revealed a complex thickness dependence of the spin-to-charge conversion and LSSE voltages for …
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Electrical Manipulation of Spin Dynamics in Ferromagnetic Multi-layers
… of two ferromagnetic materials (FeAlSi and YIG), studying the various torques present in the ferromagnets and examining the temperature dependence of a ferromagnet/superconductor heterostructure. FeAlSi Hall bars fabricated on 10 nm-thick FeAlSi films grown on a MgO substrate are …
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Domain Wall Based Magnonics in Iron Garnet
… wall velocities reported in yttrium iron garnet (YIG), bismuth substituted YIG, and thulium iron garnet lay the foundations for high-speed operation. These unique attributes position garnets as ideal materials for the development of magnonic devices that integrate efficiency, speed, and …
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Picosecond Spin Seebeck Effect in Magnetic Insulators
… the picosecond SSE in well-studied ferrimagnetic YIG at low temperatures (Chapter 4) points out key differences with respect to previous electrical measurements done at low frequency. Comparing two antiferromagnets from the same magnetic class but with very different values of the …
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Iron Garnet Thin Films for Integrated Photonics and Spintronics
… of top-down crystallized polycrystalline BiYIG/YIG films on Si exhibit a record high MO figure of merit (FoM) of up to 770° dB⁻¹ at 1550 nm wavelength. Growth of single phase BiYIG on the sidewalls of waveguides is also demonstrated, which can be used in transverse electric-mode devices. …
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The design and realisation of electronically tunable dielectric resonator microstrip filters
… tuned filters employing yttrium iron garnet (YIG) resonators. An alternative solution to this problem is to utilise high-Q dielectric resonators (DRs) in-conjunction with an appropriate tuning mechanism to realise tunable filters. DRs can provide unloaded Q-factors comparable to waveguide …
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Magnetic and thermal properties of metallic antiferromagnetic materials
… MOKE coefficient of ferromagnetic cobalt and YIG thin films, and the field-dependent quadratic magneto-optical signal of Fe2As. The noise floor of the mapping system is determined to be ∼ 10^−5
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Investigation of spin-caloric and spin-orbit torque materials by vectorial spin Seebeck measurements and an advanced x-ray magnetic reflectivity analysis
… insulator (FMI) such as Yittrium Iron Garnet (YIG) or Nickelferrite (NFO). These FMIs represent a promising class of material for the implementation in spin caloric devices since the insulating character suppresses inadvertent charge currents which possibly prevent the detection of spin …