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.
Results
Showing 1 to 20 of 47 for “"Magnetic behavior"”.
-
Novel magnetic behavior in heavy rare earth superlattices
Structural and magnetic properties of heavy rare earth films and superlattices synthesized by molecular beam epitaxy are investigated. Epitaxial films of rare earth metals, and superlattices of rare earths with Y interlayers, are grown along different hcp orientations using novel techniques …
-
Magnetic iron oxide nanoparticles: synthesis, characteristics, magnetic behavior, and biomedical applications
Magnetic iron oxide nanoparticles are attracting increasing attention due to their interesting properties that can be applied in a great number of applications such as catalysis and biomedicine. This thesis focuses on the synthesis, characteristics, and biomedical applications of iron oxide …
-
Magnetic behavior of 360° domain walls in patterned magnetic thin films
… sense, demonstrate qualitatively distinct behaviors from their constituent 180DWs and are therefore of interest both from a physics perspective and for their applications in future domain wall devices. This thesis presents experimental and modeling-based investigation of the properties and …
-
Structural and magnetic properties of erbium thin films and erbium/yttrium superlattices
The magnetic and structural properties of crystalline erbium thin films and Er/Y superlattices, grown by Molecular Beam Epitaxy, have been analyzed by x-ray scattering, bulk magnetization measurements and neutron diffraction. By comparing the data for the two systems, the effects of the interfacial …
-
Two-dimensional and three-dimensional magnetism in ultrathin epitaxial rare-earth metal films
This thesis reports the investigation of the magnetic behavior of ultrathin epitaxial films of the heavy rare-earth elements; Gd, Er, and Dy, grown with the technique of Molecular Beam Epitaxy (MBE). By employing advanced film fabrication techniques, each magnetic rare-earth element layer, between …
-
Magnetism and interactions at the nanoscale: synthesis, characterization and applications
Magnetic nanomaterials play a pivotal role in both fundamental research and a wide range of technological applications. This dissertation delves into the world of nanomagnetism, exploring various aspects of magnetic iron cobalt (Fe65Co35) structures in the form of nanocubes and nanochains. The …
-
Structural and magnetic properties of erbium thin films and Er/Y superlattices
"The magnetic and structural properties of crystalline erbium thin films and Er /Y superlattices, grown by Molecular Beam Epitaxy, have been analyzed by x-ray scattering, bulk magnetization measurements and neutron diffraction. By comparing the data for the two systems, the effects of the …
-
Granular Alloy Film Synthesis Using Ionized Cluster Beam Deposition
… and the production of nanoclusters and their magnetic behavior. Films are grown by simultaneous deposition of ionized nanoclusters from a beam and of atoms from an evaporation source. The resultant films are of granular structure; that is, they have clusters of nanometer size embedded in a …
-
Interaction Effects in Nickel Nanowires Arrays
Systems of magnetic nanowires are considered strong candidates in many technological applications as microwave filters, sensors or devices for data storage. Because of their strong potential as candidates in such applications they became lately the object of many studies. However, due to the very …
-
Modulation of the Magnetic Properties of Aqueous Metal Ions and the Bioelectrodynamic Effects on Cancerous and Noncancerous Cells
… Transfer Science (CETS) system modulates the magnetic behavior of aqueous metal ions by applying direct current (DC) with a Lorenz force to a hypotonic saline solution. This treated solution was then used to make growth media for cancerous and noncancerous cell lines in vitro. Exposure of …
-
Modelagem constitutiva de ligas magnéticas com memória de forma
Magnetic shape memory alloys (MSMAs) have the ability to deform under thermo, mechanical or magnetic fields actuation, offering the option of contactless control for high excitation frequencies. These characteristics make MSMAs a potential candidate for a new generation of sensors and actuators …
-
Fabrication, characterization, and micromagnetic analysis of lithographically defined particle arrays for applications in data storage
In this thesis, the magnetic behavior of nanostructured ferromagnetic particle arrays are studied by experiments and numerical micromagnetics for ultra-high-density data storage applications. 1 00nm or 200nm period arrays of nanostructured nickel, cobalt, and cobalt phosphorus are fabricated by the …
-
Fabrication and characterization of nanostructured magnetic particles for applications in data storage
Arrays of nanostructured magnetic particles ('nanomagnets') have potential applications in ultra-high-density data storage devices and dynamic magnetic memories, and are model systems for the study of magnetic phenomena at deep sub-micron length scales. We use interference lithography to pattern …
-
Síntese de nanopartículas de magnetita via decomposição térmica em meio não-aquoso
… size, morphology, crystal structure and magnetic behavior. Finally, the introduction of hydroxyl groups on the nanoparticles surface was analyzed besides its employment in the polymer production with OH radicals. The obtained materials were characterized by XRD, DLS, VSM, TEM, TG and DSC …
-
An analytic solution for magnetization distribution in multigrain ferromagnetic materials in an applied magnetic field
The magnetic behavior of a material is governed by the variation in anisotropy direction from grain to grain as well as the changes in ferromagnetic parameters at grain boundaries and other defect regions. For example, transmission electron microscopy results show that chromium segregation occurs …
-
Operando Characterization of Lithium-Ion Batteries using Lab-Scale X-ray Emission/Absorption Spectroscopy
… and Kβ fluorescence is utilized to explore the magnetic behavior of LCO cathodes in the first 10% of lithium removal along with K-edge XAFS for oxygen and cobalt to investigate local and electronic structure changes.
-
Magnetic Images & A Novel Stable Ferro-Magnetic Suspension
… for their spectacular demonstrations of diamagnetically levitated living animals. My MS research is an investigation to develop a novel magnetic suspension capable of operating under ambient conditions without any cryogenics. The physical problem is to freely suspended an object, the proof …
-
Fabrication and characterization of novel nanostructures based on block copolymer lithography
… for pattern transfer. Rings are useful in the magnetic applications, quantum devices, and biosensors. Square symmetry array, which is not found in diblock copolymers, has applications in via formation, magnetic patterned media, and other applications. Besides, we examine the magnetic behavior …
-
An investigation of the nickel (II) and cobalt (II) complexes employing pentadentate ligands derived from salicylaldehyde and bis (3,3'- aminopropyl) ether or sulfide
… analysis, mass spectra, infrared spectra, magnetic susceptibility measurements, and ultraviolet-visible-near infrared spectra. In the solid state the nickel(II) complexes, Ni(X-SALDAPE) and Ni(X-SALDAPS), where X = H, 5-Br, 3-(CH₃)₂CH, or 3-CH₃O, are speculated as pseudo-square planar or …
-
g-factors for ternary crystals of groups iii and v
… There is an increasing interest in knowing the magnetic behavior of different semiconductor materials, due to advances in the domain of spintronics. The g-factors were calculated for the conduction electrons, since they have the greatest contribution to the magnetic properties of the crystal. …
Page 1 of 3