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Showing 1 to 20 of 29 for “"Magnetic State"”.
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Determination of the Magnetic Structure of the Antiferromagnetic State of the Organic Superconductor Kappa-(bedt)(2)copper Dicyanamide Chloride Using Nuclear Magnetic Resonance and Magnetometry
… 13C NMR and magnetometer measurements on the magnetic state of the organic superconductor kappa-(BEDT-TTF)2Cu[N(CN) 2]Cl. Various other magnetization and NMR studies have suggested that there is antiferromagnetic ordering of the electron spins in the magnetic state, but the detailed ordering …
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Determination of the Magnetic Structure of the Antiferromagnetic State of the Organic Superconductor k-(BEDT)2Cu[N(CN)2]Cl Using Nuclear Magnetic Resonance and Magnetometry
… 13C NMR and magnetometer measurements on the magnetic state of the organic superconductor k-(BEDT-TTF)2Cu[N(CN)2]Cl. Various other magnetization and NMR studies have suggested that there is antiferromagnetic ordering of the electron spins in the magnetic state, but the detailed ordering was …
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Magnetic Logic Gate Using Ferromagnetic Hexagonal Nanodots
A study of magnetic states of equal-sided hexagonal Permalloy nanodots has been conducted via micromagnetics simulation. With various side length, thickness and interior angle, magnetic state has been characterized for all hexagonal nanodots. A new boundary between single domain and vortex state on …
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Theory of photo-induced ferro-magnetism in dilute magnetic semiconductors
… study of photo-induced ferro-magnetism in dilute magnetic semiconductors. When light is incident on these systems, electrons and holes are created across the band gap. These particles interact with the impurity magnetic moments and mediate ferro-magnetism when temperature is lowered. This is a …
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A combined experimental and computational study of nanopaleomagnetic recorders in meteoritic metal
… has recently been recognised as a stable paleomagnetic recorder. It is found in meteorites containing iron-nickel alloy that have developed the characteristic Widmanst\"atten pattern. However, the close particle proximity and high magnetocrystalline anisotropy of the cloudy zone make it a …
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Brillouin scattering investigation of nanomagnetic structures
… dynamical properties of arrays of vertical ferromagnetic nanowires and nanorings, which show great promise as high-density magnetic storage and sensor devices. Three closely related projects are reported: (1) observation of bulk magnon quantization in Ni nanowires: bulk spin wave quantization has …
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CHARACTERIZING THE QUASI-STATIC AND DYNAMIC RESPONSE OF A NON-CONTACT MAGNETO-ELASTIC TORQUE SENSOR
… to a shaft, stress-induced changes in the magnetic state of Galfenol that was bonded to the shaft were proportional to the applied torque. Building on that work, this thesis investigates strategies to improve both repeatability and the signal to noise ratio of WiMET sensor output. …
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Ionised deposition for the structural control of carbon nickel thin films
… materials due to the wide range of electronic, magnetic and mechanical properties they display. However, traditional deposition techniques are often complex or lead to a poor quality film. Ionised magnetron sputter deposition is a promising development to traditional magnetron sputtering which …
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Studies in Magnetism and Superconductivity under Extreme Pressure
… create new superconductors, change the magnetic state of a material, and induce structural transitions. In Eu metal the strong local-moment magnetism in divalent Eu: 4f<super>7</super>) suppresses superconductivity. Under sufficiently high pressure, Eu is expected to become trivalent and …
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Development and exploration of potential routes of discovery of new superconductors
… and possible superconductors by suppressing ferromagnetic states via chemical substitution and the application of pressure. The ferromagnetism in La(V<sub>>x<sub>Cr<sub>1-x<sub>)Ge<sub>3<sub> was successfully suppressed</p> <p>by pressure, and, in addition, a potential QCP at ambient pressure was …
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Magnetic, thermodynamic and transport properties of the magnetic semiconductor Fe₁₋xCoxS₂ and superconducting LaSb₂
In recent years magnetic semiconductors have attracted a great deal of attention because it is thought that they can be used to generate spin polarized current in spintronics, an emerging field where the spin degree of freedom of charge carriers is utilized in microelectronic devices. In this …
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Structural, Electronic and Switching Properties of Metalloporphyrin Molecules on Metal Surfaces
… for investigating the structural, electronic and magnetic properties of three different metalloporphyrins on noble metal surfaces. We studied the adsorption and self-assembly behavior of manganese- tetra-pyridine-porphy-rin (Mn-TPyP) molecules on a Cu(111) surface. The Mn- TPyP molecules align …
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Spin-orbit torque switching of compensated ferrimagnetic cobalt-terbium alloys
… there has been interest in using antiferromagnetically coupled materials instead of ferromagnetic materials to store information. Compared with ferromagnetic materials, antiferromagnetically coupled systems exhibit faster dynamics and are more stable against external magnetic field …
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Magnetisation reversal in permanent magnet materials
… consisting of multi-domain grains in the virgin state, it is suggested that the pinning of domain walls at grain boundaries plays an important role in hindering reversal of magnetised grains. The type of pinning mechanism appears to depend on the initial magnetic state of the material. In the …
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THE SPINTERFACE PROBLEM: AB-INITIO STUDIES OF FE-PHTHLOCYANINE ON TRANTITION-METAL OXIDES.
… electrons form interesting hybrid electronic states that characterize what is commonly called an organic spinterface. The central idea of our study is the possibility of exciting a spin coherent wave inside the substrate through a light-induced excitation of the molecule - in other words, …
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Magnetic noise studies in advanced metal particle tapes
… profiles and noise studies on flexible media. Magnetic profiles of the media were established using anhysteretic techniques derived from Alternating Current (AC) bias analogue recording. The intention of this investigation was to establish processes that could be used to generate non-uniform …
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Pyrochlore spin ice Dy2Ti2O7: Investigating a platform for magnetic monopolar quasiparticles
"Spin ice is a frustrated magnetic state exhibiting a residual entropy in the magnetic degrees of freedom down to the lowest experimentally measured temperatures. The pyrochlore oxide dysprosium titanate (Dy2Ti2O7) supports a spin ice state on its tetrahedral sublattice of dysprosium spins at low …
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Multivariate Analysis for Scanning (Transmission) Electron Diffraction
… the relationship between crystal structure and magnetic state of this material. Shifting focus to SEM data, density-based clustering is applied - for the first time - to indexed electron back-scatter diffraction (EBSD) orientation data, and shown to be an ideal algorithm. The novel use of data …
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Quantum critical matter: Casimir pairing, emergent orders and topological defects
… First, motivated by the recent discovery of a magnetic quantum critical point in hole-doped cuprates, we study the influence of the criticality on the superconducting pairing. We consider a fermion- fermion interaction in a 2D system at a quantum critical point. We found a new physical …
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Magnetic and Structural Instabilities in Cerium Diantimonides under Pressure
… related Kondo lattice materials that are ferromagnetic at ambient pressure, unlike the majority of magnetic cerium compounds. The application of hydrostatic pressure is commonly employed to discover new phases, by continuously tuning a magnetic state, in the limit of low-temperatures, through a …
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