Observation of a large-gap topological-insulator
... Figure 1 | Strong spin–orbit interaction gives rise to a single SS Dirac cone. Theory (see the Methods section) versus experiments. a,b, High-resolution ARPES measurements of surface electronic band dispersion on Bi2 Se3 (111). Electron dispersion data measured with an incident photon energy of 22 e ...
... Figure 1 | Strong spin–orbit interaction gives rise to a single SS Dirac cone. Theory (see the Methods section) versus experiments. a,b, High-resolution ARPES measurements of surface electronic band dispersion on Bi2 Se3 (111). Electron dispersion data measured with an incident photon energy of 22 e ...
11510079-c-A-6.pdf
... term above penalizes sharp changes in the polarization and may be regarded as the energetic cost of forming domain walls. The second term W is the stored energy density (the Landau energy density), which depends on the state variables or order parameters, the strain ε, and the polarization p, and al ...
... term above penalizes sharp changes in the polarization and may be regarded as the energetic cost of forming domain walls. The second term W is the stored energy density (the Landau energy density), which depends on the state variables or order parameters, the strain ε, and the polarization p, and al ...
Ab-initio pulsar magnetosphere: three-dimensional particle-in
... In order to mimic the surface charge injection, we inject neutral plasma everywhere on the star with a rate of 0.2Σ = 0.2(Er (r∗ ) − Ercor (r∗ ))/4π per time step, where Σ is the local surface charge, r∗ is the injection point at the stellar surface, and Ercor is the r-component of the corotation el ...
... In order to mimic the surface charge injection, we inject neutral plasma everywhere on the star with a rate of 0.2Σ = 0.2(Er (r∗ ) − Ercor (r∗ ))/4π per time step, where Σ is the local surface charge, r∗ is the injection point at the stellar surface, and Ercor is the r-component of the corotation el ...
Magnetism - A Blow to Welding
... becomes unstable or is completely blown out causing defective welds and greatly increased welding times. The cost implications of increased welding times or late delivery can be significant. The solution to the problem is to demagnetise the weld preparation to enable welding to proceed. To do this p ...
... becomes unstable or is completely blown out causing defective welds and greatly increased welding times. The cost implications of increased welding times or late delivery can be significant. The solution to the problem is to demagnetise the weld preparation to enable welding to proceed. To do this p ...
Structure and magnetic properties of NIFe/SiO2 and Co/SiO2 nano
... the soft magnetic properties of a metal/insulator nanocomposite magnetic material is to make the exchange coupling between neighboring magnetic grains dominate the demagnetizing and magnetocrystalline anisotropy energies in the material.15 In order to achieve this, the particle size, which is the si ...
... the soft magnetic properties of a metal/insulator nanocomposite magnetic material is to make the exchange coupling between neighboring magnetic grains dominate the demagnetizing and magnetocrystalline anisotropy energies in the material.15 In order to achieve this, the particle size, which is the si ...
Structure and magnetic behaviour of mononuclear and dinuclear Cu(II)/Zn(II) monocarboxylate-pyridine
... magnetic behaviour of these samples were investigated. Copper(II) complexes, which are self-assembled by hydrogen bonding and the π-stacking of mononuclear units, form one-dimensional structures. The use of pyridine as a solvent simplified obtaining single crystals for mononuclear and dinuclear meta ...
... magnetic behaviour of these samples were investigated. Copper(II) complexes, which are self-assembled by hydrogen bonding and the π-stacking of mononuclear units, form one-dimensional structures. The use of pyridine as a solvent simplified obtaining single crystals for mononuclear and dinuclear meta ...
University of Groningen Organic-inorganic hybrids Arkenbout
... Here, the metal ions are octahedrically coordinated by the halogen atoms and these octahedra share their corners to form a perovskite-like sheet. These perovskite layers have a net charge of -2 per formula unit, which is compensated by positively charged RNH3+ ions that are present between the inorg ...
... Here, the metal ions are octahedrically coordinated by the halogen atoms and these octahedra share their corners to form a perovskite-like sheet. These perovskite layers have a net charge of -2 per formula unit, which is compensated by positively charged RNH3+ ions that are present between the inorg ...
Magnetic Refrigeration Assignment
... Laboratory(university of lowa) and astronautics Corporation in the USA have elaborated on this idea, resulting in a number of prototype magnetic refrigerators using metals such as pure gadolium and gadolium alloys such as the active materials. Combining these materials with high applied magnetic fie ...
... Laboratory(university of lowa) and astronautics Corporation in the USA have elaborated on this idea, resulting in a number of prototype magnetic refrigerators using metals such as pure gadolium and gadolium alloys such as the active materials. Combining these materials with high applied magnetic fie ...
Spin Density Functional Based Search for Half
... values and has very substantial effects in perovskite materials, structural distortions that lower symmetry and alter hopping amplitudes. There is in addition the possibility of ions changing their charge state (determined by differences in site energies and by intra-atomic repulsion). However, thes ...
... values and has very substantial effects in perovskite materials, structural distortions that lower symmetry and alter hopping amplitudes. There is in addition the possibility of ions changing their charge state (determined by differences in site energies and by intra-atomic repulsion). However, thes ...
Medical Physics
... Evacuated glass envelope containing a cathode and an anode Electrons are released from the cathode by thermionic emission and are focussed into a beam and accelerated towards the anode by a very high voltage electric field An incident electron will be slowed down by interacting with the nucleus of a ...
... Evacuated glass envelope containing a cathode and an anode Electrons are released from the cathode by thermionic emission and are focussed into a beam and accelerated towards the anode by a very high voltage electric field An incident electron will be slowed down by interacting with the nucleus of a ...
Inorganic Materials Chemistry Core Module 7
... Dimensionality and porosity Dimensionality is important in understanding the properties of solids. S Ti S S Ti S S Ti S ...
... Dimensionality and porosity Dimensionality is important in understanding the properties of solids. S Ti S S Ti S S Ti S ...
Ligand Field Strengths and Oxidation States from Manganese L
... hole." A similar argument would appear to hold for the K-edge splittings, yet these appear comparable to the optical values. Further study of the relationship between X-ray and optical splittings is clearly needed. The branching ratio of L3 edge intensity to total line strength, 1(L3)/!(L3 L2), decr ...
... hole." A similar argument would appear to hold for the K-edge splittings, yet these appear comparable to the optical values. Further study of the relationship between X-ray and optical splittings is clearly needed. The branching ratio of L3 edge intensity to total line strength, 1(L3)/!(L3 L2), decr ...
Inorganic Materials Chemistry Lecture Notes
... Silicon (group 14) is not a good conductor of electricity. If Si is doped with small amounts (1%) of P (group15) the conductivity increases significantly. In effect after forming bonds to silicon the remaining electron from P acts as a conduction electron. Non-stoichiometry and solid solutions In no ...
... Silicon (group 14) is not a good conductor of electricity. If Si is doped with small amounts (1%) of P (group15) the conductivity increases significantly. In effect after forming bonds to silicon the remaining electron from P acts as a conduction electron. Non-stoichiometry and solid solutions In no ...
Nd2Fe14B Crystal Structure
... 1 of Reference 10;10 the FeFej2 bond lengths range from 2.6 to 2.8 Å, quite comparable with the FeFec distances in R2Fe17. Half of the hexagons in the R2TM17 lattice do not have a c atom above or below to complete the net, and the Feh atoms have only one Fec neigh bor. In contrast, all h ...
... 1 of Reference 10;10 the FeFej2 bond lengths range from 2.6 to 2.8 Å, quite comparable with the FeFec distances in R2Fe17. Half of the hexagons in the R2TM17 lattice do not have a c atom above or below to complete the net, and the Feh atoms have only one Fec neigh bor. In contrast, all h ...
X-rays - TheWorldaccordingtoHughes
... A quantitative measure of the loss of edge detail which is due to geometric properties of the object and imaging system and not due to image noise or X-ray scatter. It is usually expressed as the width of the band of changing density or brightness arising from a sudden change in the intensity of the ...
... A quantitative measure of the loss of edge detail which is due to geometric properties of the object and imaging system and not due to image noise or X-ray scatter. It is usually expressed as the width of the band of changing density or brightness arising from a sudden change in the intensity of the ...
Document
... When a material makes the transition from the normal to superconducting state, it actively excludes magnetic fields from its interior; this is called the Meissner effect. This constraint to zero magnetic field inside a superconductor is distinct from the perfect diamagnetism which would arise from i ...
... When a material makes the transition from the normal to superconducting state, it actively excludes magnetic fields from its interior; this is called the Meissner effect. This constraint to zero magnetic field inside a superconductor is distinct from the perfect diamagnetism which would arise from i ...
3D Modeling of Electromagnetic-Thermal Phenomena in Induction
... are necessary in the conducting regions (three components for the electric vector potential T and one component for the magnetic scalar potential Φ). Taking into account that description based on electric vector potential T (in non-conducting regions) is less expensive than that based on magnetic ve ...
... are necessary in the conducting regions (three components for the electric vector potential T and one component for the magnetic scalar potential Φ). Taking into account that description based on electric vector potential T (in non-conducting regions) is less expensive than that based on magnetic ve ...
Local doc file
... A ferromagnetic material such as iron has permanent magnetization when the magnetic moments of its atoms are aligned parallel to each other. Because individual electrons also have an intrinsic alignment of their own angular moments (spins), they can interact with ferromagnets in some unusual ways. F ...
... A ferromagnetic material such as iron has permanent magnetization when the magnetic moments of its atoms are aligned parallel to each other. Because individual electrons also have an intrinsic alignment of their own angular moments (spins), they can interact with ferromagnets in some unusual ways. F ...
Magnetic Materials Background: 7. Hysteresis
... If the size of a magnetic particle/grain decreases then there is a critical size below which the decrease in magnetostatic energy by splitting into two domains is less than the increase in energy due to the introduction of the domain wall. Particles that are below this critical size are known as “s ...
... If the size of a magnetic particle/grain decreases then there is a critical size below which the decrease in magnetostatic energy by splitting into two domains is less than the increase in energy due to the introduction of the domain wall. Particles that are below this critical size are known as “s ...
Preparation methods for bulk materials
... by analysing the evolution of the δJ values obtained from recoil loops measured during the demagnetisation process in dependence on composition, temperature and grain size. Recently significant progress has been made in the development of high temperature 2:17type Sm(CobalFevCuyZrx)z magnets and ope ...
... by analysing the evolution of the δJ values obtained from recoil loops measured during the demagnetisation process in dependence on composition, temperature and grain size. Recently significant progress has been made in the development of high temperature 2:17type Sm(CobalFevCuyZrx)z magnets and ope ...
Computational Alchemy @Condensed Matter Theory group
... and circuits involving quantized energy levels or the interaction of quantized spins …..” ...
... and circuits involving quantized energy levels or the interaction of quantized spins …..” ...
estimation of subsurface residual stress depth profiles via wideband
... Surface residual stresses in ferromagnetic materials can be evaluated non-destructively with Magnetic Barkhausen noise (MBN). Residual stresses directly affect the magnetostrictive energy of a sample, thus altering the way that magnetic domain walls move; this results in a quantifiable change in the ...
... Surface residual stresses in ferromagnetic materials can be evaluated non-destructively with Magnetic Barkhausen noise (MBN). Residual stresses directly affect the magnetostrictive energy of a sample, thus altering the way that magnetic domain walls move; this results in a quantifiable change in the ...
Unveiling the quantum critical point of an Ising chain
... Quantum phase transitions occur at zero temperature upon variation of some nonthermal control parameters. The Ising chain in a transverse field is a textbook model undergoing such a transition, from ferromagnetic to paramagnetic state. This model can be exactly solved by using a Jordan-Wigner transf ...
... Quantum phase transitions occur at zero temperature upon variation of some nonthermal control parameters. The Ising chain in a transverse field is a textbook model undergoing such a transition, from ferromagnetic to paramagnetic state. This model can be exactly solved by using a Jordan-Wigner transf ...
Microwave tunability in a GaAs-based multiferroic heterostructure: Co MnAl/GaAs/PMN-PT
... Magnetoelectric 共ME兲 materials have recently received much attention for both their fundamental physical properties and potential to enable a new generation of electric-field tunable electronic devices.1,2 An increasing interest is devoted to a class of materials referred to as multiferroics, which ...
... Magnetoelectric 共ME兲 materials have recently received much attention for both their fundamental physical properties and potential to enable a new generation of electric-field tunable electronic devices.1,2 An increasing interest is devoted to a class of materials referred to as multiferroics, which ...
x - Angelfire
... • This is expected: percolation is a critical phenomenon. Change in orbital-ordering also leads to change in the crystal dimensions: • Hypothesis: upon introducing a Ga3+ ion, neighbouring x and y Mn3+ orbitals in the above/below planes flip into z direction. Orthorhombic Strain in LaMn1-xGaxO3 @ T ...
... • This is expected: percolation is a critical phenomenon. Change in orbital-ordering also leads to change in the crystal dimensions: • Hypothesis: upon introducing a Ga3+ ion, neighbouring x and y Mn3+ orbitals in the above/below planes flip into z direction. Orthorhombic Strain in LaMn1-xGaxO3 @ T ...