gradient magnetic layers

Precise Determination of the Temperature Gradients

Cited by: 2

Vertical magnetic field gradient in the photospheric layers ...

Cited by: 12

Bilayer skyrmion dynamics on a magnetic anisotropy

2019-4-8 · The bilayer was constructed by having two magnetic layers separated by a single non-magnetic layer of 0.4 nm thickness which represents a material such as Ru or Ir to antiferromagnetically couple the adjacent ferromagnetic layers. The gradient magnetic anisotropy is formed by varying the values of magnetic anisotropy cell by cell along the slope.

Gradient meter with thin magnetic layer -

1987-10-27 · The known thin magnetic layers, utilized in the gradient meter of the present invention, are of the type of those which are shown in FIG. 1 and comprise essentially on a cylindrical support 1 a magnetic layer 2 having the form of a cylinder of revolution on axis Z and of thickness e. This thin layer 2 is anisotropic, that is, that is possesses ...

(PDF) Micromagnetic Simulations of Magnetization

in Ultra-Thin Cobalt Layers with Gradient Magnetic Anisotropy M. Kisielewski 1 , J. Kisielewski 1 , I. Sveklo 1 , A.Wawro 2 , and A. Maziewski 1 1 Faculty of Physics, University of Bialystok, K ...

Vertical magnetic field gradient in the photospheric ...

Aims: We investigate the vertical gradient of the magnetic field of sunspots in the photospheric layer. Methods: Independent observations were obtained with the Solar Optical Telescope/Spectropolarimeter (SOT/SP) on board the Hinode spacecraft and with the Tenrife Infrared Polarimeter-2 (TIP-2) mounted at the German Vacuum Tower Telescope (VTT).

Magnetic field-enabled co-electrodeposition of

Therefore, another consideration for the enrichment of Y 2 O 3:Eu through enhanced convective flow is the magnetic gradient force , , , , which describes the action of a gradient field, B, on the components of the bath described by their molar magnetic susceptibilities χ mol, k and their molar concentrations, c k: (2) F ∇ B = ∑ k χ m o l ...

Magnetic matrices used in high gradient magnetic ...

2017-1-1 · The magnetic force (F m) acting on a paramagnetic particle of volume (v p) in a magnetic field (H) is given by the function (1) F m = μ o χ v p H ∇ H where μ o is the vacuum permeability, χ is the volume magnetic susceptibility of the particle, and ∇ H is the gradient of the magnetic field at the position of the particle. The magnetic force F m is proportional to the volume of magnetic ...

Gradient Field Generation in a Uniform Gapped Magnet

2004-11-24 · gradient is required such as in a combined function synchrotron [1] or FFAG [2]. In order to generate a gradient field in a constant gapped magnet, a novel method with use of inter-poles is devised. This magnet has not only constant gap but also smaller fringing field compared with a conventional one. Fig. 1 A magnet with gradient field.

Measurement of gradient magnetic field

2006-9-29 · If the magnitude of gradient is 20mT/m, then the layer will have a width of 0.7 mm. The measurement of gradient magnetic field is changed to two measurements of the mean value of induction magnetic field in two positions (± xn). Fig. 2: Selection of exciting layers. The selection of exciting layer is shown in Figure 2.

(PDF) Vertical magnetic field gradient in the

V ertical magnetic field gradient in the photospheric layers of sunspots Jayant Joshi 1 , 2 , Andreas Lagg 1 , Johann Hirzberger 1 , Sami K. Solanki 1 , 3 , and Sanjiv K. T iwari 1 , 4

Vertical magnetic field gradient in the photospheric ...

Aims: We investigate the vertical gradient of the magnetic field of sunspots in the photospheric layer. Methods: Independent observations were obtained with the Solar Optical Telescope/Spectropolarimeter (SOT/SP) on board the Hinode spacecraft and with the Tenrife Infrared Polarimeter-2 (TIP-2) mounted at the German Vacuum Tower Telescope (VTT).

FLAT INSULATION LAYER FOR A MAGNETIC

2018-1-11 · 1. A method for manufacturing an insulation layer for embodiment in a magnetic resonance gradient coil, said method comprising: providing a plate, strip or foil of thermoplastic insulating material to a hot press apparatus; and in said hot press apparatus, three-dimensionally deforming said thermoplastic insulating material of said plate, strip or foil in order to form predetermined local ...

Theory of gradient coil design methods for magnetic ...

The magnetic gradient fields have to be modified at frequencies of up to a few kilohertz for fast imaging, and for the typical inductances of the coils on the range of several hundred microhertz to a millihertz, the voltages required are in excess of 1,500 V. ... coils, and that performance improves as the number of layers increases ...

Separation of Fe3O4 Nanoparticles from Water by ...

2015-1-30 · Nuclear Magnetic Resonance (NMR) relaxometry was explored. This method is based on the registration of the relaxation time T 2 of the NMR echo signal from the hydrogen nuclei in water (H +). The impurities bearing magnetic moment, dispersed in water, influence the local magnetic field gradient near the hydrogen nuclei, which is reflected in a ...

Gradient Field Generation in a Uniform Gapped Magnet

2004-11-24 · gradient is required such as in a combined function synchrotron [1] or FFAG [2]. In order to generate a gradient field in a constant gapped magnet, a novel method with use of inter-poles is devised. This magnet has not only constant gap but also smaller fringing field compared with a conventional one. Fig. 1 A magnet with gradient field.

Fabrication of MnSb/Sb functionally graded materialsby high ...

Mn-89.8wt%Sb alloys were solidified in the absence or presence of high magnetic fields of 8.8 T with various gradients to investigate the effects of high magnetic fields on the structures of the alloys. It was found that both of the two primary phases, i.e. MnSb and Sb ...

Measurement of gradient magnetic field

2006-9-29 · If the magnitude of gradient is 20mT/m, then the layer will have a width of 0.7 mm. The measurement of gradient magnetic field is changed to two measurements of the mean value of induction magnetic field in two positions (± xn). Fig. 2: Selection of exciting layers. The selection of exciting layer is shown in Figure 2.

Superelliptical Insert Gradient Coil with a Field ...

2010-7-15 · However, the magnetic field as well as gradient strength of uniplanar gradient systems falls off nearly exponentially with distance from the coil surface. As a result, the gradient varies continuously and even an approximately linear region is narrow in the direction of each gradient. Image distortion caused by the nonlinear

Magnetic susceptibility inversion method with full

Full tensor magnetic gradient measurements are available nowadays. These are essential for determining magnetization parameters in deep layers. Using full or partial tensor magnetic gradient measurements to determine the subsurface properties, e.g., magnetic susceptibility, is an inverse problem. Inversion using total magnetic intensity data is a traditional way. Because of difficulty in ...

Superelliptical Insert Gradient Coil with a Field ...

2010-7-15 · However, the magnetic field as well as gradient strength of uniplanar gradient systems falls off nearly exponentially with distance from the coil surface. As a result, the gradient varies continuously and even an approximately linear region is narrow in the direction of each gradient. Image distortion caused by the nonlinear

FLAT INSULATION LAYER FOR A MAGNETIC

2018-1-11 · 1. A method for manufacturing an insulation layer for embodiment in a magnetic resonance gradient coil, said method comprising: providing a plate, strip or foil of thermoplastic insulating material to a hot press apparatus; and in said hot press apparatus, three-dimensionally deforming said thermoplastic insulating material of said plate, strip or foil in order to form predetermined local ...

DE102006036833B4 - Gradient coil system and

Gradient coil system (1), for a magnetic resonance tomograph with a layer structure (2) comprising a gradient coil layer (3, 4, 12, 17, 18, 19) and a cooling layer (8 ...

Longitudinal gradient coil optimization in the

The gradient current overshoot and axial coil positions in both the primary and secondary gradient layers were then optimized to account for the presence of secondary magnetic fields in the imaging volume. The leakage fields were also minimized during the same optimization process. RESULTS Verification of the Computational Method

Multi-layer Actively Shielded Gradient Coils

2002-4-30 · transverse magnetic field gradient coils [1,2]. Here we extend this work to the design of actively screened, multi-layer gradient coils. Method The design method that was used was an extension of Turner's "Target Field Approach" [3]. A current distribution was defined over a number of equally spaced layers, and in each layer is composed of a ...

Multi-Layer Transverse Gradient Coils

1999-5-5 · the nutnber of layers. The “cut” based coils have higher efficiency than those cotnposed of discrete wires. For both types of coil the inductance increases with the mmtber of layers. A two-layer, wire-wound, coil ltas been built to test the feasibility of cottstructing and operating multi-layer transverse gradient

Understanding Magnetic Field Gradient Effect From a

2016-6-26 · layers and side layers @2,3#. Quite different from Hartmann-type problems where the closure of induced currents is in the plane perpendicular to streamwise, the currents induced by a potential variation of velocity or magnetic field along flow direction en-circle in the plane parallel to stream-wise. Some studies on the

Magnetic susceptibility inversion method with full

Full tensor magnetic gradient measurements are available nowadays. These are essential for determining magnetization parameters in deep layers. Using full or partial tensor magnetic gradient measurements to determine the subsurface properties, e.g., magnetic susceptibility, is an inverse problem. Inversion using total magnetic intensity data is a traditional way. Because of difficulty in ...

Magnets for the recycling industry | Goudsmit

Continuous separation with permanent 8,000 gauss head roller magnet. The shallow but very powerful magnetic field is suitable for thin or mono-layers. Placement after a vibratory chute or conveyor. Suitable for dry product flow only.

The SuperG Gradient Coil - GE Healthcare

2017-4-27 · A current in a magnetic field induces a force on the wire, due to Lorentz’s Law, proportional to the cross product with the magnetic field. In gradient design, the radial component of the main magnetic field induces a net force on the gradient coil for each axis. The net force on the gradient will then cause vibration when the gradient is pulsed.