# IEEE Transactions on Magnetics

## Filter Results

Displaying Results 1 - 25 of 26
• ### [Front cover]

Publication Year: 2010, Page(s): C1
| PDF (183 KB)
• ### IEEE Transactions on Magnetics publication information

Publication Year: 2010, Page(s): C2
| PDF (39 KB)

Publication Year: 2010, Page(s):1133 - 1134
| PDF (61 KB)
• ### Dependence of Transverse Domain Wall Dynamics on Permalloy Nanowire Dimensions

Publication Year: 2010, Page(s):1135 - 1138
Cited by:  Papers (12)
| | PDF (280 KB) | HTML

Micromagnetic modeling was used to investigate transverse domain wall propagation through Permalloy nanowires of width, w, between 10 and 120 nm and thickness, T, between 2 and 20 nm. The transverse wall mobility below Walker breakdown, ??, and Walker breakdown field, H w, depended on the exact wire dimensions, rather than simply a function of w/T, as suggest... View full abstract»

• ### Magnetic Anisotropy Dispersion With Exchange Energy in Soft Ferromagnetic Thin Films

Publication Year: 2010, Page(s):1139 - 1142
Cited by:  Papers (6)
| | PDF (183 KB) | HTML

In ferromagnetic thin films, the effect of the magnetic anisotropy dispersion on the quasi-static susceptibility measured under a static magnetic field is shown. An approach is presented to estimate the anisotropy distribution both in angle and intensity from static and dynamical magnetic measurements. Because the transverse biased susceptibility is not fully described by the single anisotropy mod... View full abstract»

• ### Microwave Permeability and Tunable Ferromagnetic Resonance in Cobalt Nanowire Arrays

Publication Year: 2010, Page(s):1143 - 1146
Cited by:  Papers (6)
| | PDF (678 KB) | HTML

A simple theoretical analysis indicates that high permeability is possible in nanowire arrays with the magnetocrystalline anisotropy comparable to the demagnetization energy and its easy axis perpendicular to the nanowire. Both conditions can be satisfied in Co nanowire arrays. With proper fabrication conditions, we have fabricated Co nanowire arrays with crystalline easy axis perpendicular to the... View full abstract»

• ### Three-Dimensional Magnetic Field Numerical Calculation by Equivalent $Bhbox{–}H$ Method for Magnetic Field Mitigation

Publication Year: 2010, Page(s):1147 - 1154
Cited by:  Papers (6)
| | PDF (1564 KB) | HTML

The 3-D magnetic field numerical analysis of a full-scale magnetic shielding room is advantageously performed by using the equivalent B-H method. In the proposed numerical method, the magnetic anisotropy and the nonlinearity due to material magnetic saturation are taken into account, by directly introducing the magnetization characteristics of the considered materials. An equivalent element, which... View full abstract»

• ### Calculation of the Error in the Zero-Crossing Method of Computing the Magnetic Thermal Fluctuation

Publication Year: 2010, Page(s):1155 - 1158
| | PDF (410 KB) | HTML

The concept of the fluctuation field has been widely used to characterize thermal properties of magnetic materials; in particular, the characterization of aftereffect. The Preisach-Arrhenius method has been used successfully to determine the fluctuation field based on aftereffect curves from different holding fields. An approximate method used to determine the fluctuation field, the zero-crossing ... View full abstract»

• ### Magnetostatic Analysis Using Implicit Boundary Finite-Element Method

Publication Year: 2010, Page(s):1159 - 1166
Cited by:  Papers (6)
| | PDF (785 KB) | HTML

The implicit boundary finite-element method avoids the need for generating conforming mesh by using structured mesh for the analysis. A structured mesh (also referred to here as a grid) is a nonconforming mesh that is made up of regular shaped elements (rectangles for 2-D or cuboids for 3-D) and is easier to generate than traditional finite-element mesh. The geometry of the analysis domain is repr... View full abstract»

• ### Analysis and Optimization of a New 2-D Magnet Array for Planar Motor

Publication Year: 2010, Page(s):1167 - 1171
Cited by:  Papers (28)
| | PDF (1684 KB) | HTML

This paper presents a new 2-D permanent-magnet array for a planar motor, in which the angle between the magnetization directions of any two adjacent magnets is 45??. The harmonic model for flux density distribution of the array is solved by the scalar magnetic potential equation and validated by the finite-element method. An analytical model for real-time control is derived by taking the first har... View full abstract»

• ### Sensitivity Formulation Including Velocity Effects for Electromagnetic Induction Systems

Publication Year: 2010, Page(s):1172 - 1176
Cited by:  Papers (18)
| | PDF (381 KB) | HTML

Sensitivity formulation and calculation is an important task in several electromagnetic induction systems, notably those used for measurement, nondestructive testing (NDT), and inductive imaging systems such as magnetic induction tomography (MIT). Previously, the sensitivity formulation used in these cases did not consider the velocity of the objects being imaged as these are considered to be stat... View full abstract»

• ### Convexity-Oriented Mapping Method for the Topology Optimization of Electromagnetic Devices Composed of Iron and Coils

Publication Year: 2010, Page(s):1177 - 1185
Cited by:  Papers (15)  |  Patents (2)
| | PDF (680 KB) | HTML

In order to perform parameter or shape optimizations, an initial topology is required which affects the final solution. This constraint is released in topology optimization methods. They are based on a splitting of the design space into cells, in which they attempt to distribute optimally predefined materials. In topology optimization, a lack of convexity has already been observed by several autho... View full abstract»

• ### Resonance on Coils Excited by Square Waves: Explaining Tesla Transformer

Publication Year: 2010, Page(s):1186 - 1192
Cited by:  Papers (5)
| | PDF (372 KB) | HTML

In this paper, effects of induced electromotive force (EMF) on coils excited by square waves are shown, as well as how these influence resonance phenomena. The work was based on experimental results, using planar coils and inner ring coils. A priori, the resonance is presented as effects of parasitic capacitances on coils, which through inclusion of external capacitances, is established that the p... View full abstract»

• ### A Fast Forward Problem Solver for the Reconstruction of Biological Maps in Magnetic Induction Tomography

Publication Year: 2010, Page(s):1193 - 1202
Cited by:  Papers (5)
| | PDF (1268 KB) | HTML

The magnetic induction tomography (MIT) image reconstruction is a distributed parameter estimation problem normally solved iteratively, where each iteration engages several 3-D harmonic eddy-current problems. These calculations are the main time-consuming process in the MIT reconstruction. In this paper, an approach to accelerate the resolution of a set of similar eddy-current problems to be used ... View full abstract»

• ### Magnetocardiography Signal Reconstruction With Reduced Source Space Based on Current Source Variance

Publication Year: 2010, Page(s):1203 - 1207
Cited by:  Papers (9)
| | PDF (702 KB) | HTML

In this study we use magnetocardiogram (MCG) signals to perform the current source reconstruction of the signal generators. The source model used is a distributed source model that allows visualizing the current flow in the human heart. The heart volume is divided into voxels, each one being the site of one current dipole that has varying orientation and magnitude. We then perform a variance analy... View full abstract»

• ### High Recording Density Tape Using Fine Barium-Ferrite Particles With Improved Thermal Stability

Publication Year: 2010, Page(s):1208 - 1211
Cited by:  Papers (17)  |  Patents (1)
| | PDF (518 KB) | HTML

The effects of reducing barium-ferrite magnetic particle volume have been studied. We optimized barium-ferrite substitution elements and their amount and demonstrated thermal stability for very fine particles of the size 1.5 ?? 103 nm3. Using a giant magnetoresistive (GMR) head with a 0.2 ??m read track width, test tape containing these fine particles exhibited a bit error ra... View full abstract»

• ### Simulation of Erase After Write on 2.4 T FeCo Solid Pole Writer

Publication Year: 2010, Page(s):1212 - 1219
Cited by:  Papers (7)  |  Patents (4)
| | PDF (2105 KB) | HTML

We have developed a multiscale fast Fourier transform (FFT) based micromagnetic model to simulate erase after write (EAW) for a 2.4 T FeCo solid pole writer. The simulated remnant state of the writer showed vortices at the pole tip, break and paddle regions that qualitatively match an experimental MFM image. Dynamic responses show that EAW worsens with a longer breakpoint. Sensitivity of EAW with ... View full abstract»

• ### A Factorization Approach to Sensitivity Loop Shaping for Disturbance Rejection in Hard Disk Drives

Publication Year: 2010, Page(s):1220 - 1227
Cited by:  Papers (7)
| | PDF (961 KB) | HTML

This paper investigates a factorization approach to sensitivity loop shaping for disturbance rejection in hard disk drives (HDDs). The advantage of the factorization approach is that the system sensitivity function can be expressed explicitly in terms of a unique design parameter. This greatly simplifies the control design process to make the system sensitivity function match a chosen target sensi... View full abstract»

• ### Optimization of Magnetic Pole Shifting to Reduce Cogging Torque in Solid-Rotor Permanent-Magnet Synchronous Motors

Publication Year: 2010, Page(s):1228 - 1234
Cited by:  Papers (26)
| | PDF (570 KB) | HTML

In this paper, the method of magnetic poles shifting was combined with optimization method to reduce cogging torque in solid-rotor permanent-magnet synchronous motors. Although the finite-element method (FEM) can calculate the cogging torque accurately, to find the peak value of cogging torque, the cogging torque for different relative positions between permanent magnets and slots must be calculat... View full abstract»

• ### Optimal Split Ratio in Fractional-Slot Interior Permanent-Magnet Machines With Non-Overlapping Windings

Publication Year: 2010, Page(s):1235 - 1242
Cited by:  Papers (24)
| | PDF (1626 KB) | HTML

The split ratio has been optimized for the maximum torque density when the air-gap flux density is fixed in existing papers. However, the air-gap flux density can vary with the split ratio significantly in interior permanent-magnet (IPM) machines due to flux focusing. Therefore, an optimal air-gap flux density may exist, together with the optimal split ratio, for the maximum torque in IPM machines... View full abstract»

• ### Performance Evaluation and Thermal Fields Analysis of Induction Motor With Broken Rotor Bars Located at Different Relative Positions

Publication Year: 2010, Page(s):1243 - 1250
Cited by:  Papers (22)
| | PDF (1559 KB) | HTML

In this paper, the influences of broken bars located at different relative positions in an induction motor are presented. In this investigation, a finite-element model of the squirrel-cage induction motor is developed. Both thermal and electromagnetic analysis of the induction motor operating in conditions of healthy and broken bars fault are carried out, and operating performance and thermal fiel... View full abstract»

• ### A Novel Octagonal Wound Core for Distribution Transformers Validated by Electromagnetic Field Analysis and Comparison With Conventional Wound Core

Publication Year: 2010, Page(s):1251 - 1258
Cited by:  Papers (19)
| | PDF (1602 KB) | HTML

This paper analyzes a novel configuration of transformer core, called octagonal wound core (OWC), and shows the minimization of the excitation current and the reduction of the eddy-current losses. The OWC is compared with the conventional wound core (CWC) configuration. The comparison is based on two-dimensional and three-dimensional finite-element method (FEM) simulations, taking into account the... View full abstract»

Publication Year: 2010, Page(s): 1259
| PDF (320 KB)

Publication Year: 2010, Page(s): 1260
| PDF (291 KB)
• ### IEEE Magnetics Society Information

Publication Year: 2010, Page(s): C3
| PDF (30 KB)

## Aims & Scope

IEEE Transactions on Magnetics publishes research in science and technology related to the basic physics and engineering of magnetism, magnetic materials, applied magnetics, magnetic devices, and magnetic data storage.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Pavel Kabos
National Institute of Standards and Technology