# IEEE Transactions on Magnetics

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Displaying Results 1 - 25 of 33
• ### [Front cover]

Publication Year: 2006, Page(s): c1
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• ### IEEE Transactions on Magnetics publication information

Publication Year: 2006, Page(s): c2
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Publication Year: 2006, Page(s):3633 - 3634
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• ### Complex Permittivity and Permeability of Co$_2$U (Ba$_4$Co$_2$Fe$_36$O$_60$) Hexaferrite Bulk and Composite Thick Films at Radio and Microwave Frequencies

Publication Year: 2006, Page(s):3635 - 3640
Cited by:  Papers (21)
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We measured dielectric, magnetic, and microwave properties of Co 2U hexaferrite (Ba4Co2Fe36O 60) polycrystalline bulk and composite thick film samples, and studied the effect of annealing temperature on phase formation and microstructure. We synthesized the bulk samples from a precursor prepared by the citrate method. The values of dielectric ... View full abstract»

• ### Flux-Closure Magnetic States in Triangular Cobalt Ring Elements

Publication Year: 2006, Page(s):3641 - 3644
Cited by:  Papers (12)
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Ferromagnetic ring elements on the micrometer and submicrometer scale exhibit flux-closure magnetic vortex states in an intermediate step of their magnetization reversal. These clockwise or counterclockwise flux-closure states are of interest for applications that encode binary information in magnetic elements. Here, we study the magnetization reversal process of triangular cobalt rings made by e-... View full abstract»

• ### Evaluating the Permeability Distribution of a Layered Conductor by Inductance Spectroscopy

Publication Year: 2006, Page(s):3645 - 3651
Cited by:  Papers (10)
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This paper presents an inverse method for determining the permeability distribution of a flat, layered conductor by using a multifrequency electromagnetic sensor. It discusses the use of spectroscopic techniques to extract depth profiles and examine more fully the internal structure of the test piece. The forward solution for a small right-cylindrical air-cored coil placed next to a layered conduc... View full abstract»

• ### Magnetization Switching With Nonstandard Dissipation

Publication Year: 2006, Page(s):3652 - 3656
Cited by:  Papers (4)
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We report on our study of magnetization switching in a single-domain ellipsoidal particle. Under the assumption of uniaxial anisotropy collinear with the applied field, we derive an explicit formula for the switching time from the Landau-Lifschitz equation for a class of dissipation mechanisms that includes Gilbert's, dry friction, and others. While some dissipation is essential to finite-time swi... View full abstract»

• ### Bayesian Inference Approach to Particle Size Distribution Estimation in Ferrofluids

Publication Year: 2006, Page(s):3657 - 3660
Cited by:  Papers (6)
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We present an effective direct extraction method for particle size distribution based on Bayesian inference theory with a free-form model. We give an example of the application to the particle size distribution analysis in ferrofluid consisting of cobalt particles in toluene. The method gives a unique solution to the distribution without assuming the shape of the distribution of the particle size View full abstract»

• ### Time-Domain Dyadic Green's Function for an Electric Source in a Conductive Plate

Publication Year: 2006, Page(s):3661 - 3668
Cited by:  Papers (2)
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We have determined the quasi-static time-domain dyadic Green's function for an electric source in a conductive plate for use in electric field integral equations. Starting with a frequency-domain representation, we constructed the dyadic kernel from electric and magnetic scalar potentials defined with respect to a preferred direction normal to plate. The final time-domain expression has three part... View full abstract»

• ### Theoretical Lower Error Bound for Comparative Evaluation of Sensor Arrays in Magnetostatic Linear Inverse Problems

Publication Year: 2006, Page(s):3669 - 3673
Cited by:  Papers (3)
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We introduce a theoretical lower error bound for solutions to magnetostatic linear inverse problems and we propose it as a figure of merit for the comparative evaluation of sensor arrays. With the help of the proposed error bound, we demonstrate the superiority of three-axial biomagnetic sensor arrays applying truncated singular value decomposition analysis to a kernel matrix computed from boundar... View full abstract»

• ### A New Approach for Finite-Element Modeling of Hysteresis and Dynamic Effects

Publication Year: 2006, Page(s):3674 - 3681
Cited by:  Papers (2)
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Macroscopic behavior of ferromagnetic materials can be considered as the resultant of three phenomena: hysteresis, eddy current, and excess loss. Hysteresis is the behavior of the material under quasi-static variation of magnetic field. Eddy-current and excess losses are dependent on the rate of field variation and are evident in the fast variation of the magnetic field, so they are called dynamic... View full abstract»

• ### Calculation and Analysis of the Magnetic Force Acting on a Particle in the Magnetic Field of Separator. Analysis of the Equations Used in the Magnetic Methods of Separation

Publication Year: 2006, Page(s):3682 - 3693
Cited by:  Papers (18)  |  Patents (1)
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This paper presents the derivation of equation for calculating the magnetic force acting on a paramagnetic ball situated in a region of a nonuniform magnetic field. We suggest the method of its extrapolation to the case of a nonlinear medium-the case of a ferromagnetic ball found under the influence of the magnetic field which is varying in a certain properly defined range. An experimental setting... View full abstract»

• ### Recurrent Radial Basis Function Network-Based Fuzzy Neural Network Control for Permanent-Magnet Linear Synchronous Motor Servo Drive

Publication Year: 2006, Page(s):3694 - 3705
Cited by:  Papers (24)
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We propose a recurrent radial basis function network-based (RBFN-based) fuzzy neural network (FNN) to control the position of the mover of a field-oriented control permanent-magnet linear synchronous motor (PMLSM) to track periodic reference trajectories. The proposed recurrent RBFN-based FNN combines the merits of self-constructing fuzzy neural network (SCFNN), recurrent neural network (RNN), and... View full abstract»

• ### Mitigation of Torque Ripple in Interior Permanent Magnet Motors by Optimal Shape Design

Publication Year: 2006, Page(s):3706 - 3711
Cited by:  Papers (54)  |  Patents (1)
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Optimal shape design of an interior permanent-magnet (IPM) synchronous motor can substantially reduce its torque pulsation. However, the shape design variations should be feasible and practical. We report on an optimal shape design obtained by drilling small circular holes in the rotor. We found that an optimal location and radius of the holes effectively suppresses the torque pulsation of the IPM... View full abstract»

• ### A Comparative Analysis of Two Test Methods of Measuring$d$- and$q$-Axes Inductances of Interior Permanent-Magnet Machine

Publication Year: 2006, Page(s):3712 - 3718
Cited by:  Papers (74)
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The interior permanent-magnet (IPM) machine is used in many industrial drives. In order to analyze performance and to design efficient and fast controllers, accurate knowledge of machine parameters such as d- and q-axes inductances is essential. Although there are a number of methods available to calculate these inductances, none of them is considered standard. Accuracy levels of all these methods... View full abstract»

• ### Modeling of Planar Spiral Inductors Between Two Multilayer Media for Induction Heating Applications

Publication Year: 2006, Page(s):3719 - 3729
Cited by:  Papers (38)
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We present an analytical model of the equivalent impedance of an n-turn planar winding sandwiched between top and bottom multilayer media. Although the model's general and compact notation is valid for all systems involving magnetic dipoles and stratified media, perhaps its main application is domestic induction heating systems. The proposed model is based on the vector potential solution of a sin... View full abstract»

• ### Fast Calculation of Field Currents and Reactances for Doubly Fed Generators With Rotor Duct Pieces

Publication Year: 2006, Page(s):3730 - 3736
Cited by:  Papers (6)
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Doubly fed generators have been used as adjustable-speed pumped-storage generator motors and wind turbine generators. Accurate determination of field currents and reactances is important for the design of these machines. We propose a calculation method to obtain the field currents and reactances of machines with rotor duct pieces under any steady-state balanced load condition. The method links two... View full abstract»

• ### A Parametric Study of Magneto-Optic Imaging Using Finite-Element Analysis Applied to Aircraft Rivet Site Inspection

Publication Year: 2006, Page(s):3737 - 3744
Cited by:  Papers (29)
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Magneto-optic/eddy current imaging (MOI) has become increasingly popular for inspecting aging aluminum airframes for cracks and corrosion due to its accuracy, reliability, and ease of use. As inspection requirements change, modifications to the MOI system must be made to improve sensitivity and resolution to reliably detect smaller and/or deeper defects in the aircraft structure. Incorporating suc... View full abstract»

• ### Optimal Narrow-Band Disturbance Filter for PZT-Actuated Head Positioning Control on a Spinstand

Publication Year: 2006, Page(s):3745 - 3751
Cited by:  Papers (25)  |  Patents (1)
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Narrow-band position error at midfrequencies around the open-loop crossover frequency cannot be effectively reduced by using a conventional peak filter, because the attenuation of sensitivity gains has to be traded off with the associated decrease of phase margin. This paper presents a general second-order filter that can reject narrow-band disturbances at any frequency range. The filter zero is d... View full abstract»

• ### Data-Aided Timing Recovery for Recording Channels With Data-Dependent Noise

Publication Year: 2006, Page(s):3752 - 3759
Cited by:  Papers (3)
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In high-density data storage systems, noise becomes highly correlated and data dependent as a result of media noise, channel nonlinearities, and front-end filters. In such environments, conventional timing recovery schemes will exhibit large residual timing jitter and, especially, data-dependent timing jitter. This paper presents a new data-aided timing recovery algorithm for data storage systems ... View full abstract»

• ### Switched Reluctance Machines as Three-Phase AC Autonomous Generator

Publication Year: 2006, Page(s):3760 - 3764
Cited by:  Papers (33)
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The operation of the switched reluctance machine as an autonomous three-phase ac generator is considered. Two circuits are proposed. The generator circuit consists of only capacitors and load supplementary to the generator, but does not contain any power supply. Theoretical approaches for simulation of the three-phase autonomous switched reluctance generator are presented. The influence of the hig... View full abstract»

• ### A Note on &#8220;Signal-to-Noise Ratio Mismatch for Low-Density Parity-Check Coded Magnetic Recording Channels&#8221; by W. Tan and J. R. Cruz

Publication Year: 2006, Page(s):3765 - 3766
Cited by:  Papers (1)
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In this letter, we prove that the minimum signal-to-noise ratio (SNR) threshold of the iterative belief propagation algorithm for a low-density parity-check (LDPC) coded magnetic recording channel is obtained when the SNR mismatch factor is half the ratio of variance to mean for the Gaussian distribution at the channel output. This result was first observed by Tan and Cruz empirically View full abstract»

• ### Structural and Magnetic Properties of Sm$_3$(Fe$_1-rm x$Co$_rm x$)$_27.7$Ti$_1.3$

Publication Year: 2006, Page(s):3767 - 3769
Cited by:  Papers (1)
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The structure and magnetic properties of Sm3(Fe1-x Cox)27.7Ti1.3 compounds, with x ranging from 0 to 0.4, have been investigated by means of X-ray powder diffraction and magnetic measurements. The main phase formed was that of Nd3(Fe, Ti)29-type structure (3:29) with a relatively small amount of the ThMn12-type... View full abstract»

• ### The (SmZr)Co$_3$Phase in Sm(CoFeCuZr)$_rm z$Magnets

Publication Year: 2006, Page(s):3770 - 3772
Cited by:  Papers (6)  |  Patents (1)
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Detailed microstructural characterization of magnets and homogenized as-cast alloys, which included X-ray diffraction Rietveld analysis, has indicated that the so-called platelet or lamellae phase is (SmZr)1(CoFeCu)3 with the PuNi3 structure and lattice parameters a~0.5 nm and c~2.4 nm. The structural and magnetic properties of the (SmZr)Co3 phase were i... View full abstract»

• ### Stress Induced Enhancement of Magnetization Reversal Process of DyFeCo Films With Perpendicular Magnetization

Publication Year: 2006, Page(s):3773 - 3775
Cited by:  Papers (7)  |  Patents (1)
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A method to control magnetization reversal in magnetic films with perpendicular magnetic anisotropy was demonstrated in this study. Alloys of rare earth-transition metals (RE-TM) with their extremely large anomalous Hall coefficient and relatively large magnetostriction constants were suitable to observe the stress induced anisotropy using anomalous Hall effect. Stress applied to the RE-TM thin fi... View full abstract»

## Aims & Scope

IEEE Transactions on Magnetics is a peer-reviewed, archival journal in science and technology related to the basic physics and engineering of magnetism, magnetic materials, applied magnetics, magnetic devices, and magnetic data storage. The journal publishes scholarly articles of archival value as well as tutorial expositions and critical reviews of classical subjects and topics of current interest.

Full Aims & Scope

## Meet Our Editors

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