IEEE Transactions on Magnetics

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• [Front cover]

Publication Year: 2008, Page(s): C1
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• IEEE Transactions on Magnetics publication information

Publication Year: 2008, Page(s): C2
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Publication Year: 2008, Page(s):429 - 430
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• Magnetic Anisotropy Dispersion in FeCo Films

Publication Year: 2008, Page(s):431 - 434
Cited by:  Papers (4)
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We report on our study of magnetic and nonmagnetic parameters such as coercivity, anisotropy , magnetic dispersion, and stress on FeCo films of various thicknesses from 25 A to 500 A . We used 10 A Ru or NiFe seed layers for two sets of FeCo films. All films showed so-called hard-axis coercivity rocking, i.e., the hard-axis coercivity exhibits two local minima close to the nominal hard axis. Magne... View full abstract»

• Complex Magnetic Permeability and Dielectric Permittivity of Ferrites in Millimeter Waves

Publication Year: 2008, Page(s):435 - 437
Cited by:  Papers (12)
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We report a first-time study of complex magnetic permeability and dielectric permittivity of 99% pure powdered barium cobalt ferrite (Ba2Co2Fe12O22) and pure solid barium hexaferrite ceramics (BaFe12O19) in a broadband millimeter-wave frequency range. We performed transmittance measurements using a free-space quasi-optical millimete... View full abstract»

• Determination of Complex Permeability of Silicon Steel for Use in High-Frequency Modeling of Power Transformers

Publication Year: 2008, Page(s):438 - 444
Cited by:  Papers (24)
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Information about frequency dependence of complex permeability of silicon steel is a vital input parameter in calculations of transformer winding inductance used for modeling high-frequency behavior (100 Hz-1 MHz). We present two ways of determining small signal complex permeability spectra in frequency domain and compare and discuss the results. The first method is based on an optimization proced... View full abstract»

• Magnetic Force Calculation Between Thin Coaxial Circular Coils in Air

Publication Year: 2008, Page(s):445 - 452
Cited by:  Papers (48)
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We present new and fast procedures for calculating magnetic forces between thin coaxial circular coaxial coils in air. The results are expressed in semianalytical form in terms of the complete elliptical integrals of the first and second kind, Heuman's Lambda function, and a term that must be solved numerically. These expressions are accurate and simple to use for several practical applications. W... View full abstract»

• Noncoaxial Inductance Calculations Without the Vector Potential for Axisymmetric Coils and Planar Coils

Publication Year: 2008, Page(s):453 - 462
Cited by:  Papers (43)
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This paper presents an exact method for calculating the mutual inductance between a general axisymmetric coil and a second planar coil consisting of either a disk coil or a planar loop of essentially arbitrary shape. The approach is based directly on the magnetic field rather than the vector potential . The paper gives detailed results for two circular loops, a circular loop and an elliptic loop, ... View full abstract»

• Plane Wave Model for the Electromagnetic Behavior of SiFe Alloys

Publication Year: 2008, Page(s):463 - 472
Cited by:  Papers (1)
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We present a model that evaluates in the frequency domain the magnetic behavior of laminated SiFe alloys caused by a magnetic field imposed at the material edge. The model is based on plane wave theory describing how an electromagnetic wave penetrates a material. As the nonlinear material with hysteresis can cause harmonic frequency components of the field and induction inside the material, the mo... View full abstract»

• Analysis of the Convergence of the Fixed-Point Method Used for Solving Nonlinear Rotational Magnetic Field Problems

Publication Year: 2008, Page(s):473 - 478
Cited by:  Papers (28)
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The fixed-point method has not been widely used for solving nonlinear electromagnetic field problems, except for the hysteretic problem, for which it is the prevailing method. The method converges stably with a slow rate, exactly opposite to the Newton-Raphson method, which can easily suffer from instability, but which, if it converges, does so remarkably fast. In this paper, we analyze the conver... View full abstract»

• Dipolar Interaction Between Amorphous Microwires

Publication Year: 2008, Page(s):479 - 484
Cited by:  Papers (7)
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We present a model for the description of the magnetostatic interaction between two glass-coated amorphous microwires with positive magnetostriction. We report the results of dipolar field calculations based on this model as well as results of measurements on microwires with their ends separated. We also calculated the switching field variation with fluctuations in microwire dimensions. Experiment... View full abstract»

• Methods of Assembling Large Magnetic Blocks From NdFeB Magnets With a High Value of $({rm BH})_{max}$ and Their Influence on the Magnetic Induction Reached in an Air Gap of a Magnetic Circuit

Publication Year: 2008, Page(s):485 - 491
Cited by:  Papers (2)
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We have investigated methods of assembling large magnetic blocks from NdFeB magnets with a high value of the maximum energy product, and inserting these blocks into magnetic circuits. We found that the magnetic induction in the middle of an air gap between large opposing magnetic blocks in a closed magnetic circuit depends, in addition to other parameters, on the basic method of assembling these m... View full abstract»

• Influence of High Temperature Superconducting Transformer Geometry on Leakage Magnetic Field

Publication Year: 2008, Page(s):492 - 496
Cited by:  Papers (3)
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Leakage magnetic fields in high temperature superconducting (HTS) transformer windings reduce the critical current and increase the ac losses in HTS tapes. Moreover, because of the anisotropic properties of the HTS tapes, the influence of the radial component of the leakage field on critical current and ac losses is much stronger than that of the axial one. For these reasons, leakage magnetic fiel... View full abstract»

• A Miniature Short Stroke Linear Actuator—Design and Analysis

Publication Year: 2008, Page(s):497 - 504
Cited by:  Papers (13)  |  Patents (1)
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We report a newly developed miniature short stroke tubular linear permanent-magnet actuator for robotic applications. Compared to a rotary-to-linear mechanism, the linear actuator has the advantages of efficiency, thrust control, and compact size in generating linear motion. We optimized the electromagnetic force of the actuator analytically by selecting appropriate dimensions and then predicted t... View full abstract»

• Noninvasive Procedure for Improving Efficiency of Three-Phase Induction Motors

Publication Year: 2008, Page(s):505 - 515
Cited by:  Papers (1)
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In developing countries, three-phase squirrel cage induction motors, even though with load equal to their name plate rating, may operate at low efficiencies. This may be because their winding parameters are not optimized for lower running cost. To ascertain the cause, it is necessary to know the stator winding data and compare it with the results of the design. If a deviation exists, the winding i... View full abstract»

• Characterization of Surface-Breaking Cracks Using One Tangential Component of Magnetic Leakage Field Measurements

Publication Year: 2008, Page(s):516 - 524
Cited by:  Papers (20)  |  Patents (1)
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We propose a procedure for full characterization of rectangular surface-breaking cracks based on measurements of only one tangential component of the magnetic field with the magnetic flux leakage (MFL) technique. The parameters of interest include orientation, length, and depth of the cracks. We assume that the length and the depth of the investigated cracks are much larger than the crack width, s... View full abstract»

• Shock Resistance of a Disk-Drive Assembly Using Piezoelectric Actuators With Passive Damping

Publication Year: 2008, Page(s):525 - 532
Cited by:  Papers (5)
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Current dual-stage actuator design uses piezoelectric patches only, without passive damping. In this paper, we propose a dual-stage servo system using enhanced active-passive hybrid piezoelectric actuators. Because they incorporate passive damping, the proposed actuators will improve the existing dual-stage actuators, giving them higher precision and better shock resistance. We report finite-eleme... View full abstract»

• Two-Dimensional Equalization/Detection for Patterned Media Storage

Publication Year: 2008, Page(s):533 - 539
Cited by:  Papers (25)
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Although patterned media storage (PMS) is a promising candidate for ultrahigh-capacity magnetic data storage, as the capacity of PMS increases, the bit error rate (BER) performance of the system is degraded by increased two-dimensional intersymbol interference (2D-ISI), which results from intertrack interference (ITI), intersymbol interference (ISI), and noise. To improve the system performance un... View full abstract»

• Modified Damping Scheduling Proximate Time Optimal Servomechanism for Improvements in Short Strokes in Hard Disk Drives

Publication Year: 2008, Page(s):540 - 546
Cited by:  Papers (8)
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Proximate time-optimal servomechanism (PTOS) has been widely used as a point-to-point motion control algorithm in many control systems, especially in hard disk drives, because of its simplicity and good performance. A great deal of research for improving PTOS has been reported; however, most of it is complex or needs a time-consuming tuning process. Damping scheduling PTOS (DSPTOS), which maintain... View full abstract»

• A New Data Allocation Method for Parallel Probe-Based Storage Devices

Publication Year: 2008, Page(s):547 - 554
Cited by:  Papers (5)
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We present a new data allocation method for probe-based storage devices that use multiple, simultaneously accessed parallel data fields. Our method uses blocks of data of unequal length for allocating a sector in the various storage fields. The amount of data stored in each field depends on the sector's offset from the beginning of the allocation round and on the storage field used. Numerical resu... View full abstract»

Publication Year: 2008, Page(s): 555
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• Order form for reprints

Publication Year: 2008, Page(s): 556
| PDF (337 KB)
• IEEE Magnetics Society Information

Publication Year: 2008, Page(s): C3
| PDF (29 KB)
• IEEE Transactions on Magnetics institutional listings

Publication Year: 2008, Page(s): C4
| PDF (503 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