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# IEEE Transactions on Magnetics

## Filter Results

Displaying Results 1 - 25 of 28
• ### [Front cover]

Publication Year: 2010, Page(s): C1
| PDF (333 KB)
• ### IEEE Transactions on Magnetics publication information

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

Publication Year: 2010, Page(s):3965 - 3966
| PDF (62 KB)
• ### Magnetic Composite Materials and Arbitrary $B$-$H$ Relationships

Publication Year: 2010, Page(s):3967 - 3972
Cited by:  Papers (4)
| | PDF (1007 KB) | HTML

This theoretical study addresses fabricating composite conducting materials with an effective arbitrary B-H relationship in the quasi-static field approximation, exhibiting new magnetic properties. The experimental results demonstrate the possibility of having linear artificial structures with negative effective magnetic permeability. The equivalent circuital model confirms the theoretical and exp... View full abstract»

• ### Composition Dependence of Structural and Magnetic Properties of Electrodeposited Co-Cu Films

Publication Year: 2010, Page(s):3973 - 3977
Cited by:  Papers (6)
| | PDF (1591 KB) | HTML

The structural and magnetic properties of Co-Cu films were studied in terms of Co content in the films. The surface morphology of the films showed that the film with the lowest Co content (3 wt. %) had dendritic structures, whereas the surface of the film containing the highest amount of Co (61 wt. %) was more uniform with acicular shapes in some parts. X-ray diffraction patterns of the films show... View full abstract»

• ### A Simple Way to Synthesize Superparamagnetic Iron Oxide Nanoparticles in Air Atmosphere: Iron Ion Concentration Effect

Publication Year: 2010, Page(s):3978 - 3983
Cited by:  Papers (36)
| | PDF (1657 KB) | HTML

We have synthesized iron oxide nanoparticles in air atmosphere by coprecipitation. The ratio of was fixed at 2/3. The total amount of iron ions in the solution was varied from 250 mmol to 12.5 mmol. X-ray diffraction (XRD) patterns showed the characteristic peaks of iron oxide phases. We observed that the crystallinity reduced and particle sizes calculated from XRD patterns decreased as the iron i... View full abstract»

• ### Use of Jiles–Atherton and Preisach Hysteresis Models for Inverse Feed-Forward Control

Publication Year: 2010, Page(s):3984 - 3989
Cited by:  Papers (33)
| | PDF (629 KB) | HTML

Hysteresis effects hinder the accurate control of electromagnetic actuators and require auxiliary sensors for properly determining the hysteretic system state. The physics-based Jiles-Atherton and the phenomenological Preisach hysteresis models provide powerful means to describe the magnetic hysteresis and its inverse. In this paper, we consider both hysteresis models in the scalar form from the c... View full abstract»

• ### A General Vector Hysteresis Operator: Extension to the 3-D Case

Publication Year: 2010, Page(s):3990 - 4000
Cited by:  Papers (77)
| | PDF (1088 KB) | HTML

This paper deals with the mathematical definition of a general vector hysteresis operator in 3-D, as an extension of previous papers where the theory has been limited to the 2-D case. Although the paper is mainly focused on magnetic hysteresis, the definitions and the results reported can be applied to any general physical phenomenon that exhibits hysteresis. We show here the main general properti... View full abstract»

• ### Effect of Anisotropy and Direction of Magnetization on Complex Permeability of Ferromagnetic Rectangular Thin Slabs

Publication Year: 2010, Page(s):4001 - 4008
Cited by:  Papers (2)
| | PDF (593 KB) | HTML

Ultrasoft magnetic materials, such as amorphous, nanocrystalline, and polycrystalline alloys, have been successfully used for power electronic applications during recent years. However, enhancements are needed for the integration of power electronic features, which involves high power densities and operating frequencies up to a few megahertz. Complex permeability spectra, which are used to describ... View full abstract»

• ### Ampere's Circuital 3-D Model for Noncuboidal Magnets

Publication Year: 2010, Page(s):4009 - 4015
Cited by:  Papers (1)
| | PDF (749 KB) | HTML

Analytical equations describing the three-dimensional field of permanent magnets are attractive tools for the optimization of permanent-magnet based structures. The shape of the magnets determines to a high extent the type of solution. The objective of this research is to find the equations describing the field of a pyramidal frustum, based on the Biot-Savart law. We develop analytical equations d... View full abstract»

• ### Convexity-Oriented Method for the Topology Optimization of Ferromagnetic Moving Parts in Electromagnetic Actuators Using Magnetic Energy

Publication Year: 2010, Page(s):4016 - 4022
Cited by:  Papers (3)
| | PDF (567 KB) | HTML

When applied to the topology optimization of electromagnetic devices, gradient-based algorithms suffer from a lack of convexity. They usually converge to local minimizers and the obtained designs depend on the initial material distributions. This paper focuses on avoiding these local minimizers for the optimization of ferromagnetic moving parts in electromagnetic actuators. The proposed method int... View full abstract»

• ### A New Tracking System for Three Magnetic Objectives

Publication Year: 2010, Page(s):4023 - 4029
Cited by:  Papers (25)
| | PDF (658 KB) | HTML

We have implemented a new noninvasive multiobjective tracking system, which can be used for localization of an endoscope and monitoring of heart valve prostheses and gastrointestinal transit of solid oral dosage forms or nutrients. The marker is modeled as a magnetic dipole, and the magnetic field at some point is regarded as summation of those from three dipoles. By minimizing the squared errors ... View full abstract»

• ### Novel High-Speed Electromagnetic Actuator With Permanent-Magnet Shielding for High-Pressure Applications

Publication Year: 2010, Page(s):4030 - 4033
Cited by:  Papers (8)
| | PDF (277 KB) | HTML

We present a novel moving-iron, high-pressure, high-speed electromagnetic actuator that utilizes permanent-magnet (PM) shielding for increasing air-gap flux. We analyze its static and dynamic characteristics by using the finite-element method, taking into account the nonlinear characteristics and the eddy-current loss of the magnetic material. The experimental and simulated results agree well and ... View full abstract»

• ### A Novel 3-DOF Axial Hybrid Magnetic Bearing

Publication Year: 2010, Page(s):4034 - 4045
Cited by:  Papers (60)
| | PDF (1654 KB) | HTML

In this paper, we propose a novel structure of permanent-magnet-biased axial hybrid magnetic bearing. It has four segments of poles to control three degrees of freedom (3-DOF). Based on the inner and outer air gaps in conventional axial magnetic bearings, a novel air gap, called the subsidiary air gap, is constructed between the permanent magnet and the stator poles. This air gap separates the bia... View full abstract»

• ### Effect of Model Accuracy on the Result of Computed Current Densities in the Simulation of Transcranial Magnetic Stimulation

Publication Year: 2010, Page(s):4046 - 4051
Cited by:  Papers (11)
| | PDF (912 KB) | HTML

In this paper, we study the effects of model complexity on the accuracy of the results in the computer simulation of transcranial magnetic stimulation (TMS). The method has been extensively used in the last decade as a noninvasive technique to excite neurons in the brain by inducing weak electric currents in the tissue and proved to be a very promising alternative for currently invasive treatments... View full abstract»

• ### Design and Optimization of a Novel Bored Biplanar Permanent-Magnet Assembly for Hybrid Magnetic Resonance Imaging Systems

Publication Year: 2010, Page(s):4052 - 4058
Cited by:  Papers (11)
| | PDF (648 KB) | HTML

We present a novel design for a biplanar permanent-magnet assembly suitable for use in hybrid magnetic resonance imaging (MRI) systems. The key feature of our design is a large cylindrical hole that is longitudinally bored through the entire magnet assembly. The presence of the bore permits the potential inclusion of additional peripheral devices within or near the magnet structure that may benefi... View full abstract»

• ### Recording at Large Write Currents on Obliquely Evaporated Medium and Application to a Multilevel Recording Scheme

Publication Year: 2010, Page(s):4059 - 4065
Cited by:  Papers (4)  |  Patents (1)
| | PDF (915 KB) | HTML

We have studied the recording process of an obliquely evaporated Co-CoO medium. The experimental readback waveforms and the spin-SEM images of the recorded magnetization reveal an interesting magnetization process upon increasing the write current in one of the two recording directions. With larger write currents, isolated readback pulses drastically change their shape and the remanent magnetizati... View full abstract»

• ### Line-Start Permanent-Magnet Motors: Significant Improvements in Starting Torque, Synchronization, and Steady-State Performance

Publication Year: 2010, Page(s):4066 - 4072
Cited by:  Papers (32)
| | PDF (1466 KB) | HTML

We present a new scheme to improve the starting torque and synchronization capability of line-start permanent-magnet motors based on pole changing winding. Pole changing at start-up neutralizes the magnetic influence of permanent magnets and, therefore, leads to the elimination of braking and pulsating torques, and enhances the starting torque. Our scheme also solves the synchronization problem. W... View full abstract»

• ### Iron and Magnet Losses and Torque Calculation of Interior Permanent Magnet Synchronous Machines Using Magnetic Equivalent Circuit

Publication Year: 2010, Page(s):4073 - 4080
Cited by:  Papers (46)
| | PDF (812 KB) | HTML

We present a faster and simpler approach for the calculation of iron and magnet losses and torque of an interior permanent-magnet synchronous machine (IPMSM) than finite-element methods (FEM). It uses a magnetic equivalent circuit (MEC) based on large elements and takes into account magnetic saturation and magnet eddy currents. The machine is represented by nonlinear and constant reluctance elemen... View full abstract»

• ### A Comprehensive Analytical Mathematic Model for Permanent-Magnet Synchronous Machines Incorporating Structural and Saturation Saliencies

Publication Year: 2010, Page(s):4081 - 4091
Cited by:  Papers (13)
| | PDF (1283 KB) | HTML

We introduce a new method to model permanent-magnet synchronous machines (PMSMs) with saliencies due to the salient structure and magnetic saturation. We define two parameters to indicate these saliencies, i.e., the structural saliency ratio and the saturation saliency ratio . To verify the nonlinear model, we tested a real PMSM and numerically simulated it. The nonlinear inductance matrix is dedu... View full abstract»

• ### Optimum Design of Tubular Permanent-Magnet Motors for Thrust Characteristics Improvement by Combined Taguchi–Neural Network Approach

Publication Year: 2010, Page(s):4092 - 4100
Cited by:  Papers (14)
| | PDF (1222 KB) | HTML

Although tubular permanent-magnet motors have advantages such as remarkable force capability and high efficiency due to lack of end winding, they suffer from high thrust force ripple. This paper presents the use of Taguchi method and artificial neural network (ANN) for shape optimization of axially magnetized tubular linear permanent-magnet (TLPM) motors. A multiobjective design optimization is pr... View full abstract»

• ### Optimized Design Considering the Mass Influence of an Axial Flux Permanent-Magnet Synchronous Generator With Concentrated Pole Windings

Publication Year: 2010, Page(s):4101 - 4107
Cited by:  Papers (46)
| | PDF (791 KB) | HTML

In this paper, the efficiency optimization of an axial flux permanent-magnet synchronous generator with concentrated pole windings is examined for a 3.6 kW/2000 rpm combined heat and power application. Because the efficiency of the machine is important, specific measures are taken in order to reduce losses in the machine: thin laminated grain oriented material in the teeth, concentrated pole windi... View full abstract»

• ### Reduced-State Bahl–Cocke–Jalinek–Raviv Detector for Patterned Media Storage

Publication Year: 2010, Page(s):4108 - 4110
Cited by:  Papers (4)
| | PDF (355 KB) | HTML

Bit-patterned media (BPM) is a promising candidate for future high-capacity magnetic storage. The inter-track interference (ITI) in BPM has been taken into account by the “multiple islands per read head” model. However, the complexity of the symbol-based detection for this model is too high for practical use. To reduce complexity, we propose to use the reduced-state Bahl-Cocke-Jeline... View full abstract»

Publication Year: 2010, Page(s): 4111
| PDF (269 KB)
• ### IEEE Magnetics Letters

Publication Year: 2010, Page(s): 4112
| PDF (511 KB)

## 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