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# IEEE Transactions on Magnetics

## Filter Results

Displaying Results 1 - 24 of 24
• ### [Front cover]

Publication Year: 2012, Page(s): C1
| PDF (212 KB)
• ### IEEE Transactions on Magnetics publication information

Publication Year: 2012, Page(s): C2
| PDF (39 KB)
• ### Table of contents

Publication Year: 2012, Page(s):1073 - 1074
| PDF (140 KB)
• ### Modern Microwave Ferrites

Publication Year: 2012, Page(s):1075 - 1104
Cited by:  Papers (165)
| | PDF (2815 KB) | HTML

Microwave ferrites are ubiquitous in systems that send, receive, and manipulate electromagnetic signals across very high frequency to quasi-optical frequency bands. In this paper, modern microwave ferrites are reviewed including spinel, garnet, and hexaferrite systems as thin and thick films, powders and compacts, and metamaterials. Their fundamental properties and utility are examined in the cont... View full abstract»

• ### A Fast Finite-Difference Method for Micromagnetics Using the Magnetic Scalar Potential

Publication Year: 2012, Page(s):1105 - 1109
Cited by:  Papers (13)
| | PDF (450 KB) | HTML

We propose a method for the stray-field computation of ferromagnetic microstructures via the magnetic scalar potential. The scalar potential is computed using the convolution theorem and the fast Fourier transform. For the discrete convolution an analytical expression for the scalar potential of a uniformly magnetized cuboid is presented. A performance gain of up to 55% compared to common simulati... View full abstract»

• ### Monte Carlo Simulation of the Vacancies and Thickness Effects on the Magnetic Behavior of La $_{0.67}$Ca $_{0.33}$MnO $_{3}$ Thin Films

Publication Year: 2012, Page(s):1110 - 1114
Cited by:  Papers (1)
| | PDF (450 KB) | HTML

Monte Carlo simulations of La0.67Ca0.33MnO3 thin films by using the Metropolis algorithm and a nearest neighbor classical Heisenberg model were carried out. Films were simulated by considering system sizes of L × L × d magnetic ions, being d the film thickness, which was varied, and L the linear dimension of the basal plane, which was kept fixed at a ... View full abstract»

• ### Modeling High-Order Ferromagnetic Hysteretic Minor Loops and Spirals Using a Generalized Positive-Feedback Theory

Publication Year: 2012, Page(s):1115 - 1129
Cited by:  Papers (9)
| | PDF (1771 KB) | HTML

A generalization of the previously-described positive-feedback theory of first- and second-order reversal curves permits modeling of minor loops of arbitrarily high order n. The validity of the theory is tested by using it to model various types of high-order phenomena (n ≥3), including symmetrical and asymmetrical spirals as well as closed minor loops, in a variety of different hard and so... View full abstract»

• ### Perpendicular Magnetic Tunnel Junctions Having CoFeB/CoPt Alloy Layers

Publication Year: 2012, Page(s):1130 - 1133
| | PDF (429 KB) | HTML

We have fabricated perpendicular magnetic tunnel junctions consisting of hcp Ru underlayer/hcp CoPt alloy/CoFeB/MgO/CoFeB/CoPt alloy (or Co)/Pt capping layer. By inserting the CoPt alloy (or Co) between the CoFeB and Pt capping layers, it is possible to increase a perpendicular magnetic anisotropy of the top electrode. Using a top electrode of , we have obtained an effective magnetic anisotropy of... View full abstract»

• ### Gain and Fan-Out in a Current-Field Driven Spin Transistor With an Assisting AC Magnetic Field

Publication Year: 2012, Page(s):1134 - 1138
Cited by:  Papers (2)
| | PDF (401 KB) | HTML

We investigated gain and fan-out in a current-field driven spin transistor that is driven by a current-induced magnetic field. The basic structure of the transistor consisted of a coplanar waveguide for magnetic field application and an MgO-based magnetic tunnel junction with high magnetoresistance and low resistance area product. Under an assisting ac magnetic field and a dc bias voltage of 0.4 V... View full abstract»

• ### Ordering Transformation of FePt Thin Films by Initial Stress/Strain Control

Publication Year: 2012, Page(s):1139 - 1142
| | PDF (550 KB) | HTML

The influence of initial stress/strain state on ordering of FePt is studied. The internal stress of FePt thin films deposited at room temperature can be successfully controlled in a wide range from compressive 0.95 GPa to 1.1 GPa tensile by adjusting sputter distance and inserting underlayer with different thickness. Ordering process is triggered by rapid thermal annealing at 350 for 15 min. Struc... View full abstract»

• ### Impact of Various Factors on Relationships Between Stress and Eigen Magnetic Field in a Steel Specimen

Publication Year: 2012, Page(s):1143 - 1154
Cited by:  Papers (7)
| | PDF (1439 KB) | HTML

Many materials which could cause a real threat of a catastrophe due to fatigue, exceeding stress limits or plastic strain have magnetic properties that could affect the local magnetic field. Though active magnetic methods of condition monitoring are quite well-known and widely applied however, passive techniques which are based only on the existence of natural magnetic field of the Earth, still re... View full abstract»

• ### Wide Range Magnetoresistance in Rare Earth Manganite Through Substitution of Magnetic Impurity

Publication Year: 2012, Page(s):1155 - 1158
Cited by:  Papers (2)
| | PDF (231 KB) | HTML

We report synthesis of rare earth manganite samples with co-substitution of divalent Ca at La site and magnetic Fe at Mn site. The lattice structure remained unaffected with 5% and 10% substitution of Fe. However, the charge transport had profound effect of this substitution. The metal-insulator transition temperature lowered from 270 K to 200 K for 5% substitution. It also resulted in widening of... View full abstract»

• ### Evaluation of Eddy-Current Probe Signals Due to Cracks in Fastener Holes

Publication Year: 2012, Page(s):1159 - 1170
Cited by:  Papers (15)
| | PDF (463 KB) | HTML

Cracks in conductors are detected through changes in the impedance of a coil that induces current in the material. In order to gain insight into the physics of the inspection, we have developed a theoretical and computational model that predicts the signals due to cracks in circular cylindrical holes using a boundary element calculation. In formulating the problem, the electromagnetic field is dec... View full abstract»

• ### New Designs for Deep Brain Transcranial Magnetic Stimulation

Publication Year: 2012, Page(s):1171 - 1178
Cited by:  Papers (15)
| | PDF (555 KB) | HTML

New applications for transcranial magnetic stimulation are developing rapidly for both diagnostic and therapeutic purposes. Therefore, so is the demand for improved performance, particularly in terms of the ability to stimulate deeper regions of the brain and to do so selectively. The coil designs that are used presently are limited in their ability to stimulate the brain at depth and with high sp... View full abstract»

• ### Optimization MRI Cylindrical Coils Using Discretized Stream Function With High Order Smoothness

Publication Year: 2012, Page(s):1179 - 1188
Cited by:  Papers (2)
| | PDF (1339 KB) | HTML

The design of coil for magnetic resonance image (MRI) application is an optimization problem, in which a specified distribution of the magnetic field inside a region of interest is generated by choosing the optimal distribution of current density on a specified non-intersecting design surface. This paper proposes an iterative optimization method for designing MRI coils on a cylindrical surface by ... View full abstract»

• ### Exploring the Effect of Stick-Slip Friction Transition Across Tape-Roller Interface on the Transmission of Lateral Vibration

Publication Year: 2012, Page(s):1189 - 1199
Cited by:  Papers (2)
| | PDF (1200 KB) | HTML

In magnetic tape drives, lateral in-plane vibration of the tape leads to misalignment between data tracks and read/write head's position resulting in reduced storage capacity. To attenuate this lateral tape motion (LTM), surface guides-which include grooved, porous or roughened rollers-are used. The axial motion of the tape over the roller surface switches between two states: a sticking state when... View full abstract»

• ### Theoretical Study of Induction Pump for Molten Metal Using Rotating Twisted Magnetic Field

Publication Year: 2012, Page(s):1200 - 1211
Cited by:  Papers (2)
| | PDF (1414 KB) | HTML

In this paper, the electromagnetic field in an induction pump for molten metal using rotating twisted magnetic field is theoretically analyzed. Asymptotic analysis for small magnetic Reynolds number clarifies that temporal mean value of the axial driving force f̅z is almost uniform but rather small when the twist ratio ka2 is considerably smaller than 1. On the other h... View full abstract»

• ### Analytical Modeling of the Open-Circuit Magnetic Field in Axial Flux Permanent-Magnet Machines With Semi-Closed Slots

Publication Year: 2012, Page(s):1212 - 1226
Cited by:  Papers (32)
| | PDF (1005 KB) | HTML

This paper presents a multi-slice analytical model for prediction of the open-circuit magnetic field in slotted semi-closed permanent-magnet axial flux synchronous machines. The technique is based on 2-D exact solution of the Maxwell's equations using the separation of variables method. The magnetic field expressions are developed in slots regions, slot opening regions, magnetic air gap regions, a... View full abstract»

• ### A New Topology of Low Speed Doubly Salient Brushless DC Generator for Wind Power Generation

Publication Year: 2012, Page(s):1227 - 1233
Cited by:  Papers (24)
| | PDF (1484 KB) | HTML

The unit machine of the traditional doubly salient electro-magnetic generator (DSEG) has a 6/4-pole structure, so it must have a large number of stator poles when used as a low speed wind turbine generator. The matching relationship between the stator pole number and the rotor pole number of a multi-poles-rotor DSEG is deduced, and a new 3N/4N-pole DSEG is proposed. The magnetostatic field distrib... View full abstract»

• ### Analytical Modeling and Analysis of Open-Circuit Magnet Loss in Surface-Mounted Permanent-Magnet Machines

Publication Year: 2012, Page(s):1234 - 1247
Cited by:  Papers (22)
| | PDF (1235 KB) | HTML

The paper presents an analytical model for predicting the open-circuit magnet eddy-current loss due to slotting in surface-mounted permanent-magnet machines based on the exact subdomain field model. The spatial and temporal characteristics of field harmonics due to slotting and corresponding eddy-current harmonics in the magnet are analyzed in both stator and rotor reference frames. The contributi... View full abstract»

• ### Effective Switching Field Distribution Evaluation Using Saturation Field in Minor Loop*

Publication Year: 2012, Page(s):1248 - 1251
Cited by:  Papers (2)
| | PDF (458 KB) | HTML

A new method for evaluating the switching field distribution (SFD) in perpendicular magnetic recording media is proposed using the saturation magnetic field of a minor loop, Hsminor. In this method, the switching fields of focused reversal magnetic grains are measured with all magnetic moments in other domains saturated in the upward direction. Thus, the proposed SFD evaluati... View full abstract»

• ### Correction to “Finite Size Effect on Spread of Resonance Frequencies in Arrays of Coupled Vortices” [Jun 11 1610-1613]

Publication Year: 2012, Page(s): 1252
| | PDF (32 KB) | HTML

A typing error occurred in the second term on the right-hand side of (1) in the above titled paper (ibid., vol. 47, no. 6, pp. 1610-1613, June 2011). The corrected equation is presented here. View full abstract»

• ### IEEE Magnetics Society Information

Publication Year: 2012, Page(s): C3
| PDF (31 KB)
• ### IEEE Transactions on Magnetics institutional listings

Publication Year: 2012, Page(s): C4
| PDF (136 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