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# IEEE Transactions on Magnetics

## Issue 1  Part 2 • Jan. 2011

This issue contains several parts.Go to:  Part 1

## Filter Results

Displaying Results 1 - 22 of 22
• ### [Front cover]

Publication Year: 2011, Page(s): C1
| PDF (149 KB)
• ### IEEE Transactions on Magnetics publication information

Publication Year: 2011, Page(s): C2
| PDF (39 KB)

Publication Year: 2011, Page(s):149 - 150
| PDF (61 KB)
• ### Ga Implantation in a MgO-based Magnetic Tunnel Junction With $hbox{Co}_{60}hbox{Fe}_{20}hbox{B}_{20}$ Layers

Publication Year: 2011, Page(s):151 - 155
Cited by:  Papers (6)
| | PDF (436 KB) | HTML

A Co60Fe20B20-based tunneling magnetoresistance multilayer stack with an MgO barrier has been exposed to 30 keV Ga ions at doses corresponding to ion etching and metal deposition in a focused ion beam (FIB) instrument, to study the applicability of these processes to magnetic tunnel junction (MTJ) fabrication. MTJs were fabricated and irradiated to investigate how ... View full abstract»

• ### Current Switching in MgO-Based Magnetic Tunneling Junctions

Publication Year: 2011, Page(s):156 - 160
Cited by:  Papers (13)
| | PDF (353 KB) | HTML

Spin-transfer induced magnetization switching in a MgO-based magnetic tunneling junction (MTJ) has been measured over a wide time range. It was found that the switching current response is asymmetric going from the high resistance state to the low resistance state and vice versa. This asymmetry must be taken into consideration to optimize the read-write margin for a 1T1R (single transistor, single... View full abstract»

• ### Influence of Seed Layer Systems and Their Premagnetization by Low Temperature Annealing on Electrodeposited Ni-Fe Fluxgate Cores

Publication Year: 2011, Page(s):161 - 169
Cited by:  Papers (1)
| | PDF (1356 KB) | HTML

Electrodeposited ferromagnetic nickel-iron is used as functional layers in several microsystems, e.g., in micro fluxgate magnetometers. The magnetic properties of the flux guiding magnetometer core structures characterize the sensor response. In this work, the influences of substrate, undercoating, and seed layer on the physical and magnetic properties of electrodeposited fluxgate cores are discus... View full abstract»

• ### Estimation of Time-Dependent Polarization Losses in Sintered Nd-Fe-B Permanent Magnets

Publication Year: 2011, Page(s):170 - 174
Cited by:  Papers (3)
| | PDF (443 KB) | HTML

The thermal stability of sintered NdFeB magnets can be described by the temperature coefficient of remanent flux density α only on condition that demagnetization due to rising temperature or field and oxidation of the magnets are totally avoided. This also requires the control of time-dependent demagnetization at elevated temperatures. We have studied the time-dependent polarization losses ... View full abstract»

• ### Positive-Feedback Theory of Hysteretic Recoil Loops in Hard Ferromagnetic Materials

Publication Year: 2011, Page(s):175 - 191
Cited by:  Papers (7)
| | PDF (1387 KB) | HTML

This paper develops a physically-based analytical theory that can be used to model recoil loops, as well as major loops and first- and second-order return curves, in hard ferromagnetic materials that display return-point memory. Atomic-scale quantum-mechanical considerations lead to basic S-shaped magnetization curves that account for hysteretic effects in major and minor loops, as well as their r... View full abstract»

• ### Reversible and Irreversible Components Evaluation in Hysteretic Processes Using First and Second-Order Magnetization Curves

Publication Year: 2011, Page(s):192 - 197
Cited by:  Papers (8)
| | PDF (716 KB) | HTML

This paper presents a method to separate the reversible and irreversible parts of magnetization in real ferromagnetic systems. The basic hypothesis is that the first-order reversal curve (FORC) diagram includes effects of both the reversible and irreversible components while the remanent second-order reversal curve (SORCR) diagram includes essentially only the irreversible component. Th... View full abstract»

• ### Three-Dimensional Magnetostatic Analysis Using Structured Mesh and Nodal Elements

Publication Year: 2011, Page(s):198 - 206
Cited by:  Papers (2)
| | PDF (716 KB) | HTML

A structured mesh consisting of uniform, undistorted or regular shaped elements is easy to generate because it does not conform to the geometry. In order to use such a mesh for analysis, the geometry has to be represented independently of the mesh. To apply essential boundary conditions when nodes are not present on the boundary, the implicit boundary method was developed which uses solution struc... View full abstract»

• ### Systematic Coupling of Multiple Magnetic Field Systems and Circuits Using Finite Element and Modified Nodal Analyses

Publication Year: 2011, Page(s):207 - 213
Cited by:  Papers (8)
| | PDF (855 KB) | HTML

Existing circuit-field coupling schemes can deal with a single magnetic field model connected to an external circuit. However, modern electrical systems are a complex interconnection of multiple magnetic devices, which opens up the question of how to consider multiple interacting field models. In this paper, we propose a scheme based on the finite element and modified nodal analyses, to solve the ... View full abstract»

• ### Size Effect on Magnetic Switching and Interlayer Magnetostatic Coupling in Spin-Valve Nanorings Exchange-Biased by Synthetic Antiferromagnets

Publication Year: 2011, Page(s):214 - 220
Cited by:  Papers (2)
| | PDF (1587 KB) | HTML

This paper presents studies of the size effect on magnetic switching and interlayer magnetostatic coupling in synthetic antiferromagnet (SAF)-pinned spin-valve nanorings connected to nano stripes with a nanoconstriction. Micromagnetic simulation has been successfully used to reveal the detailed magnetization reversal process of these nanorings. It was observed that SAF-pinned spin-valve nanorings ... View full abstract»

• ### Dynamic Model for 3-D Magnetostrictive Transducers

Publication Year: 2011, Page(s):221 - 230
Cited by:  Papers (20)
| | PDF (802 KB) | HTML

A comprehensive analytical framework is developed for the study of magnetostrictive transducers with arbitrary geometries operated in dynamic regimes. Weak form equations are derived from Maxwell's equations and linear momentum without restricting the form of the constitutive behavior of the magnetostrictive material. For validation, the framework is implemented for a unimorph beam actuator which ... View full abstract»

• ### Three-Dimensional Nonaxisymmetric Pole Piece Shape Optimization for Biplanar Permanent-Magnet MRI Systems

Publication Year: 2011, Page(s):231 - 238
Cited by:  Papers (8)  |  Patents (2)
| | PDF (1021 KB) | HTML

The pole pieces of a permanent-magnet system for magnetic resonance imaging (MRI) are optimized for maximum magnetic field homogeneity in the imaging volume. Axisymmetric and nonaxisymmetric optimized pole piece designs based on the same geometrical parameterization are presented. The optimization algorithm demonstrated is based on field calculations by the three-dimensional finite-element method ... View full abstract»

• ### Durability Against Contact Wear of Nonlubricated Disks in the Head–Disk Interface of Disk Drives

Publication Year: 2011, Page(s):239 - 243
Cited by:  Papers (5)
| | PDF (385 KB) | HTML

Ever decreasing magnetic spacing in the hard disk drive requires each contribution to the magnetic spacing to be examined for possible reduction. Currently, the lubricant layer on top of the disk carbon overcoat is typically 10-20 Å thick. This paper studies the contact resistance of nonlubricated disks with the aim of seeking a way to reduce the lubricant thickness contribution to the magn... View full abstract»

• ### Equivalent Permeability of Step-Lap Joints of Transformer Cores: Computational and Experimental Considerations

Publication Year: 2011, Page(s):244 - 251
Cited by:  Papers (14)
| | PDF (500 KB) | HTML

The paper develops an efficient computational method for establishing equivalent characteristics of magnetic joints of transformer cores, with special emphasis on step-lap design. By introducing an equivalent material, the method allows the real three-dimensional structure of the laminated thin sheets to be treated computationally as a two-dimensional problem and enables comparative analysis of de... View full abstract»

• ### A New Simplex Wave Winding Permanent-Magnet Brushless DC Machine

Publication Year: 2011, Page(s):252 - 259
Cited by:  Papers (6)
| | PDF (1182 KB) | HTML

A new simplex wave winding permanent-magnet (PM) brushless DC machine is proposed in this paper. Besides PM excitation and electric commutation, the machine has close-connected winding identical to the brushed DC machine. By properly controlling the power electronic switch status, the current direction of coils under N or S pole is unchanged. Thus, the new machine's operation principle is exactly ... View full abstract»

• ### Electromagnetic Design of a Novel Linear Maglev Transportation Platform With Finite-Element Analysis

Publication Year: 2011, Page(s):260 - 263
Cited by:  Papers (6)
| | PDF (791 KB) | HTML

In this paper, a novel maglev transportation platform is developed for ultra-precision linear motion with large travel range, and an optimized decoupled electromagnet spatial distribution of this platform is designed with finite-element analysis. The platform consists of a levitation subsystem and a propulsion subsystem. The levitation subsystem uses six pairs of electromagnets to steadily suspend... View full abstract»

• ### Heat Transfer Effects in Scanning Anisotropic Magnetoresistive Imaging

Publication Year: 2011, Page(s):264 - 266
Cited by:  Papers (1)
| | PDF (126 KB) | HTML

In our experiments of magnetic microscope and magnetic particle detection using an anisotropic magnetoresistive (AMR) sensor, we found that any nonmagnetic materials can also produce signals when they were close to the AMR senor. By simultaneously monitoring the temperature and the output signal of AMR sensor, we proved that these signals were caused by the thermal disturbance induces by the nonco... View full abstract»

• ### 2011 IEEE membership form

Publication Year: 2011, Page(s):267 - 268
| PDF (1361 KB)
• ### IEEE Magnetics Society Information

Publication Year: 2011, Page(s): C3
| PDF (31 KB)
• ### IEEE Transactions on Magnetics institutional listings

Publication Year: 2011, Page(s): C4
| PDF (178 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