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# IEEE Transactions on Magnetics

## Issue 3  Part 2 • March 2010

This issue contains several parts.Go to:  Part 1

## Filter Results

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

Publication Year: 2010, Page(s): C1
| PDF (155 KB)
• ### IEEE Transactions on Magnetics publication information

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

Publication Year: 2010, Page(s):845 - 846
| PDF (62 KB)
• ### Nanocrystalline Spinel Mn$_{x}$Cu$_{1 - x}$Fe$_{2}$O $_{4}$ Ferrites—Synthesis and Structural Elucidation Using X-Ray Diffraction and Positron Annihilation Techniques

Publication Year: 2010, Page(s):847 - 851
Cited by:  Papers (7)
| | PDF (165 KB) | HTML

We have synthesized a series of nanocrystalline ferrite samples with the composition MnxCu1-xFe2O4 (x=0.2, 0.4, 0.6, 0.8) by an advanced sol-gel auto-combustion method. The X-ray diffraction patterns confirm the existence of single-phase cubic spinel crystal structure of ferrites with lattice parameter ranges from 8.395 ¿ to 8.45 ¿. We report t... View full abstract»

• ### Effect of Sample Concentration on the Determination of the Anisotropy Constant of Magnetic Nanoparticles

Publication Year: 2010, Page(s):852 - 859
Cited by:  Papers (19)
| | PDF (561 KB) | HTML

Techniques such as equilibrium (DC) and dynamic (AC) magnetic measurements have been used to determine the anisotropy constant of a variety of magnetic nanoparticles, obtaining values that are often an order of magnitude higher than the corresponding bulk material. Unfortunately, the effect of particle-particle interactions is often neglected, hence the reported values are an effective collective ... View full abstract»

• ### Spin Transfer Torque Memory With Thermal Assist Mechanism: A Case Study

Publication Year: 2010, Page(s):860 - 865
Cited by:  Papers (7)
| | PDF (187 KB) | HTML

We have investigated spin transfer torque random access memory (STT-RAM) with a thermal-assist programming scheme using finite-element thermal simulation. We conducted the study on a specific memory element design to analyze the thermal dynamics and thermal programming mechanism. We paid particular attention to the scalability and design potential of the thermal-assist programming scheme by varyin... View full abstract»

• ### Measuring Entropy Generated by Spin-Transfer

Publication Year: 2010, Page(s):866 - 874
Cited by:  Papers (8)
| | PDF (755 KB) | HTML

We present an experimental protocol that allows the entropy generated by spin-transfer to be measured. We investigate the effect of strong spin injection on a ferromagnetic nanostructure, focusing on the quasi-static equilibrium states of a single magnetic domain. We measure the response of the magnetoresistance to a temperature excitation as a function of the magnetic field for different values o... View full abstract»

• ### Using the Newton–Raphson Method in the Polarization Technique to Solve Nonlinear Static Magnetic Field Problems

Publication Year: 2010, Page(s):875 - 879
Cited by:  Papers (7)
| | PDF (309 KB) | HTML

The paper presents and compares three potential formulations to solve nonlinear static magnetic field problems by applying the fixed point technique and the Newton-Raphson scheme. Nonlinear characteristics are handled by the polarization method in both algorithms. The proposed combination of the Newton-Raphson scheme and the polarization formulation results in a very effective nonlinear solver, be... View full abstract»

• ### Bulletpack: A Fast, Flexible Packing Algorithm for Particulate Media

Publication Year: 2010, Page(s):880 - 885
Cited by:  Papers (8)
| | PDF (1293 KB) | HTML

We introduce a new particle packing code that mimics the process used to fabricate particulate media. It achieves realistic packing fractions, with values well above 40%, and high computational efficiency for nearly arbitrary particle shapes and distributions of geometric and magnetic properties. We perform recording simulations in combination with a modified version of the Magpar micromagnetic co... View full abstract»

• ### A New Shorted Microstrip Method to Determine the Complex Permeability of Thin Films

Publication Year: 2010, Page(s):886 - 888
Cited by:  Papers (5)
| | PDF (193 KB) | HTML

A new method is proposed to determine the complex permeability of ferromagnetic thin films from 100 MHz to 15 GHz. In this method, shorted microstrip transmission-line perturbation combined with the conformal mapping method is used. In contrast with previous methods to measure the thin films deposited on rigid substrates, this method neither requires any reference sample for calibration, nor requi... View full abstract»

• ### Nonferromagnetic Open Shields at Industrial Frequency Rate

Publication Year: 2010, Page(s):889 - 898
Cited by:  Papers (3)
| | PDF (1395 KB) | HTML

We have investigated some innovative geometric configurations for shielding extremely low-frequency (ELF) magnetic fields through nonferromagnetic materials. We define proper 2-D and 3-D finite-element (FE) models for the numerical computation of the shielding effectiveness of open conducting shields, in order to assess the mitigation of the magnetic field generated by a single-wire transmission l... View full abstract»

• ### Determination of Hardness and Residual-Stress Variations in Hardened Surface Layers With Magnetic Barkhausen Noise

Publication Year: 2010, Page(s):899 - 904
Cited by:  Papers (6)
| | PDF (557 KB) | HTML

We use magnetic Barkhausen noise to assess the microstructure, hardness, and residual stresses in hardened surface layers. We performed measurements on induction surface-hardened specimens, the thickness of hardened layers being different in each case. A change in the microstructure of the hardened surface layer produces changes in specific electric conductivity ¿¿ and relative permeability ¿¿ View full abstract»

• ### Finite-Element Model for Simulation of Ferrite-Core Eddy-Current Probe

Publication Year: 2010, Page(s):905 - 909
Cited by:  Papers (17)
| | PDF (341 KB) | HTML

The finite-element method is widely used in modeling eddy-current phenomena. However, its application in eddy-current nondestructive testing involving probe motion requires remeshing for each coil position. Remeshing is not only cumbersome but also a major source of computational noise. We have used the reduced magnetic vector potential formulation to model an air-core probe scan without remeshing... View full abstract»

• ### Pulsed Eddy-Current Based Giant Magnetoresistive System for the Inspection of Aircraft Structures

Publication Year: 2010, Page(s):910 - 917
Cited by:  Papers (52)
| | PDF (1099 KB) | HTML

Research in nondestructive evaluation is constantly increasing the sensitivity of detection of small cracks embedded deep in layered aircraft structures. Pulsed eddy-current (PEC) techniques using coil probes have shown considerable promise in detection and characterization of buried cracks in multilayered structures. In this paper, we describe the design and development of a nondestructive inspec... View full abstract»

• ### Improving Loss Properties of the Mayergoyz Vector Hysteresis Model

Publication Year: 2010, Page(s):918 - 924
Cited by:  Papers (36)
| | PDF (368 KB) | HTML

We present a new method for improving the magnetic loss properties of a certain class of isotropic vector hysteresis models based on the Mayergoyz model. We show that the Mayergoyz model possesses the necessary features for representing vector hysteresis but falls short of satisfying the loss property under rotating magnetic fields with magnitudes close to saturation. Therefore, we propose a new s... View full abstract»

• ### Observing the Magnetization Distribution in the Pseudo Soft Underlayer of Perpendicular Magnetic Recording Media by Electron Holography

Publication Year: 2010, Page(s):925 - 927
Cited by:  Papers (2)
| | PDF (661 KB) | HTML

We visualized the magnetic flux density of the cross track direction in the pseudo soft underlayer (SUL) of perpendicular magnetic recording media. We deposited a pseudo-SUL on the fabricated slider of a perpendicular magnetic recording head, and used electron holography to visualize and quantify the magnetic flux magnitude and distribution in the pseudo-SUL. We observed the pseudo-SUL magnetized ... View full abstract»

• ### Flying-Height Measurement With a Symmetrical Common-Path Heterodyne Interferometry Method

Publication Year: 2010, Page(s):928 - 932
Cited by:  Papers (3)
| | PDF (282 KB) | HTML

To enhance the magnetic storage capacity of hard disk drives, the areal density of recording has to be increased continuously. But as the areal density of recording increases to over 100 Gb/in2, the head-disk physical gap, also called flying height (FH), decreases to less than 10 nm. Measurement of FH becomes a significant challenge. In this paper, we propose a symmetrical common-path h... View full abstract»

• ### Improving Burst Error Tolerance of LDPC-Centric Coding Systems in Read Channel

Publication Year: 2010, Page(s):933 - 941
Cited by:  Papers (6)  |  Patents (1)
| | PDF (1093 KB) | HTML

We report on the use of low-density parity check (LDPC)-centric error correction coding (ECC) for magnetic recording read channel in the presence of significant burst errors. Since an LDPC code by itself is severely vulnerable to burst errors due to its soft-decision probability-based decoding, we focus on LDPC-centric concatenated coding in which LDPC code is used as inner code. To improve the bu... View full abstract»

• ### Analysis of Eddy-Current Loss in End Shield and Frame of a Large Induction Machine

Publication Year: 2010, Page(s):942 - 948
Cited by:  Papers (12)
| | PDF (879 KB) | HTML

This paper proposes an effective method of analyzing the eddy-current loss within the end shield and frame of an electric machine. The standard impedance boundary condition is applied to the conducting surfaces of complete 3-D models, and the models are solved by time-harmonic finite-element analyses. Measurement of the temperature rise is completed as a validation of the proposed method. The effe... View full abstract»

• ### Interdependence of Demagnetization, Loading, and Temperature Rise in a Permanent-Magnet Synchronous Motor

Publication Year: 2010, Page(s):949 - 953
Cited by:  Papers (67)
| | PDF (358 KB) | HTML

The demagnetization of permanent magnets in permanent-magnet machines has been under discussion in many publications lately. Demagnetization models have been used, for example, to optimize the machine structures but there have been no studies on how the demagnetization is coupled with the loading and temperature-rise of the machine and how this coupling should be modeled. In this paper, we model t... View full abstract»

• ### A Vector Control Method of LPMBDCM Considering Effects of PM Flux Linkage Harmonic and Cogging Force

Publication Year: 2010, Page(s):954 - 959
Cited by:  Papers (5)
| | PDF (570 KB) | HTML

This paper presents a general vector control principle of surface-mounted permanent magnet (SPM) motors with arbitrary back-electromotive-force (back-EMF) waveform, then applies it to minimize the force pulsation of three-phase linear permanent magnet brushless dc motors (LPMBDCMs). The principle is derived from the force equation in the dot product form of the current vector and the permanent mag... View full abstract»

Publication Year: 2010, Page(s): 960
| PDF (205 KB)
• ### IEEE Magnetics Society Information

Publication Year: 2010, Page(s): C3
| PDF (30 KB)
• ### IEEE Transactions on Magnetics institutional listings

Publication Year: 2010, Page(s): C4
| PDF (152 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.

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## Meet Our Editors

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