# IEEE Transactions on Magnetics

## Volume 50 Issue 7  Part 2 • July 2014

This issue contains several parts.Go to:  Part 1

## Filter Results

Displaying Results 1 - 25 of 31
• ### [Front cover]

Publication Year: 2014, Article Sequence Number: 0004501
| PDF (337 KB)
• ### IEEE Transactions on Magnetics publication information

Publication Year: 2014, Article Sequence Number: 0004601
| PDF (197 KB)
• ### IEEE Magnetics Society Information

Publication Year: 2014, Article Sequence Number: 0004701
| PDF (104 KB)
• ### IEEE Transactions on Magnetics institutional listings

Publication Year: 2014, Article Sequence Number: 0004801
| PDF (192 KB)

Publication Year: 2014, Article Sequence Number: 0101202
| PDF (220 KB)
• ### Preparation of Composite Nanoparticles of Fe-Zn Bioxide Using Surface Modification and Their Subsequent Characterization

Publication Year: 2014, Article Sequence Number: 2200106
Cited by:  Papers (1)
| | PDF (983 KB) | HTML

During the liquid-phase synthesis of γ-Fe2O3 nanoparticles using a chemically induced transition in FeCl2 solution (400 mL, 0.25 M), the surface modification of the particles was undertaken by adding ZnCl2 solution, in an attempt to prepare composite nanoparticles. The magnetization, morphology, chemical composition, and crystal structure of the p... View full abstract»

• ### Head and Media Challenges for 3 Tb/in $^{boldsymbol {2}}$ Microwave-Assisted Magnetic Recording

Publication Year: 2014, Article Sequence Number: 3001008
Cited by:  Papers (5)
| | PDF (1728 KB) | HTML

A specific design for microwave assisted magnetic recording (MAMR) at about 3 Tb/in2 (0.47 Tb/cm2 or 4.7 Pb/m2) is discussed in detail to highlight the challenges of MAMR and to contrast its requirements with conventional perpendicular magnetic recording (PMR). In particular, it has been determined that MAMR-optimized media should have: higher damping than today's ... View full abstract»

• ### Feasibility Analysis of On-Wafer Microfocal Lens for Optical Coupling in Heat-Assisted Magnetic Recording Systems

Publication Year: 2014, Article Sequence Number: 3202105
Cited by:  Papers (3)
| | PDF (952 KB) | HTML

An on-wafer microfocal lens was previously reported to assist external optical coupling in heat-assisted magnetic recording (HAMR) systems. In this paper, we report a thorough analysis of lens performance over the range of industry practical wavelengths (400-830 nm) with discussion on the beam polarization dependence. Manufacturing tolerance of the on-wafer microfocal lens is also evaluated based ... View full abstract»

• ### Design Modifications to Improve the Antishock Performance of a Stamped Base for a 2.5-in HDD

Publication Year: 2014, Article Sequence Number: 3301604
Cited by:  Papers (1)
| | PDF (903 KB) | HTML

This paper presents a modified design for a stamped base for a 2.5-in hard disk drive (HDD). A stamped base is a thinner thickness and lower stiffness than a die-casting base. To improve shock performance of the stamped base, the finite element (FE) model of the HDD is constructed. Then, the FE model was verified by modal analysis. Drop test was performed to confirm the shock simulation model. Par... View full abstract»

• ### Thermal Protrusion-Induced Air Bearing Slider Instability at Disk Proximity and Light Contact

Publication Year: 2014, Article Sequence Number: 3301707
Cited by:  Papers (6)
| | PDF (946 KB) | HTML

As the head-disk spacing is locally reduced to a few nanometers by the introduction of thermal fly-height control sliders, the instability of the flying slider at disk proximity and the detection of slider-disk contacts are of fundamental importance. Slider-disk contacts have been reported in several component-level experimental studies by observing an increase in averaged acoustic emission or las... View full abstract»

• ### Improvement of Surface Waves Attenuation Performance With a Magnetic Thin Film Loading

Publication Year: 2014, Article Sequence Number: 4004705
| | PDF (489 KB) | HTML

In this paper, the propagation property of surface electromagnetic waves of a composite structure realized by a grounded dielectric slab covered by a magnetic thin film is analyzed. Based on the method that the magnetic thin film is modeled with the impedance boundary condition, the transcendental equations are derived and are solved using iterative techniques. The attenuations of surface waves ar... View full abstract»

• ### Compact Modeling of a Magnetic Tunnel Junction Based on Spin Orbit Torque

Publication Year: 2014, Article Sequence Number: 4100208
Cited by:  Papers (12)
| | PDF (1417 KB) | HTML

High endurance, high speed, scalability, low voltage, and CMOS-compatibility are the ideal attributes of memories that any integrated circuit designer dreams about. Adding non-volatility to all these features makes the magnetic tunnel junctions (MTJs) an ultimate candidate to efficiently build a hybrid MTJ/CMOS technology. Two-terminal MTJs based on spin-transfer torque (STT) switching have been i... View full abstract»

• ### Beat Interferences in Fundamental Mode Orthogonal Fluxgates

Publication Year: 2014, Article Sequence Number: 4100305
Cited by:  Papers (4)
| | PDF (791 KB) | HTML

Fundamental mode orthogonal fluxgates (FM-OFGs) can be made very thin so that one can assemble them in an array to image magnetic field distributions. The dc-biased ac excitation current is fed to the U-shaped wire core of the sensor head; therefore, one can enclose the area by the excitation of the current path, which is made small. Due to the high sensitivity of FM-OFG, tiny but substantial (sev... View full abstract»

• ### Catheter Position Tracking System Using Planar Magnetics and Closed Loop Current Control

Publication Year: 2014, Article Sequence Number: 5100209
Cited by:  Papers (9)
| | PDF (1767 KB) | HTML

This paper presents an electromagnetic system for five degrees of freedom position and orientation sensing with application in a virtual bronchoscopy system. Planar magnetic source coils were manufactured on printed circuit boards for reproducibility and low-cost manufacturing. The exact magnetic field of each coil is calculated using a filament-based approach. A constant ac current amplifier is u... View full abstract»

• ### Safety Investigation of a Magnetic Pulse Applicator for Heart Stimulation

Publication Year: 2014, Article Sequence Number: 5100308
Cited by:  Papers (1)
| | PDF (1544 KB) | HTML

The safety area around the applicator of a high current pulse generator, able to magnetically stimulate the human heart, is characterized in terms of allowable induced current. The magnetic field produced by the adopted coil is computed using a complete analytical model to determine the limit area allowed for medical operators. The International Commission on Non-Ionizing Radiation Protection reco... View full abstract»

• ### A Novel Electromagnetic Actuation System for Magnetic Nanoparticle Guidance in Blood Vessels

Publication Year: 2014, Article Sequence Number: 5100412
Cited by:  Papers (14)
| | PDF (4978 KB) | HTML

Targeted drug delivery using magnetic nanoparticles (MNPs) is a new therapeutic method and is being improved continually. However, recent improvements have focused mainly on the introduction and synthesis of special drugs and there are still limitations getting a drug to desired locations in the body, primarily owing to the small size of nanoparticles and the difficulty of controlling their moveme... View full abstract»

• ### Toward the Optimization of D-Shaped Coils for the Use in an Open Magnetic Particle Imaging Scanner

Publication Year: 2014, Article Sequence Number: 5100507
Cited by:  Papers (1)
| | PDF (4459 KB) | HTML

Magnetic particle imaging (MPI) is a novel medical imaging modality that allows for the quantitative detection of superparamagnetic iron oxide nanoparticles using static and oscillating magnetic fields. Essential aspects in the coil optimization for MPI include the magnetic field generated per unit current and the magnetic field homogeneity. For a set of D-shaped coils, which can be used in an ope... View full abstract»

• ### Application Worthy SPIONs: Coated Magnetic Nanoparticles

Publication Year: 2014, Article Sequence Number: 5200306
Cited by:  Papers (1)
| | PDF (1221 KB) | HTML

Superparamagnetic iron oxide nanoparticles (SPIONs) made using magnetite (Fe3O4) are among the various important nanosystems under active investigation for biological applications. Various characterization techniques are required to judge the quality and application worthiness of magnetic nanoparticles (NPs). Magnetite NPs were synthesized by thermal decomposition method usin... View full abstract»

• ### Switching Properties in Magnetic Tunnel Junctions With Interfacial Perpendicular Anisotropy: Micromagnetic Study

Publication Year: 2014, Article Sequence Number: 7100305
Cited by:  Papers (15)
| | PDF (2088 KB) | HTML

The role of universal memory can be successfully satisfied by magnetic tunnel junctions (MTJs) where the writing mechanism is based on spin-transfer torque (STT). An improvement in the switching properties (lower switching current density maintaining the thermal stability) has been achieved in MTJs with interfacial perpendicular anisotropy (IPA) at the interface between CoFeB and MgO. In this pape... View full abstract»

• ### Micromagnetic Evaluation of Size Effects on the Critical Curves of Synthetic Antiferromagnetic Structures

Publication Year: 2014, Article Sequence Number: 7100405
| | PDF (1130 KB) | HTML

In many applications in which synthetic antiferromagnetic (SAF) structures are used, the most intricate problem is to design a magnetic field sequence to safely switch the AF coupled magnetic moments. In this paper, we analyze the switching of a SAF structure under a magnetic field pulse using the concept of critical curve (CC). To observe the size effects on the CCs, we have used a full micromagn... View full abstract»

• ### An Adaptive Radial Point Interpolation Meshless Method for Simulation of Electromagnetic and Optical Fields

Publication Year: 2014, Article Sequence Number: 7200308
Cited by:  Papers (3)
| | PDF (1573 KB) | HTML

This paper is going to handle an adaptive meshless method by which a wide range of microwave problems in terms of frequency are numerically solved whose accuracy and computational time are acceptable with respect to some other numerical schemes. As the origin, in the process of imposing the conventional radial point interpolation method (CRPIM) to laser problems, a special function was found, whic... View full abstract»

• ### Calculation of Ionized Field of HVDC Transmission Lines by the Meshless Method

Publication Year: 2014, Article Sequence Number: 7200406
Cited by:  Papers (5)
| | PDF (929 KB) | HTML

In this paper, the meshless method is used to calculate the ion flow field under the high-voltage direct current transmission lines for the first time. The meshless local Petorv-Galerkin method is employed to solve Poisson's equation, and the upwind meshless method is applied to solve the current continuity equation. After the validity of the method is tested, the distribution of electric field an... View full abstract»

• ### 2-D Analytical Subdomain Model of a Slotted PMSM With Shielding Cylinder

Publication Year: 2014, Article Sequence Number: 8101410
Cited by:  Papers (18)
| | PDF (1778 KB) | HTML

Due to their high efficiency and power density, permanent magnet synchronous machines (PMSMs) operating at high speed have recently gained a lot of attention. The development of high-speed PMSMs requires a good understanding of the physics related to the operation of such machines. Moreover, accurate modeling tools are needed when designing high-speed electrical machines. In this paper, the subdom... View full abstract»

• ### Analytical Modeling of Surface-Mounted PM Machines Accounting for Magnet Shaping and Varied Magnet Property Distribution

Publication Year: 2014, Article Sequence Number: 8101511
Cited by:  Papers (12)
| | PDF (3152 KB) | HTML

This paper develops an analytical model for predicting the magnetic field, back-electromotive force (EMF), and electromagnetic torque of surface-mounted permanent magnet machines accounting for magnet geometrical shaping and varied magnet property distribution. The magnets on the rotor are represented by the remanence, thickness, and magnetization direction functions. They are finitely segmented i... View full abstract»

• ### Comparative Studies of Modular and Unequal Tooth PM Machines Either With or Without Tooth Tips

Publication Year: 2014, Article Sequence Number: 8101610
Cited by:  Papers (12)
| | PDF (2260 KB) | HTML

This paper presents four types of three-phase permanent magnet (PM) machines, that is, modular and unequal teeth (UNET) machines either with or without tooth tips. Two-dimensional finite element (FE) modeling has been carried out to analyze the influences of flux gaps (in alternate stator teeth) and UNET widths. These influences are mainly on winding factors, air-gap flux density due to PMs, flux ... View full abstract»

## 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