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# IEEE Magnetics Letters

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Displaying Results 1 - 25 of 27
• ### Early History of the IEEE Magnetics Society and Introduction to IEEE Magnetics Letters

Publication Year: 2010, Article Sequence Number: 0000104
| | PDF (335 KB)

The IEEE Magnetics Group came into existence two years after the American Institute of Electrical Engineers and the Institute of Radio Engineers merged to form the Institute of Electrical and Electronics Engineers. Since the establishment of IEEE Transactions on Magnetics, scholarly publishing has been one of the organization's major activities. A new electronic journal, IEEE Magnetics Letters, fo... View full abstract»

• ### IEEE Magnetics Society Information

Publication Year: 2010, Article Sequence Number: 0000201
| PDF (39 KB)

Publication Year: 2010, Article Sequence Number: 0000302
| PDF (93 KB)
• ### IEEE Magnetics Letters Publication Information

Publication Year: 2010, Article Sequence Number: 0000401
| PDF (27 KB)
• ### Blank page [back cover]

Publication Year: 2010, Article Sequence Number: 0000501
| PDF (5 KB)
• ### Front cover

Publication Year: 2010, Article Sequence Number: 0000601
| PDF (448 KB)
• ### Novel Design, Characterization, and Control Method for Large Motion Range Magnetic Levitation

Publication Year: 2010, Article Sequence Number: 0500104
Cited by:  Papers (5)
| | PDF (622 KB) | HTML

This letter describes a method to quickly calculate the coil current to force and torque transformations required for levitation of cylindrical magnets above a given array of cylindrical coils, and evaluate the feasibility, efficiency, dynamic performance, and stability of the resulting design. This method has been used to develop levitation systems for one or two magnets with translation ranges g... View full abstract»

• ### Common Mode Analysis of Ethernet Transformers

Publication Year: 2010, Article Sequence Number: 0500204
Cited by:  Papers (2)
| | PDF (293 KB) | HTML

In this letter, a distributed model for Ethernet transformers subject to common mode signals is developed. Explicit formulas for transfer functions are derived and illustrated by numerical examples. View full abstract»

• ### Parameters for Optimizing the Forces Between Linear Multipole Magnet Arrays

Publication Year: 2010, Article Sequence Number: 0500304
Cited by:  Papers (6)
| | PDF (208 KB) | HTML

Multipole magnet arrays have the potential to achieve greater forces than homogeneous magnets for linear spring applications. This letter investigates the effects of varying key parameters of linear multipole magnet arrays in relation to their force-bearing potential. Equal sized arrays in repulsive configurations are vertically displaced to each other; only vertical forces are compared. The force... View full abstract»

• ### Switchable Cell Trapping Using Superparamagnetic Beads

Publication Year: 2010, Article Sequence Number: 1500104
Cited by:  Papers (18)
| | PDF (303 KB) | HTML

Ni81Fe19 microwires are investigated as the basis of a switchable template for positioning magnetically labeled neural Schwann cells. Magnetic transmission X-ray microscopy and micromagnetic modeling show that magnetic domain walls can be created or removed in zigzagged structures by an applied magnetic field. Schwann cells containing superparamagnetic beads are trapped by th... View full abstract»

• ### Pseudo Spin Valves Using a (1 1 2)-Textured D0$_{22}$ Mn$_{2.3-2.4}$Ga Fixed Layer

Publication Year: 2010, Article Sequence Number: 2500104
Cited by:  Papers (11)
| | PDF (433 KB) | HTML

We demonstrate pseudo spin valves (PSVs) with a (112)-textured D022 Mn2.3-2.4Ga (MnGa) tilted magnetization fixed layer and an in-plane CoFe free layer. Single D022 MnGa films exhibit a small magnetoresistance (MR) typically observed in metals. In MnGa/Cu/CoFe PSVs, a transition from a negative (-0.08%) to positive (3.88%) MR is realized by introducing a thin spin ... View full abstract»

• ### Electric Tuning of Ferromagnetic Resonances in Hexagonal-Barium-Ferrite/Barium-Strontium-Titanate Heterostructures

Publication Year: 2010, Article Sequence Number: 2500204
Cited by:  Papers (2)
| | PDF (220 KB) | HTML

This letter reports the first demonstration of a monolithic heterostructure with a large electric tuning of the ferromagnetic resonance (FMR) at millimeter-wave frequencies. The structure is composed of a barium-strontium-titanate (BST) film and two thin platinum electrodes, all grown on a barium ferrite slab with in-plane uniaxial anisotropy. The electric tuning of the FMR responses around 60 GHz... View full abstract»

• ### Spin-Wave Instabilities in Spin-Transfer-Driven Magnetization Dynamics

Publication Year: 2010, Article Sequence Number: 3000104
Cited by:  Papers (6)
| | PDF (228 KB) | HTML

We study the stability of magnetization precessions induced in spin-transfer devices by the injection of spin-polarized electric currents. Instability conditions are derived by introducing a generalized, far-from-equilibrium interpretation of spin waves. It is shown that instabilities are generated by distinct groups of magnetostatically coupled spin waves. Stability diagrams are constructed as a ... View full abstract»

• ### Comparison of Synthetic Antiferromagnets and Hard Ferromagnets as Reference Layer in Magnetic Tunnel Junctions With Perpendicular Magnetic Anisotropy

Publication Year: 2010, Article Sequence Number: 3000204
Cited by:  Papers (28)  |  Patents (8)
| | PDF (301 KB) | HTML

In magnetic tunnel junctions (MTJ), synthetic antiferromagnets (SAF) are usually used as reference layer to minimize dipolar interactions induced between this layer and the free layer (FL). We show here that the use of SAF allows us to reduce the asymmetry of the FL reversal due to stray fields in nanosized MTJs with perpendicular magnetic anisotropy. View full abstract»

• ### Finite Element Modeling of Charge- and Spin-Currents in Magnetoresistive Pillars With Current Crowding Effects

Publication Year: 2010, Article Sequence Number: 3000304
Cited by:  Papers (2)
| | PDF (494 KB) | HTML

Charge- and spin-diffusion equations, taking into account spin-diffusion and spin-transfer torque, were numerically solved using a finite element method in complex noncollinear geometry. As an illustration, this approach was used to study the spin-dependent transport in a two-dimensional model giant magnetoresistance metallic pillar sandwiched between extended electrodes as is the case in magnetor... View full abstract»

• ### Local Excitation of Ferromagnetic Resonance and Its Spatially Resolved Detection With an Open-Ended Radio-Frequency Probe

Publication Year: 2010, Article Sequence Number: 3500104
Cited by:  Papers (5)  |  Patents (1)
| | PDF (383 KB) | HTML

A local excitation of ferromagnetic resonance (FMR) and its detection were performed by using an open-ended radio-frequency (RF) probe. The RF probe is composed of a coaxial cable transmitting broadband RF waves over 10 GHz and a sharp metal tip attached to its end. In the reflection spectrum (S 11) taken on a polycrystalline yttrium iron garnet disk, three kinds of FMR absorptio... View full abstract»

• ### Unidirectional Magnetization Relaxation in Exchange-Biased Films

Publication Year: 2010, Article Sequence Number: 3500204
Cited by:  Papers (7)
| | PDF (246 KB) | HTML

The magnetization relaxation of thin ferromagnetic Ni81Fe19 films in close proximity and in direct contact with antiferromagnetic FeMn films was investigated using broadband ferromagnetic resonance. For unbiased films, a contribution to the effective-damping parameter αeff inversely proportional to the ferromagnetic film thickness is found, consistent... View full abstract»

• ### Low-Gas-Pressure Sputtering of CoPtCr–$hbox{SiO}_2$ Granular Films Made by a Sintered Target Without $hbox{SiO}_2$ Powder

Publication Year: 2010, Article Sequence Number: 4500104
Cited by:  Papers (2)
| | PDF (545 KB) | HTML

A new low-Ar-gas-pressure (PAr) sputtering process is proposed for the preparation of granular metal-oxide films for use as perpendicular magnetic recording media. CoO and CoSi powders were used as the raw materials of the sintered target rather than SiO2 powder to obtain the O/Si ratio to 2 in a granular film under low PAr process. Strongly exchange-... View full abstract»

• ### Conversion of Worm-Shaped Antiferromagnetic Hematite to Ferrimagnetic Spherical Barium-Ferrite Nanoparticles for Particulate Recording Media

Publication Year: 2010, Article Sequence Number: 4500204
Cited by:  Papers (5)
| | PDF (465 KB) | HTML

We used a modified, two-step hydrothermal process to produce worm-shaped antiferromagnetic hematite-barium iron oxide particles and converted them to 25-45 nm spherical ferrimagnetic barium-ferrite (S-BaFe) nanoparticles for high-density magnetic recording media application. Saturation magnetization and coercivity of the S-BaFe nanoparticles were 50.7 emu/g and 4311 Oe, respectively. The thermal s... View full abstract»

• ### Miniaturized T-DMB Antenna With a Low–Loss Ni–Mn–Co Ferrite for Mobile Handset Applications

Publication Year: 2010, Article Sequence Number: 5000104
Cited by:  Papers (16)
| | PDF (602 KB) | HTML

In this paper, a low-loss Ni-Mn-Co ferrite (Ni0.76Mn0.24-xCoxFe2O4 with x = 0-0.04) has been developed for miniaturization and performance improvement of mobile handset antennas. The developed ferrite material has almost equal permittivity and permeability of 7-9, as well as sufficiently low dielectric and magnetic loss tangent less than 0.001... View full abstract»

• ### Effect of FeCoB-SiO $_2$-Film-Based Fractal Frequency Selective Surface on the Absorption Properties of Microwave Absorbers

Publication Year: 2010, Article Sequence Number: 5000204
Cited by:  Papers (5)
| | PDF (341 KB) | HTML

The effects of FeCoB-SiO2 -film-based fractal frequency selective surface (FSS) on the absorption properties of multilayer microwave absorbers (MMA) were investigated in detail. These magnetic films were prepared in argon pressure by radio frequency magnetron sputtering targets of SiO2 and Fe40Co40B20. Laser etching was used to fabricate FSS s... View full abstract»

• ### Irrecoverable and Recoverable Resistivity Resulting From the First Order Magnetic-Structural Phase Transition in Gd $_5$(Si $_x$Ge$_{1-x}$)$_4$

Publication Year: 2010, Article Sequence Number: 6000104
Cited by:  Papers (9)  |  Patents (1)
| | PDF (102 KB) | HTML

An irreversible change in resistivity occurs in Gd5(SixGe1- x)4 at the first-order phase transformation each time the material is cycled through its transition. This results in a progressive increase in resistivity each time the material is cycled through the transition and returned to its initial conditions of temperature and magnetic field. The effe... View full abstract»

• ### Ultrahigh Coercivity Magnetic Force Microscopy Probes to Analyze High-Moment Magnetic Structures and Devices

Publication Year: 2010, Article Sequence Number: 6500104
Cited by:  Papers (4)
| | PDF (336 KB) | HTML

This letter addresses the fabrication and exploitation of ultrahigh coercivity magnetic force microscopy (MFM) probes to characterize high-magnetic moment nanostructures and devices. The L10 phase of FePt alloys together with CrRu and MgO seed layers are investigated as a method of increasing the coercivity of MFM probes to prevent their behavior as soft magnetic probes when used to ima... View full abstract»

• ### Maximizing the Force Between Two Cuboid Magnets

Publication Year: 2010, Article Sequence Number: 9000102
Cited by:  Papers (3)
| | PDF (132 KB) | HTML

Recently, we wrote that to maximize the force between two magnets of fixed volume, the magnet dimensions should be chosen to be as thin as possible in the direction of magnetization. This was incorrect, and we clarify this point. View full abstract»

• ### 2010 Index IEEE Magnetics Letters Vol. 1

Publication Year: 2010, Article Sequence Number: 9500106
| PDF (366 KB)

## Aims & Scope

IEEE Magnetics Letters is a peer-reviewed, archival journal covering the physics and engineering of magnetism, magnetic materials, applied magnetics, design and application of magnetic devices, bio-magnetics, magneto-electronics, and spin electronics.

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## Meet Our Editors

Editor
Ron B. Goldfarb
National Institute of Standards and Technology