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# IEEE Magnetics Letters

## Volume 2: 2011

About the Cover: For more information on Louis Néel, please see Cover 3 (back, inside cover).

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

Publication Year: 2011, Article Sequence Number: 0000101
| PDF (8639 KB)
• ### IEEE Magnetics Society Information

Publication Year: 2011, Article Sequence Number: 0000201
| PDF (39 KB)
• ### Table of contents

Publication Year: 2011, Article Sequence Number: 0000302
| PDF (139 KB)
• ### IEEE Magnetics Letters Publication Information

Publication Year: 2011, Article Sequence Number: 0000401
| PDF (31 KB)
• ### Blank page [back cover]

Publication Year: 2011, Article Sequence Number: 0000501
| PDF (5 KB)
• ### Numeric Simulations of a Novel Wideband Electromagnetic Band Gap Metamaterial Utilizing Oriented Cobalt-Substituted Z-Type Barium Hexaferrites

Publication Year: 2011, Article Sequence Number: 0500104
Cited by:  Papers (10)
| | PDF (399 KB) | HTML

The material parameters of an electromagnetic bandgap (EBG) metamaterial consisting of metallic Sievenpiper structures prepared upon a Co2Z hexaferrite substrate having μr = 12 to 14 and εr = 10 to 12 are reported. A bandwidth of 50%-75% of L-band was realized in simulation. The synthesis of the Co2Z hexaferrite material with optimized properties w... View full abstract»

• ### Improved Sensitivity and Noise in Magneto-Electric Magnetic Field Sensors by Use of Modulated AC Magnetostriction

Publication Year: 2011, Article Sequence Number: 2500104
Cited by:  Papers (26)  |  Patents (2)
| | PDF (459 KB) | HTML

A magnetic field sensor based on the nonlinear nature of the magnetostrictive response of a magneto-electric (ME) heterostructure has two orders of magnitude improvement in sensitivity and signal-to-noise ratio compared with a conventional dc-biased configuration. The sensor consists of a longitudinally magnetized and transversely poled lamination of iron-cobalt-boron (Metglas) and lead zirconate ... View full abstract»

• ### Spin-Torque Nano-Oscillator as a Microwave Signal Source

Publication Year: 2011, Article Sequence Number: 3000104
Cited by:  Papers (19)  |  Patents (1)
| | PDF (240 KB) | HTML

We evaluate a possibility to use spin-torque nano-oscillators (STNOs) and oscillator arrays as new sources of microwave signals for telecommunication devices. The microwave signal generated by STNO can be received as oscillation of the device magnetoresistance (MR) or as direct electromagnetic emission of two effective magnetic dipoles. We calculate the dipolar microwave power emitted by STNO in f... View full abstract»

• ### Demonstration of Ultralow Bit Error Rates for Spin-Torque Magnetic Random-Access Memory With Perpendicular Magnetic Anisotropy

Publication Year: 2011, Article Sequence Number: 3000204
Cited by:  Papers (45)  |  Patents (6)
| | PDF (495 KB) | HTML

Bit error rates below 10-11 are reported for a 4-kb magnetic random access memory chip, which utilizes spin transfer torque writing on magnetic tunnel junctions with perpendicular magnetic anisotropy. Tests were performed at wafer level, and error-free operation was achieved with 10 ns write pulses for all nondefective bits during a 66-h test. Yield in the 4-kb array was limited to 99% ... View full abstract»

• ### Domain Structure in CoFeB Thin Films With Perpendicular Magnetic Anisotropy

Publication Year: 2011, Article Sequence Number: 3000304
Cited by:  Papers (45)
| | PDF (447 KB) | HTML

Domain structures in CoFeB-MgO thin films with a perpendicular easy magnetization axis were observed by magneto-optic Kerr-effect microscopy at various temperatures. The domain-wall surface energy was obtained by analyzing the spatial period of the stripe domains and fitting established domain models to the period. In combination with superconducting quantum interference device measurements of mag... View full abstract»

• ### Analysis and Design of Hanle-Effect Spin Transistors at 300 K

Publication Year: 2011, Article Sequence Number: 3000404
Cited by:  Papers (4)
| | PDF (524 KB) | HTML

We propose a new Hanle-effect device based on a MOSFET type of spin transistor to reveal the dynamics of spin-polarized electron transport in the Si MOS inversion channel. The proposed device has the ability to detect spin signals with high sensitivity and to distinguish spin transport signals from other, spurious signals. Spin transport behavior induced by the Hanle effect in the device were theo... View full abstract»

• ### Asymmetric Interfacial Perpendicular Magnetic Anisotropy in Pt/Co/Pt Trilayers

Publication Year: 2011, Article Sequence Number: 3000504
Cited by:  Papers (38)
| | PDF (353 KB) | HTML

An asymmetry in the interfacial anisotropies of Pt/Co and Co/Pt interfaces was observed in Pt/Co/Pt sputtered trilayers, the interfacial anisotropy arising from the bottom Pt/Co interface being significantly higher than that from the top Co/Pt one. Interdiffusion at the top interface is believed to be the main factor for this asymmetry. It dramatically decreases the anisotropy of the stack when th... View full abstract»

• ### Influence of Periodic Patterning on the Magnetization Response of Micromagnetic Structures

Publication Year: 2011, Article Sequence Number: 3500104
| | PDF (491 KB) | HTML

The magnetization response of single, patterned, thin-film Permalloy (Ni_80Fe_20, Py) elements embedded in a coplanar waveguide (CPW) is investigated. The anisotropic magnetoresistance (AMR) effect serves as the detection mechanism in current-modulated differential resistance (dV/ dI) and rectification effect measurements, which reveal magnetization dynamics over a broad frequency range. Different... View full abstract»

• ### Two-Bit-Per-Dot Patterned Media for Magnetic Storage

Publication Year: 2011, Article Sequence Number: 4500104
Cited by:  Papers (1)
| | PDF (359 KB) | HTML

Bit-patterned recording media are made of arrays of physically separated magnetic nanodots, each nanodot carrying one bit of information. We demonstrate that by stacking perpendicular-to-plane and in-plane magnetized thin films within each magnetic dot, it is possible to obtain a 2-bit-per-dot multilevel magnetic recording system without penalty to the readout signal-to-noise ratio. The stray fiel... View full abstract»

• ### Ferrimagnetic Sr$_{1.5}$Ba $_{0.5}$Zn$_2$Fe $_{12}$ O$_{22}$ (Zn-Y) Single Crystal With Planar Anisotropy

Publication Year: 2011, Article Sequence Number: 5000104
Cited by:  Papers (3)
| | PDF (443 KB) | HTML

Single crystals of Sr1.5Ba0.5Zn2Fe12O22 were grown from the flux systems of BaCO3, SrCO3, and Na2CO3 by a high temperature, slow cooling, flux method. X-ray diffraction confirmed that the crystal structure is an extended single crystalline array of Zn-Y composition with an in-plane easy axis crystall... View full abstract»

• ### M-type Hexaferrite for Gigahertz Chip Antenna Applications

Publication Year: 2011, Article Sequence Number: 5000204
Cited by:  Papers (3)
| | PDF (333 KB) | HTML

We demonstrate that Sn/Zn-substituted strontium M-type hexaferrite (SrSn2.5Zn2.5Fe7O19 = Sn/Zn-SrM) can provide high performance and a uniform radiation pattern over a wide frequency band for gigahertz chip-antenna applications. Saturation magnetization and coercivity were 68.5 emu/g and 46 Oe. Real parts of permeability and permittivity were 1.37 (loss ... View full abstract»

• ### An In Situ Anneal Study of Graded Anisotropy FePtCu Films

Publication Year: 2011, Article Sequence Number: 5500104
Cited by:  Papers (7)
| | PDF (470 KB) | HTML

We provide a detailed study of how the anisotropy (Ku) gradient in a compositionally graded FePtCu film gradually develops as a function of the postannealing temperature (TA). By utilizing the in situ annealing and magnetic characterization capabilities of a physical property measurement system, the evolution of the induced Ku gradient is elucidated. For low T... View full abstract»

• ### Electrical and Mechanical Manipulation of Ferromagnetic Properties in Polycrystalline Nickel Thin Film

Publication Year: 2011, Article Sequence Number: 6000104
Cited by:  Papers (19)
| | PDF (441 KB) | HTML

The ferromagnetic properties of a 35 nm polycrystalline nickel thin film deposited on a single-crystal, optical, ferroelectric lithium niobate substrate are magnetoelectrically tunable. The coercive field of the nickel film, which has low magnetocrystalline anisotropy and appropriate magnetoelasticity, changes by about 80% owing to the anisotropic strain produced by the substrate. In addition, mec... View full abstract»

• ### Resonance-Based Wireless Energizing of Piezoelectric Components

Publication Year: 2011, Article Sequence Number: 6000204
Cited by:  Papers (2)
| | PDF (404 KB) | HTML

A new technique of wirelessly transmitting electric energy to piezoelectric components is explored. The proposed method improves energy transfer efficiency by using the strongly coupled magnetic resonance as well as the mechanical resonance of the piezoelectric component. In the design, a printed spiral receiving coil connected across the piezoelectric component is used to capture energy wirelessl... View full abstract»

• ### Novel Silicon-Embedded Coreless Transformer for On-Chip Isolated Signal Transfer

Publication Year: 2011, Article Sequence Number: 6500103
Cited by:  Papers (7)
| | PDF (449 KB) | HTML

In this letter, a novel silicon-embedded coreless transformer is proposed and demonstrated. The transformer is fabricated in the thick bottom layer of a silicon substrate and connected to the frontside through vias opened in the thin top layer where all other components of the system can be fabricated. A 5-turn coreless transformer fabricated using this monolithic transformer technology achieves a... View full abstract»

• ### Discrete Cosine Transform Technique for Measuring Domain Widths in Magneto-Optic Garnet Films

Publication Year: 2011, Article Sequence Number: 6500204
| | PDF (356 KB) | HTML

One use of engineered magneto-optic garnet thin films is to visualize magnetic patterns with high spatial resolution. Of these engineered films, films with out-of-plane anisotropy exhibiting a stripe domain pattern are found to work well for resolving patterns in digital storage magnetic media. The width of the stripe domains in garnet films has become a performance metric for the films' ability t... View full abstract»

• ### 2011 Index IEEE Magnetics Letters Vol. 2

Publication Year: 2011, Article Sequence Number: 9500105
| PDF (76 KB)
• ### Advertisement - Scitopia.org

Publication Year: 2011, Article Sequence Number: 9500201
| PDF (149 KB)
• ### Why we joined [Advertisement]

Publication Year: 2011, Article Sequence Number: 9500301
| PDF (205 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