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# IEEE Magnetics Letters

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Displaying Results 1 - 25 of 94
• ### Front Cover

Publication Year: 2016, Article Sequence Number: 0000101
| PDF (1574 KB)
• ### IEEE Magnetics Society Information

Publication Year: 2016, Article Sequence Number: 0000201
| PDF (57 KB)
• ### IEEE Magnetics Letters publication information

Publication Year: 2016, Article Sequence Number: 0000301
| PDF (203 KB)

Publication Year: 2016, Article Sequence Number: 0000401
| PDF (66 KB) | HTML

Publication Year: 2016, Article Sequence Number: 0100102
| PDF (104 KB)
• Editorial
• ### Visualization and Interpretation of Magnetic Configurations Using Magnetic Charge

Publication Year: 2016, Article Sequence Number: 1108505
| | PDF (286 KB) | HTML

The calculation and graphic imaging of magnetic charge density provides fresh insights into old problems in micromagnetics. (1) The full saturation magnetization Ms of polycrystalline iron can be used in a transformer when magnetic charge at the grain boundaries suppresses the adverse effects of anisotropy. A single domain wall separates two regions of opposite magnetization |M| = M View full abstract»

• Electromagnetics
• ### Demagnetizing Factors for a Hollow Sphere

Publication Year: 2016, Article Sequence Number: 1300104
| | PDF (237 KB) | HTML

The demagnetization problem for a hollow sphere of inner radius a, outer radius b, and material susceptibility χ is solved analytically. As a/b increases from 0 to 1, the magnetometric demagnetizing factor Nm decreases from 1/3 when χ > 0 and increases from 1/3 when χ <; 0. In the limit a/b = 1, Nm decreases from 1 to 0 as χ increases from -1... View full abstract»

• ### Transportation of Static Magnetic Fields by a Practically Realizable Magnetic Hose

Publication Year: 2016, Article Sequence Number: 1300304
Cited by:  Papers (1)
| | PDF (295 KB) | HTML

A practically realizable magnetic hose, constructed by wrapping a ferromagnetic cylinder with an alternating superconductor-ferromagnet (SC-FM) heterostructure, was developed and its capability to transfer the static magnetic fields, e.g., generated by a Nd-Fe-B magnet, is examined. A diverse dependence of the transfer efficiency on the diameter of the inner cylinder was found in the magnetic hose... View full abstract»

• ### Calculation of Magnetization and Permeability Tensor of a Partially Magnetized Cylindrical Ferrite Resonator

Publication Year: 2016, Article Sequence Number: 1301904
Cited by:  Papers (2)
| | PDF (512 KB) | HTML

A accurate method of calculating a magnetization and permeability tensor of ferrites is proposed in this paper. We introduce a cylindrical ferrite resonator that is located between parallel metal plates. We theoretically derive exact eigenvalue equations for the mode-splitting phenomenon of the HE111 mode. We also show that the mode-splitting behavior depends on a single magnetization v... View full abstract»

• ### Steinmetz Equation for Gapped Magnetic Cores

Publication Year: 2016, Article Sequence Number: 1302704
Cited by:  Papers (1)
| | PDF (416 KB) | HTML

This letter presents a derivation of the modified Steinmetz empirical equation for power loss density and power loss in magnetic cores with air gaps. The modified Steinmetz equation relates the core power loss density with the air gap length, magnitude and frequency of the sinusoidal excitation current, and the permeability of the core material. The reluctance model of a representative core struct... View full abstract»

• ### Scaling Law for AC Susceptibility of a Conducting Strip With a Power-Law Dependence of Electric Field on Sheet Current Density

Publication Year: 2016, Article Sequence Number: 1303704
Cited by:  Papers (1)
| | PDF (408 KB) | HTML

The perpendicular ac susceptibility χ = χ' - jχ" of a conducting thin strip of width 2a obeying a power-law dependence of electric field on sheet current density E/Ec = (K/Kc)|K/Kc|n-1 with n ≥ 1 is calculated as a function of the field amplitude Hm and frequency ω. A scaling law is deduced which states that ... View full abstract»

• ### Calculation of Torque Performance of a Novel Magnetic Planetary Gear

Publication Year: 2016, Article Sequence Number: 1303805
| | PDF (2140 KB) | HTML

In this letter, an efficient energy-based methodology is proposed for calculating the torque performance of a novel magnetic planetary gear. To verify the proposed method and the gear performance, a prototype was also constructed and experimentally evaluated. It shows good agreement between the predicted and measured torque performance. The new gear topology demonstrates higher torque capability t... View full abstract»

• ### Scaling Law for AC Susceptibility of a Superconducting Strip with a Power-Law Dependence of Electric Field on a Magnetic-Field-Dependent Sheet Current Density

Publication Year: 2016, Article Sequence Number: 1304604
| | PDF (559 KB) | HTML

The perpendicular ac susceptibility $chi=chi^{prime}-jchi^{primeprime}$ of a superconducting thin strip of width $2a$ obeying a power-law dependence of electric field on sheet current density $E/E_c=(K/K_c)vert K/K... View full abstract» • ### Thickness Assessment of Thermal Barrier Coatings of Aeroengine Blades Via Dual-Frequency Eddy Current Evaluation Publication Year: 2016, Article Sequence Number: 1304905 | | PDF (951 KB) | HTML A thermal barrier coating (TBC), consisting of the top and bond coatings, is normally deployed over the alloying body of an aeroengine blade in order to protect the blade from hostile environments. Thickness loss of TBC severely undermines the structural integrity of blades, and thus leads to the failure of aeroengines. Before catastrophic accidents occur, it is important to nonintrusively assess ... View full abstract» • ### Transportation of Quasistatic Magnetic Fields by Superconductor-Ferromagnet Heterostructures Publication Year: 2016, Article Sequence Number: 1305105 Cited by: Papers (1) | | PDF (1914 KB) | HTML We have devised a magnetic circuit for improved transport of quasistatic magnetic fields from a transmitter to a receiver in order to increase the transfer efficiency of electromagnetic devices such as transformers. This novel structure is made by coating a superconductor-ferromagnet heterostructure on a traditionally used magnetic core. We tested the transfer efficiency of the proposed magnetic c... View full abstract» • ### Polymer Magnetic Composite Core Boosts Performance of Three-Dimensional Micromachined Inductive Contactless Suspension Publication Year: 2016, Article Sequence Number: 1307603 | | PDF (460 KB) | HTML Media We introduce a newly developed polymer magnetic composite for use as a high resistivity, high permeability magnetic core to significantly improve the energy consumption of micromachined inductive suspensions. Compared to a similar inductive suspension structure without a core, the electrical current required to obtain a levitation height of 110 μm is 65 mA versus 120 mA. The use of the core... View full abstract» • Magnetism in Solids • ### Large Magnetic Entropy Change in La0.6Ce0.4Fe11.5Si1.5 Alloy Exhibiting First- and Second-Order Phase Transitions Publication Year: 2016, Article Sequence Number: 1401104 | | PDF (587 KB) | HTML A polycrystalline alloy ingot of La0.6Ce0.4Fe11.5Si1.5 was prepared by an arc-melting method. Magnetic measurements of magnetization M as a function of field H and temperature T show a ferromagnetic-paramagnetic phase transition at a Curie temperature TC = 170 K. Interestingly, curves of H/M versus M2 have a positive slope at low field (H ... View full abstract» • ### Diamagnetism of$beta$-Nickel Phthalocyanine (C$_{32}$H$_{16}$N$_{8}\$ Ni) and Effects of Impurities

Publication Year: 2016, Article Sequence Number: 1406804
| | PDF (1742 KB) | HTML

Results from detailed measurements of the magnetization M of a commercial β-nickel phthalocyanine (β-NiPc) powder sample characterized by X-ray diffraction are reported from 2 K to 300 K and in magnetic fields H up to 90 kOe. From the isothermal M vs. H data at several temperatures T, the diamagnetic nature of β-NiPc is established with temperature-independent susceptibility X... View full abstract»

• Biomagnetics
• ### Dose–Response Bioconversion and Toxicity Analysis of Magnetite Nanoparticles

Publication Year: 2016, Article Sequence Number: 1502205
Cited by:  Papers (1)
| | PDF (480 KB) | HTML

Iron oxide nanoparticles are an innovative and promising tool in biomedical research. A prerequisite for clinical applications is a demonstration of safety. Magnetite nanoparticles, 10 nm in diameter, were obtained by thermal decomposition and coated with meso-2,3-dimercaptosuccinic acid (DMSA). The DMSA-coated particles were administered intravenously at dose levels of 2.5, 7.5, and 15 mg Fe/kg b... View full abstract»

• ### Charge Relaxation in Biological Tissues with Extremely High Permittivity

Publication Year: 2016, Article Sequence Number: 1504105
| | PDF (370 KB) | HTML

This letter presents a phenomenological model to describe charge relaxation (and the corresponding screening effect) in biological tissues, i.e., lossy dielectrics where a non-negligible conductivity and an extremely high relative permittivity (on the order of 50 × 106) may coexist. This situation is very peculiar and is not treated in textbooks. The model is used to study an ope... View full abstract»

• ### Micromagnet Conductors for High-Resolution Separation of Magnetically Driven Beads and Cells at Multiple Frequencies

Publication Year: 2016, Article Sequence Number: 1508004
| | PDF (423 KB) | HTML Media

We demonstrate a separation method for complex mixture of superparamagnetic beads using half-disk pathways, under an in-plane rotating magnetic field, which is highly sensitive to the bead size and magnetic susceptibility. The non-linear dynamics of the beads moving along the half-disk pathways at multiple frequencies can be divided into three regimes: a phase-locked regime at low driving frequenc... View full abstract»

• Biomagnetic Particles
• ### Control of Iron Oxide Nanoparticle Clustering Using Dual Solvent Exchange

Publication Year: 2016, Article Sequence Number: 1700904
Cited by:  Papers (1)
| | PDF (443 KB) | HTML

Superparamagnetic iron oxide nanoparticles (SPIOs) have considerable promise for magnetic resonance imaging, drug/gene delivery, and hyperthermia applications. It has been shown recently that self-assembly of SPIOs into large superstructures can have a significant impact on their magnetic properties and functionality. In this work, we developed a novel method for controlling the clustering of SPIO... View full abstract»

• Magnetochemistry
• ### Control of Ferrofluid Droplets in Microchannels by Uniform Magnetic Fields

Publication Year: 2016, Article Sequence Number: 2105305
Cited by:  Papers (5)
| | PDF (687 KB) | HTML

Magnetic droplets are versatile tools for a range of lab-on-a-chip (LoC) applications. The combination of a uniform magnetic field and magnetic droplet offers wireless and programmable manipulation. We performed LoC experiments and numerical studies on ferrofluid droplets under the influence of a uniform magnetic field. The dynamic behavior of flowing ferrofluid droplets was examined. The droplet ... View full abstract»

• ### The Effect of a 0.5 T Magnetic Field on the Photocatalytic Activity of Recyclable Nd-modified BiFeO 3 Magnetic Catalysts

Publication Year: 2016, Article Sequence Number: 2106904
| | PDF (1700 KB) | HTML

Nd-modified BiFeO3 (Bi1-xNdxFeO3, BFO:Nd) nanostructures were synthesized via the hydrothermal method in order to determine their applicability for magnetic-field-assisted photocatalytic degradation of toxic dyes. The structural, optical, and magnetic features of the photocatalysts were investigated by powder X-ray diffraction, high-resolution transmissi... View full abstract»

• ### Magnetic Properties of Cobalt-Based Carbide Particles Synthesized by the Polyol Process

Publication Year: 2016, Article Sequence Number: 2107104
| | PDF (869 KB) | HTML

Single-phase Co carbide particles with the Co3C structure were obtained by the polyol process using tetraethylene glycol (TEG) solution containing polyvinylpyrrolidone (PVP). Additionally, particles with a mixture of face-centered cubic Co and hexagonal close-packed Co were precipitated in the TEG solution without PVP. The particles synthesized with PVP exhibited coercivity of about 5.7... View full abstract»

## 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.

Full Aims & Scope

## Meet Our Editors

Editor
Ron B. Goldfarb
National Institute of Standards and Technology