<![CDATA[ IEEE Transactions on Magnetics - new TOC ]]>
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TOC Alert for Publication# 20 2016July 25<![CDATA[Front cover]]>528C1C1609<![CDATA[IEEE Transactions on Magnetics publication information]]>528C2C288<![CDATA[Table of contents]]>52812221<![CDATA[Effect of Substrate Temperature on Magnetic Properties of Electroplated 82Ni–15Fe–3W Alloy Films]]>528151068<![CDATA[On the Formation and Evolution of Cu–Ni-Rich Bridges of Alnico Alloys With Thermomagnetic Treatment]]>$alpha _{1}$ phases between the $alpha _{2}$ phases. For Alnico containing Ti, a typical chessboardlike morphology with Cu–Ni-rich bridges is observed, whereas in the absence of Ti, the $alpha _{1}$ phases connect to each other readily, especially with a high Co concentration, and a mazelike morphology with Cu-rich white-plate precipitates rather than Cu-rich bridges is observed. Furthermore, in Alnico containing Ti, an inhomogeneous distribution of Ni is found in the $alpha _{2}$ phases, including loops with high Ni concentration surrounding the $alpha _{1}$ phase and high concentrations in the bridges as well. An increase in the Cu concentration is also observed in the loops around the $alpha _{1}$ phases (Ni–Cu loops), and direct contact between the Cu–Ni-rich bridges and the Ni–Cu loops is observed in lieu of direct contact between the bridges and the $alpha _{1}$ phases. We also observe that the bridges are not perfectly round but ellipsoidal, with the long axis along the connection of two adjacent $alpha _{1}$ phases. The energy-dispersive X-ray spectroscopy line scans of the bridges shows that two types of Cu–Ni-rich bridges exist: those with more Cu than Ni and those with more Ni than Cu. A 3-D model is presented that explains the conditions and process of bridge formation, consistent with the observed composition distributions.]]>5281102494<![CDATA[Dynamic Magnetomechanical Behavior of Tb<sub><italic>x</italic></sub>Dy<sub>1–<italic>x</italic></sub>Fe<sub><italic>y</italic></sub> Alloy Under Small-Signal AC Drive Fields Superposed With Various Bias Fields]]>xDy_{1–x}Fe_{y} plate was developed by mechanical-electrical analogy method. Based on the model, we demonstrated the reasonableness of measuring the small-signal magnetomechanical behaviors by a laser Doppler vibrometer. The strain coefficient of the Tb_{x}Dy_{1–x}Fe_{y} plates was measured as a function of frequency and bias field (, and Young’s modulus, mechanical quality factor (, relative permeability, and magnetomechanical coupling coefficient were investigated as a function of . Many novel characteristics were observed under the drive of a small-signal field (7.96 A/m). The change tendency of the strain coefficient at resonance differs from that at low frequency, and the resonant strain coefficients are significantly high (>85 nm/A) in a wide range of bias field from 4.78 to 55.72 kA/m. Both the negative- and positive- effects are observed, and the negative- effect in the low field range is also remarkable. In particular, sharply decreases from the initial value of 104 to a minimum value of 11.4 and, then, increases slowly, and the ratio of the maximum variation of over to the minimum value of exceeds %. This is an important systematic investigation on the small-signal dynamic magnetomechanical behavior of Tb_{x}Dy_{1–x}Fe_{y}, and the results are highly beneficial to the designing of magnetostrictive devices.]]>52815900<![CDATA[Simulations of Particle Trajectories in Hard Disk Drives Considering the Trapping Criterion]]> for Al_{2}O_{3} particles is developed as the boundary conditions for different colliding surfaces inside a 2.5 in drive. Then, trapping status for Al_{2}O_{3} particles and particles trajectories inside the drive are simulated by using the commercial computational fluid dynamics solver FLUENT with user-defined functions. The results reveal that the particles will travel longer distances until trapped by HDD components when considering the trapping criterion. In addition, smaller particles will more likely degrade the head–disk interface reliability, since they easily stick on the disk surface.]]>528162067<![CDATA[An Acoustic Annoyance Study of Hard Disk Drive for Laptop]]>528193890<![CDATA[High-Speed, Low-Power, and Error-Free Asynchronous Write Circuit for STT-MRAM and Logic]]> mV).]]>52814994<![CDATA[A Tunable Majority Gate-Based Full Adder Using Current-Induced Domain Wall Nanomagnets]]> to 1 mA at temperatures from 298 to 378 K. Finally, the comparison results exhibit 52% and 49% area improvement as well as 41% and 31% improvement in device count complexity over CMOS-based and magnetic tunnel junction-based FA designs, respectively.]]>528172127<![CDATA[Improving Write Performance for STT-MRAM]]>5281112410<![CDATA[Self-Terminated Write-Assist Technique for STT-RAM]]>52816798<![CDATA[Low Power Magnetic Flip-Flop Optimization With FDSOI Technology Boost]]> ), forward body bias (FBB), and poly bias (PB). NVFF reliability can be improved by FBB performance compensation. The perpendicular magnetic anisotropy spin-torque transfer magnetic tunnel junction (MTJ) is used to design the MTJ/MOS hybrid MFFs. Two typical MFF circuits: master-slave MFF and multiplexing sense amplifier-based MFF are implemented and analyzed with the 28 nm FDSOI technology. The simulation results show that the MFFs in the FDSOI technology feature high energy efficiency and enhanced reliability. The energy efficiency of MFF is guaranteed by the proper selection of and FBB voltage. PB is useful for low leakage power design, with the tradeoff of additional sensing delay. The highest PB and the lowest BB transistor configuration lead to large improvements in leakage power consumption.]]>528172018<![CDATA[Magnetic Tensor Sensor for Gradient-Based Localization of Ferrous Object in Geomagnetic Field]]> and position vector of a ferrous/magnetic object in terms of two scalar parameters (an orientation-insensitive and a distance-insensitive derived from the measured magnetic tensor data. These scalar parameters offer an excellent alternative to the traditional ( and in characterizing a magnetic object with an arbitrary shape for some applications when the dipole model is a poor approximation. With a prototype MTS that has been developed and experimentally validated, the effectiveness and accuracy of the gradient-based method are demonstrated with two different types of compact objects. The first object is a uniformly magnetized cylindrical permanent magnet, commonly used as an engineered landmark for machine applications, where the interest is to accurately determine and/or . The second object is an example of a general ferrous object with a non-uniform shape to illustrate the detection and approximate localization of a ferrous object for applications such as visually impaired assistance.]]>5281104241<![CDATA[Differential Measurement With the Balanced Response of Optically Pumped Atomic Magnetometers]]>528191392<![CDATA[Magnetic Transitions in Chemically Synthesized Nanoparticles of CoCr<sub>2</sub>O<sub>4</sub>]]>2O_{4} undergoes a transition from paramagnetic to long-range ferrimagnetic phase at $T_{c}$ (94 K) to a long-range and/or short-range spiral order at $T_{s}$ ($sim 24$ K), and finally shows a lock-in-transition below 15 K. The spiral component induces an electric polarization and also a spontaneous magnetization for which it is said to be multiferroic. Reducing the size of a CoCr_{2}O_{4} multiferroic material to $sim 50$ nm by a coprecipitation method, we obtain a pure cubic phase with space group, Fd3m and lattice parameter (8.334 ± 0.003 °A). A rich sequence of magnetic transitions are examined by measuring temperature and field-dependent magnetization and diffused neutron scattering (DNS) using polarized neutron at different temperatures. While paramagnetic to ferrimagnetic transition is enhanced from 97 K in bulk to 99 K at 0.5 kOe field, followed by a decrease in lock-in-transition ($T_{L}$ ) from 15 K in bulk to 8 K, spiral ordering temperature does not show a significant change. A strong disagreement between paramagnetic moment obtained from the fitting of $chi ^{-1}=({T}/{C})+({1}/{chi _{o}})-({b}/{T-theta })$ and ferrimagnetic moment obtained from the $M$ versus $H$ loop taken at 2 K, nonsaturated magnetization at 50–100 kOe field, two order of magnitude higher coercivity ($H_{c}$ ), and splitting of ac susceptibly confirm the core–shell structure of the particles. Furthermore, a magnetic scattering analysis clearly shows that while the paramagnetic to ferrimagnetic transition is continuous, the spiral ordering is sharp, short range, and commensurate in contrast to incommensurate spiral order observed single crystal of CoCr_{2}O_{4}.]]>528161840<![CDATA[Lorentz Force Transient Response at Finite Magnetic Reynolds Numbers]]> on an electrically conducting rectangular bar that is strongly accelerated in the presence of a localized magnetic field. This is done through numerical simulations utilizing a coupled finite-difference boundary element approach. The results show good qualitative agreement with existing experiments with a circular cylinder. The Lorentz force rise time is seen to be a linear function of . The linear dependence of Lorentz force on is found to be valid only for low values of , after which the slope decays leading to an apparent saturation in the Lorentz force at sufficiently large values of . Our results provide important information for the development of Lorentz force flow meters for transient flow applications.]]>5281112190<![CDATA[Coated-Strand Litz Wire for Multi-Megahertz Frequency Applications]]> ) determination. Three types of pure copper (Cu), silver-coated copper (Ag/Cu), and nickel-coated copper (Ni/Cu) strands are studied in isolation and inside a litz wire. The litz wires associated with these strands are fabricated and their power dissipations are measured. Analytical results followed by finite-element modeling and experimental results show 26% reduction in Ni/Cu litz wire , and 3% reduction in Ag/Cu litz wire at 13.56 MHz compared with same-size Cu litz wire.]]>5281112075<![CDATA[Permanent Magnet Demagnetization Process Considering the Inclination of the Demag Field]]> – curves. This numerical model is combined with an existing finite-element method (FEM) model in which the result of computations is the approximated potential value in the FEM mesh. The aim of this paper was to develop a tool able to simulate the behavior of an anisotropic sintered permanent magnet during the demagnetization process. The permanent magnet material that has been studied in this paper is sintered Nd–Fe–B and it was modeled taking into account an average misalignment angle related to the magnet easy axis. This model also takes into account different demagnetizing field directions, such as a demagnetizing field perpendicular to the orientation direction, which is often ignored. It is shown that even a demagnetizing field perpendicular to the magnetization direction can produce visible demagnetization effects. A Gaussian distribution of the average misalignment angle in the permanent magnet material is also taken into account as well as its variation. Demag curves have been calculated varying the misalignment angle and the intensity and direction of the external magnetic field. The simulation results are in perfect agreement with the law. The model can be applied in many magnetization and magnetic tuning applications.]]>528171613<![CDATA[Estimation of Lorentz Force From Dimensional Analysis: Similarity Solutions and Scaling Laws]]>5281132422<![CDATA[Energy-Preserving Methods and Torque Computation From Energy Balance in Electrical Machine Simulations]]>52818833<![CDATA[Application of Magneto-Quasi-Static Approximation in the Finite Difference Time Domain Method]]>528191424<![CDATA[Error Estimation for Model-Order Reduction of Finite-Element Parametric Problems]]>a posteriori error estimator based on the verification of the constitutive law, which estimates the three different errors. An example of application in magnetostatics with 11 parameters is treated where it is shown how the error estimator can be used to control and to improve the accuracy of the solution of the reduced model.]]>5281101352<![CDATA[A Fully Coupled Framework of Predicting the Dynamic Characteristics of Permanent Magnet Contactor]]>528172215<![CDATA[Explicit Torque and Back EMF Expressions for Slotless Surface Permanent Magnet Machines With Different Magnetization Patterns]]>5281153525<![CDATA[A Novel 6/4 Flux-Switching Permanent Magnet Machine Designed for High-Speed Operations]]>528194469<![CDATA[An Investigation of Zeroth-Order Radial Magnetic Forces in Low-Speed Surface-Mounted Permanent Magnet Machines]]>528161060<![CDATA[Determination of Air-Gap Flux Density Characteristics of Switched Reluctance Machines With Conductor Layout and Slotting Effect]]>528172227<![CDATA[Multi-Objective Optimization of a Transverse Flux Machine With Claw-Pole and Flux-Concentrating Structure]]>5281104148<![CDATA[Monte Carlo Analysis of Circulating Currents in Random-Wound Electrical Machines]]>5281124622<![CDATA[Non-Contact DC Electromagnetic Propulsion by Multipole Transversal Field: Numerical and Experimental Validation]]>5281103696<![CDATA[Impact of Ferrite Shield Properties on the Low-Power Inductive Power Transfer]]>528192725<![CDATA[Electrode Design for Antiparallel Magnetization Alignment in Nanogap Devices]]>52814609<![CDATA[IEEE Magnetics Society Information]]>528C3C385<![CDATA[IEEE Transactions on Magnetics Institutional Listings]]>528C4C4520