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# IEEE Transactions on Magnetics

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Displaying Results 1 - 25 of 290
• ### 5th European Magnetic Materials and Applications Conference (EMMA '93)

Publication Year: 1994
| PDF (1066 KB)
• ### Improvement of readout resolution with an in-plane magnetization film for a magneto-optical disk

Publication Year: 1994, Page(s):232 - 236
Cited by:  Papers (14)
| | PDF (328 KB)

For high density recording of magneto-optical disks, we have developed a new method that improves the apparent optical resolution using a medium that consists of a GdFeCo readout layer and a DyFeCo recording layer. The magnetization of the readout layer is designed to be in-plane at room temperature and to become perpendicularly oriented at high temperatures. Therefore, this medium shows polar Ker... View full abstract»

• ### A microstrip device for the broad band simultaneous measurement of complex permeability and permittivity

Publication Year: 1994, Page(s):224 - 231
Cited by:  Papers (48)
| | PDF (548 KB)

The method presented here aims at determining the complex permeability μ* and permittivity of ε* with an automatic and broad band (45 MHz-18 GHz) system from the reflection-transmission measurement of the S-parameters of a microstrip test device. The complex values ε* and μ* are obtained with the S-parameters from a specific software created within the context of this work. Compare... View full abstract»

• ### A magnetic thin film inductor and its application to a MHz switching dc-dc converter

Publication Year: 1994, Page(s):217 - 223
Cited by:  Papers (74)  |  Patents (1)
| | PDF (448 KB)

The authors propose a novel structured magnetic thin film inductor using rotation magnetization only. The thin film inductor has a sandwich structure, which consists of a double-rectangular spiral coil between top and bottom CoZrNb amorphous thin films. The sputtered CoZrNb amorphous magnetic thin films have uniaxial magnetic anisotropy induced by direct current field annealing. The easy magnetiza... View full abstract»

• ### Low-temperature magnetic ordering and 4f electrons effect in high-T c DyBa2Cu3O7-δ superconducting single crystal

Publication Year: 1994, Page(s):1154 - 1156
| | PDF (196 KB)

The results of differential scanning calorimetry (DSC) from 320 K to 870 K and specific heat measurements from 0.1 K to 2 K are reported. DSC revealed “ortho(P/mmm)-para(P4/nmm)” structural phase transition at 690 K. The λ like anomaly in the specific heat curve at Tm=0.72 K is attributed to the antiferromagnetic ordering of Dy3+ ions and the crystalline fi... View full abstract»

• ### Effect of rolling strain on the loss separation and permeability of lamination steels

Publication Year: 1994, Page(s):212 - 216
Cited by:  Papers (19)
| | PDF (456 KB)

The effect of effective rolling strain, in the range 0-0.147, on the core loss, hysteresis loss, eddy current loss, ac and dc permeabilities of a lamination steel has been investigated. It was found that both core loss and hysteresis loss increased with the square root of strain. However, eddy current loss decreased with increasing square root of strain. Both ac and dc permeabilities are inversely... View full abstract»

• ### Phases interaction and properties of [Bi2Sr2Cu1O6]1-z -[BiOF]z system

Publication Year: 1994, Page(s):1157 - 1159
| | PDF (196 KB)

The [Bi2Sr2Cu1O6]1-z -[BiOF]z solid solutions were prepared by an original many steps solid state reaction method. X-ray studies of samples with different fluorine concentration were carried out. Concentration dependencies of enthalpy, melting temperature and mass change during melting process were studied by DTA method. The influen... View full abstract»

• ### An optimal design of capacitor-driven coilgun

Publication Year: 1994, Page(s):207 - 211
Cited by:  Papers (16)
| | PDF (324 KB)

The paper presents an analysis and optimal design of a capacitor-driven inductive coilgun. An equivalent circuit is used for a launch simulation of the coilgun. The circuit equations are solved together with the equation of motion of the projectile by using the Runge-Kutta method. The numerical results are compared with the experimental values to verify the usefulness of the developed simulation p... View full abstract»

• ### On the origin of magnetic AC susceptibility non-SRT anomalies in intermetallic compounds

Publication Year: 1994, Page(s):577 - 579
Cited by:  Papers (11)
| | PDF (284 KB)

The anomaly detected in the magnetic AC susceptibility of many intermetallic compounds between 100 and 300 K, and in particular in Nd 2Fe14B at 220 K, has been induced in a controlled manner by thermal annealing. The anomaly has been interpreted in terms of thermal activated processes of defects imposing their dynamical behavior on the domain walls coupled to them, thus solvi... View full abstract»

• ### The Hall effect and magnetotransport of UPt in terms of dense Kondo system behavior

Publication Year: 1994, Page(s):1211 - 1213
Cited by:  Papers (1)
| | PDF (184 KB)

Measurements of the Hall effect and magnetoresistance in the U0.52Pt0.48 compound are reported. The temperature and magnetic field variations of these properties are discussed in terms of a competition between the Kondo effect and magnetism. The analysis of previous magnetic, thermodynamic and transport measurements together with the data obtained here allows us to attribute ... View full abstract»

• ### Three-dimensional magnetic ordering in Bi2CuO4

Publication Year: 1994, Page(s):1163 - 1165
Cited by:  Papers (4)
| | PDF (204 KB)

The heat capacity of Bi2CuO4 has been measured from 5 to 350 K in an adiabatic calorimeter. A long range ordering peak was found at 42.7 K due to the establishment of three-dimensional antiferromagnetic order. The magnetic entropy calculated for the anomaly corresponds to the theoretical value for spin 1/2, ΔS=Rln2, discarding the existence of any lower dimensional magn... View full abstract»

• ### Accurate determination of magnetic loss of ferrite material, far from gyroresonance, ΔHeff, in a wide frequency range

Publication Year: 1994, Page(s):196 - 206
| | PDF (680 KB)

The purpose of the presented work is an accurate determination of magnetic loss far from gyromagnetic resonance (ΔHeff), in a wide frequency range using resonant cavities completely or partially filled with magnetic material. The rigorous analytic field expressions are given for any mode of each device. The importance of the relative metallic loss is pointed out and the accuracy o... View full abstract»

• ### Magnetic viscosity of Zn-bonded Sm2Fe17Nx magnets

Publication Year: 1994, Page(s):574 - 576
Cited by:  Papers (6)
| | PDF (208 KB)

The magnetic aftereffect of textured Zn-bonded Sm2Fe 17N2.9 was investigated using the extraction method for fixed external magnetic fields. A simple fitting procedure was developed in order to determine effectively the viscosity S and the correct type of irreversible susceptibility χirr. There is no proportionality in the polarization dependence of ... View full abstract»

• ### Comparison of magnetic coupling between permalloy films separated by Cr for polycrystalline and epitaxially grown structures

Publication Year: 1994, Page(s):800 - 802
| | PDF (260 KB)

Two series of magnetic multilayers consisting of two 600 Å permalloy (Ni83Fe17) layers separated by varying thicknesses of Cr, sandwiched between two further layers of Cr have been studied by spin wave resonance (SWR). One series of samples has polycrystalline layers, and for comparison a second series of epitaxial layers were grown on GaAs(100) substrates. The (100) ep... View full abstract»

• ### Magnetofluid emulsion-new magnetocontrolled media

Publication Year: 1994, Page(s):1090 - 1094
Cited by:  Papers (1)
| | PDF (372 KB)

This study has shown that flow dynamics of emulsion consisting of magnetic and nonmagnetic fluids depends on applied magnetic field. So these emulsions may be considered as a magnetic held controlled medium, and in particular as a magnetic field controlled heat carrier. The new dates on rheological properties of these emulsions in the presence of magnetic field are described View full abstract»

• ### The effects of pole geometry on recording performance of narrow track thin film heads

Publication Year: 1994, Page(s):275 - 280
Cited by:  Papers (13)
| | PDF (452 KB)

The effects of pole trimming on the recording performance of thin film heads is investigated through experiment and modeling. Three dimensional head fields are computed numerically for various pole geometries, and are used by a simple two dimensional recording simulation to determine written width, erase width, read width and isolated pulse response. These parameters are then compared to experimen... View full abstract»

• ### Anisotropic magnetic and transport properties of UNiGe

Publication Year: 1994, Page(s):1214 - 1216
Cited by:  Papers (18)
| | PDF (252 KB)

Magnetism in UNiGe which adopts the orthorhombic TiNiSi type of structure with lattice constants a=700.7 pm, b =423.7 pm, c=720.7 pm is strongly anisotropic. The Curie-Weiss behaviour of the susceptibility above 80 K yields values of Θp equal to -98, 3 and 41 K for the a, b and c axis, respectively. Also the electrical resistivity is anisotropic and reflects magnetic phase transit... View full abstract»

• ### Influence of residual phases on the properties of YBa2Cu 2O7-x

Publication Year: 1994, Page(s):1181 - 1183
Cited by:  Papers (2)
| | PDF (376 KB)

The partial melting in YBaCuO incompletely synthesised powders occurring at temperatures below the peritectic decomposition of the 123 (i.e. YBa2Cu3O7-x) compounds is related to the presence of residual phases. Our results showed that the final ceramic has a high porosity, which is independent of the temperature of sintering, the double grain size distribution and ... View full abstract»

• ### Helical magnetic anisotropy induced by current annealing under torsion in Co-rich amorphous wires

Publication Year: 1994, Page(s):1015 - 1017
Cited by:  Papers (5)
| | PDF (224 KB)

Helical magnetic anistropy induced by current annealing under a constant torisional angle of 2Ox rad/m in two Co-rich amorphous wires with negative and nearly-zero magnetostriction is reported. The measurements were performed using the inverse Wiedemann effect hysteresis loop of the wires. Influence of preannealing on this kind of magnetic anisotropy in both wires is also analysed taking into acco... View full abstract»

• ### Static magnetic properties at low and medium field of gamma-Fe2O3 particles with controlled dispersion

Publication Year: 1994, Page(s):1098 - 1100
Cited by:  Papers (8)
| | PDF (244 KB)

γ-Fe2O3 small particles (⩽10 nm) with various dispersion rates were studied by static magnetic measurements at low and medium applied fields. The results raise various questions concerning the determination of the non-relaxing magnetic moment and of the particle volume, the role of the particle surface and interactions View full abstract»

• ### Core losses estimation in a multiple teeth per stator pole switched reluctance motor

Publication Year: 1994, Page(s):189 - 195
Cited by:  Papers (24)
| | PDF (512 KB)

This paper presents a suitable approach to loss prediction in a multiple-teeth-per-stator-pole switched reluctance motor based upon the conventional core losses equation and taking into account the complicated flux variations in the magnetic circuit. Flux waveform in a part of the stator yoke is measured and used to predict the flux waveforms of the other parts of the magnetic circuit of the motor... View full abstract»

• ### Exchange coupling and energy product in random two-phase aligned magnets

Publication Year: 1994, Page(s):607 - 609
Cited by:  Papers (30)
| | PDF (252 KB)

Size effects in two-phase Boolean magnets composed of an aligned hard phase and a soft phase with high magnetization are investigated. In overcritical' magnets, where the size of the soft regions is larger than the Blochwall width δh of the hard phase, the energy product is reduced compared to the corresponding undercritical' magnets with small soft regions, where theoretical en... View full abstract»

• ### Non-equilibrium gas-phase nitrogenation

Publication Year: 1994, Page(s):571 - 573
Cited by:  Papers (9)
| | PDF (224 KB)

Non-equilibrium nitrogenation of transition-metal rich rare-earth intermetallics can be used to increase the nitrogen content beyond its equilibrium concentration. For example, nitrogenation of Sm2Fe17 using ammonia yields volume expansions up to 8.3 vol.%, which correspond to a composition Sm2Fe17 Nx with x≈4. This effect is related to cat... View full abstract»

• ### Fluctuation effects on the magnetization dynamics below the Curie temperature of ferro- and ferrimagnets

Publication Year: 1994, Page(s):828 - 833
Cited by:  Papers (6)
| | PDF (528 KB)

Measurements of the linear dynamic susceptibility between 1 Hz and 20 GHz are reported for strongly uniaxial and weakly anisotropic cubic model magnets. Approaching Tc from below, the contributions of the homogeneous magnetization and the wall motion have been separated. The most significant effects of critical magnetization fluctuations occur in the wall mobility of uniaxial materials ... View full abstract»

• ### Low-field giant magnetoresistance in Co/Cu, CoFe/Cu and CoNiFe/Cu multilayer systems

Publication Year: 1994, Page(s):358 - 363
Cited by:  Papers (20)
| | PDF (336 KB)

In this paper, methods of increasing the sensitivity of the giant magnetoresistive effect are investigated. These include (111) texturing, topologically reduced coupling and appropriate alloying of Ni, Fe and Co in the magnetic layer View full abstract»

## Aims & Scope

IEEE Transactions on Magnetics publishes research in science and technology related to the basic physics and engineering of magnetism, magnetic materials, applied magnetics, magnetic devices, and magnetic data storage.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Pavel Kabos
National Institute of Standards and Technology