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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Magnetics Society
Journal Basic Information
Journal DOI :
The Korean Magnetics Society
Editor in Chief :
Volume & Issues
Volume 5, Issue 6 - Dec 1995
Volume 5, Issue 5 - Oct 1995
Volume 5, Issue 4 - Aug 1995
Volume 5, Issue 3 - Jun 1995
Volume 5, Issue 2 - Apr 1995
Volume 5, Issue 1 - Feb 1995
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The Effects of Bottom Extremity on the Magnetic Properties of Iron and Cobalt-Iron Electrodeposited Anodic Oxided Films.
Journal of the Korean Magnetics Society, volume 5, issue 6, 1995, Pages 921~927
The micro particle,s shapes of the magnetic films obtained by electrode position of Iron ions and Cobalt-Iron mixed ions in aluminum anodic oxidized films are dependent on the size of particle diameter. When the diameter of deposited particles is larger than
, the film plane anisotropy caused by bottom extremity increases, and the crystalization orientation of FeC deposited unusually in the part of the bottom extremities affects on the coercive force Hc and the magnetic anisotropy energy Ku. It was confirmed that the shape anisotropy of particle affects on the both Hc and Ku because the FeC did not deposit in the Iron deposited samples entirely, but in the Cobalt-Iron alloy deposited samples, the effects by the very strong crystalization orientation of the FeC is larger than that of the shape anisotropy. From these results, the Cobalt-Iron alloyed films could switchover the film plane magnetic anisotropy to the perpendicular magnetic anisotropy energy by using the constrainting method of FeC deposition with Cu deposition instead of Cobalt-Iron alloy in the bottom extremities.
The Processing control of NiCuZn Ferrite (I) - Mixing and Size Reduction of Raw Materials by Wet Ball Milling.
Journal of the Korean Magnetics Society, volume 5, issue 6, 1995, Pages 928~936
In this research, the processing control of NiCuZn Ferrite has been developed. The mixing and the size reduction of raw materials have been proceeded. In order to produce NiCuZn Ferrite, highly concentrated slurry with fixed ratio and wet ball milling were used. First, the dispersion behavior of raw mixture at the region of pH4~pH11 has been studied. Using wet ball milling operation, the best conditions of mixing and size reduction have been determined. Further more, the most suitable conditions, such as, dispersant kind, dispersant amount, milling time, and slurry concentration have been studied. The poly acrylic ammonium salt (PAN) was chosen as a suitable dispersant to have effective dispersion in basic region. The slurry of raw mixture without dispersant, showed high viscosity and poor grindability. As 0.7 wt% of PAN was added, the concentrated slurry (up to 55 vol%) was possible, and showed well grindability. After 18 h ball milling of 30 vol% of mixture slurry with 0.7 wt% of PAN, the average particle size and specific surface area of raw mixture were
, respectively. The ball milled raw mixture, calcined at
for 3h, was totally changed into NiCuZn Ferrite with spinel phase.
The Prodessing Control of NiCuZn Ferrite(II) - The Relationship between Initial Permeability and Bulk Density of NiCuZn Ferrite as Functions of Forming Pressure and Sintering Temperature.
Journal of the Korean Magnetics Society, volume 5, issue 6, 1995, Pages 937~946
In this research, the processing control of NiCuZn Ferrite has been developed. The relationship between initial permeability and bulk density of NiCuZn Ferrite with processing factors was studied. NiCuZn Ferrite, which calcinated at
for 3 hours, was ball milled for about 60 hours to make a size of
followed by granulation using spray dryer. The physical properties and the magnetic properties of NiCuZn Ferrite were investigated with the processing factor, such as (i) granule size and forming pressure, and (ii) sintering temperature. The green density of NiCuZn Ferrite was largely depended on the forming pressure rather than its granule size. The green density of NiCuZn Ferrite was increased from
with increase in forming pressure. The bulk density of NiCuZn Ferrite was increased from
linearly with increase in sintering temperature. The relationship between initial permeability and bulk density of NiCuZn Ferrite was expressed with the empirical equation,
at forming pressure and sintering temperature.
The Electromagnetic Wave Absorption Characteristics of Cu-Ni-Zn Ferrite by Thermal Decomposition of Organic Acid Salt
Journal of the Korean Magnetics Society, volume 5, issue 6, 1995, Pages 947~951
The electromagnetic interference is prevented by the high magnetic loss of the ferrite. The absorbing property of electromagnetic wave could be improved by the ferrite that has a finer and more uniform microstructure. The thermal decomposition of organic acid salt provided the uniform composition and fine powder. The absorbing properties of electromagnetic wave were evaluated by the relative complex permeability, permittivity, and the attenuation which is calculated from the results of network analyzer. The permeability and permittivity were increased with increase of the density and with decrease of the grain size. The matching thickness could be reduced with increasing sintered temperature. The attenuation of the Cu-Ni-Zn ferrite showed over 20dB when the matching thickness and the matching frequency range were 6.75mm and from 160MHz to 640MHz, respectively.
ANOMALOUS HALL EFFECT IN AMORPHOUS
Rhie, K. ; Naugle, D.G. ;
Journal of the Korean Magnetics Society, volume 5, issue 6, 1995, Pages 952~955
It is well kown that the side-jump effect, originated from the spin-orbit scatterring of the transport electrons at the site of spin-orbit scatterers, is the reason for the anomalus Hall resistivity which is proportional to the magnetization. Our recent magnetization study implied that abundant ferromagnetic Fe clusters made of for Fe ions dominate the temperature and field dependence of magnetization at high field and low temperature regime for a paramagnetic
alloy. We measured the Hall resistivity of this alloy and observed that the Hall resistivity followed the M-H cure at low temperature, and the Hall coefficients at moderate temperatures were proportional to the magnetic susceptibility. We explain the behavior of Hall resistivity with the change of field and temperature in terms of side-jump effect.
Preparation and dispersion characteristics of Kerosene-based magnetic fluids with saturated fatty acid
Journal of the Korean Magnetics Society, volume 5, issue 6, 1995, Pages 956~962
Effects of NiFeCo of NiFe Insertion Layers on the Giant Magnetoresistance Behavior of Ni/Cu Artificial Superlattice
Journal of the Korean Magnetics Society, volume 5, issue 6, 1995, Pages 963~967
Ultra thin layers of NiFeCo or NiFe were inserted at the interfaces of Ni and Cu to form a multilayer structure. In case of inserting a NiFe layer, the magnetoresistance was about 6%, the saturation magnetic field was 50 Oe and the hysteresis of R-H (resistance-magnetic field) was very small. In case of inserting a NiFeCo layer, the magnetoresistance increased to about 7% but the saturation magnetic field and hysteresis were also increased. The increase of the output under biased magnetic field was much larger in case of inserting a NiFe layer because of relatively smaller hysteresis in R-H behavior.
Annealing Temperature Dependence of the Spin Wave for Polycrystalline
Journal of the Korean Magnetics Society, volume 5, issue 6, 1995, Pages 968~973
In order to investigate the annealing effect for RF magnetron sputtered
thin films, we have studied the spin wave rehaviors by FMR after annealing the samples at
in air and at
in argon gas for one hour respectively. In FMR spectra for the films annealed in argon gas and the assputtered film at perpendicular resonance, only odd numrer spin waves are observed. But even numrer spin waves are observed for the film annealed in air at
recause of the large difference retween both surface magnetic anisotropy. In the case of the sample annealed at
in argon gas, the spin waves are shifted toward high field, can due to the increase of saturation magnetization during annealing. The spacings retween the spin wave resonance fields are narrowed rapidly, this is thought that the magnetic homogeneity increased in the film after annealing at high temperature.
Pohang Light Source(PLS)용 전자석의 설계, 제작 및 측정
Journal of the Korean Magnetics Society, volume 5, issue 6, 1995, Pages 986~990