Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Magnetics Society
Journal Basic Information
Journal DOI :
The Korean Magnetics Society
Editor in Chief :
Volume & Issues
Volume 6, Issue 6 - Dec 1996
Volume 6, Issue 5 - Oct 1996
Volume 6, Issue 4 - Aug 1996
Volume 6, Issue 3 - Jun 1996
Volume 6, Issue 2 - Apr 1996
Volume 6, Issue 1 - Feb 1996
Selecting the target year
Magnetic Exchange Coupling at The Interface of MR/TbCo Thin Films
Journal of the Korean Magnetics Society, volume 6, issue 1, 1996, Pages 1~6
To simulate the characteristics of magnetic exchange coupling at the interface of MR/TbCo thin films, the directions of magnetizations were calculated by minimizing energy in the films. Newton method and Gauss-Seidel method were used. The width of M-H curve increased with TbCo anisotropy constant, and with the thickness of the transition region of TbCo layer. Hysteresis loop width became extremely narrow (less than 10 Oe of coercivity), when the TbCo transition region length was
. Also the hysteresis loop of films with low interfacial exchange coupling constant was similiar to that of short transition region length. When interfacial exchange coupling constant was 1/100 of perfect coupling, hysteresis loop showed a coercivity of less than 10 Oe. Comparing the measured hysteresis loop of a fabricated sample with that of simulated one, exchange coupling con¬stant could be estimated.
Composite MIG Head for High Definition VCRs
Journal of the Korean Magnetics Society, volume 6, issue 1, 1996, Pages 7~14
According to demands of high density and wide band magnetic recording systems, a composite MIG head was developed. This head has the sufficient performance for use of a SD VCR : its characteristics are a good recoding performance, a low rubbing noise, a good frequency dependence of efficiency, and a good compatibility with ME tape. In a SD VCR system, the C/N value of a composite MIG head at 20.92MHz was 51 dB.
Study on Exchange Coupling in Bilayer Systems using Co-Based Multilayer Thin Films
Journal of the Korean Magnetics Society, volume 6, issue 1, 1996, Pages 15~20
Effect of Manufacturing Process Conditions on Characteristics of Metal Particle Tape
Journal of the Korean Magnetics Society, volume 6, issue 1, 1996, Pages 21~27
The effects of various manufacturing conditions on the characteristics of metal particle tape using ultra-fine metal powder were investigated. As functions of kneading conditions and milling solid contents. coating thickness, orientation, calender and curing conditions. various properties of the tapes were studied. By the consideration of physical and eletromagnetic properties of the tapes, optimum process conditions were determined. As a result of above investigations, we concluded that manufacturing processes were very important factor in addition to dispersion behavior of particles for achieving maximum properties of the metal particle tape.
Effect of Binders and Additives on Magnetic and Physical Properties of Ultra Fine Metal Particle Tape
Journal of the Korean Magnetics Society, volume 6, issue 1, 1996, Pages 28~35
Dispersion behavior was investigated as functions of species and arrount of addtives, binders, abrasives, lubricants, etc.. Dispersibilityand other various properties were affected by the fuctional groups of binders. Friction coefficient and surface roughness of tape were changed with lubricants, therefore duratility of magnetic tape was varied. As a result of above investigations, we concluded that dispersion behavior of particles was very sensitive for obtaining maximum properties of metal particle tape.
Displacement sensor for Measuring magnetostriction of Amorphous Ribbon
Journal of the Korean Magnetics Society, volume 6, issue 1, 1996, Pages 36~39
We have constructed a disp1acerrent sensor for measuring dynamic magnetostriction of an arrvrphous ribbon under alternating magnetic field using fiber optic Fabry-Perot interferorreter. The signal of the sensor was depen¬dent on the index matching oil and the optical isolator. The resolution of the sensor was
and the measured peak to peak magnetostriction of the amorphous ribbon
Optimal Design of Electropermanent Magnetic Lifter
Journal of the Korean Magnetics Society, volume 6, issue 1, 1996, Pages 40~47
In this paper, the optimal design rrethod of the electropermanent magnetic lifter is proposed. The electromag-netic performances at the states of attraction and release are calculated by the means of the equivalent magnetic circuit rrethod. The magnetic flux flow, the magneto-rrntive force and the aJronnt of lifting force correspond to the electromagnetic performances. As the optimization algorithm, the evolution strategy(ES) is applied for the maximization of the electromagnetic force at the state of attraction and for the minimization of the volume within the alJowable electomagnetic force range. At this rrnrrent, the optimization satisfy the minimization of the electromagnetic force at the state of release. The validity of the proposed optimization rrethod is verified by the comparison between the optimization result and the FEM result (this FEM result is obtained from MAXWELL).
The Design Method of the Torquer in DTG
Journal of the Korean Magnetics Society, volume 6, issue 1, 1996, Pages 48~53
The role of the torquer in dynamically tuned gyroscope (DTG) is to erect the slanted rotor straight. This IBper presents the design method of the torquer. The torquer must satisfy the desired maximum angular velocity condition. The performance of magnet-residual flux density, maximum energy product, and so on-is limited by the material characteristics. So we should design the torquer with the limited condition that magnet performance is given. If the mechanical size of DTG is deter-mined, the dimension of the torquer is calculated and the space of the torquer becomes constant. Therefore, if we determine the diameter of the torquer coil, the number of coil turns is calculated automatically. Using these dimensions, we can calculate the torque and the scale factor. The maximum angular velocity is computed if we know the maximum current density. The analysis of the torquer was carried out by the 3-dimensional finite element method. The proposed algorithm of the torquer design was valid in comparison with the experimental data obtained from fabricated DTG.