• Proceedings of the Korean Magnestics Society Conference
• /
• 2003.06a
• /
• pp.120-121
• /
• 2003

• Journal of the Korean Magnetics Society
• /
• v.17 no.3
• /
• pp.133-136
• /
• 2007

We investigated the changes of the magnetic properties in electroplated Permalloy thin films by a few organic additives added to the plating electrolytes. Under identical electroplating conditions, the crystalline orientations and the surface roughness of the plated thin films were different from those prepared with a pure electrolyte. These property changes reduced the coercivity and increased the magnetoimpedance ratio (MIR) up to 20%.

• Journal of the Korean Magnetics Society
• /
• v.7 no.4
• /
• pp.186-190
• /
• 1997

We measured an anisotropy inhomogeniety and dispersion of rf sputterd permalloy thin films by TBP(Transverse Biased Permeability) measurement method. Angular distribution function had a shape similar to the Lorentzian distribution, but magnitude distribution function deviates from the sysmetric Lorentzian distribution because of long tail to the region of a high Hk value. With increasing film thickness, the angular and magnitude anisotropy dispersion increased. The increase of angular dispersion was due to both the increase of grain size and local anisotropy in thicker films.

• Journal of the Korean Magnetics Society
• /
• v.13 no.5
• /
• pp.211-215
• /
• 2003

We fabricated the synthetic ferrimagnetic layers (SyFL) of permalloy/X (X=Ru, V)/permalloy by varying the X thickness, and investigated the changes of coercivity (H$\sub$c/), spin flopping field (H$\sub$sf/), and saturation magnetization field (H$\sub$s/) with a superconducting quantum interference device (SQUID). We also observed the microstructure with a cross sectional transmission electron microscope (TEM). Permalloy SyFL had less than 10 Oe coercivity, and H$\sub$sf/ and H$\sub$s/ could be tuned by varying ruthenium and vanadium layer thickness. The comparatively small exchange coupling in permalloy-V SyFL was caused by the intermixing of permalloy and vanadium decreasing the effective exchange coupling thickness.

• Journal of the Korean Magnetics Society
• /
• v.10 no.6
• /
• pp.291-296
• /
• 2000

The manufacturing method of permalloy soft magnet with the Ni contents of 46.6 and 47.2 wt% was investigated by powder injection molding technology. The magnetic properties of permalloy were greatly affected on the residual carbon and oxygen content of the sintered magnet. Solvent extraction and thermal debinding process to minimize the residual carbon content in sintered magnet were developed by controlling the debinding atmosphere. The residual carbon content depends on the debinding condition of the binder system for powder injection molding and the residual oxygen content on the sintering atmosphere. The sintered magnet produced by powder injection molding process had a 50 ppm. residual carbon, 150 ppm. residual oxygen. The coercivity and maximum relative permeability of permalloy soft magnet were 0.46 Oe and 14,600 respectively.

• Proceedings of the Korean Magnestics Society Conference
• /
• 1996.10a
• /
• pp.78-79
• /
• 1996

• Proceedings of the Korean Magnestics Society Conference
• /
• 1997.11a
• /
• pp.80-81
• /
• 1997

• Proceedings of the Korean Magnestics Society Conference
• /
• 1997.11a
• /
• pp.82-83
• /
• 1997

• Proceedings of the Korean Magnestics Society Conference
• /
• 1998.10a
• /
• pp.38-39
• /
• 1998

• Proceedings of the Korean Magnestics Society Conference
• /
• 2007.12a
• /
• pp.222-222
• /
• 2007