• Proceedings of the Optical Society of Korea Conference
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• 1997.08a
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• pp.35-35
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• 1997

• Proceedings of the Optical Society of Korea Conference
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• 2002.11a
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• pp.74-75
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• 2002

• Proceedings of the Korean Magnestics Society Conference
• /
• 2016.11a
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• pp.134-135
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• 2016

• Proceedings of the Korean Magnestics Society Conference
• /
• 2014.05a
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• pp.75-76
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• 2014

• Proceedings of the Korean Magnestics Society Conference
• /
• 2013.05a
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• pp.81-82
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• 2013

• Journal of the Korean Magnetics Society
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• v.8 no.5
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• pp.261-269
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• 1998

Induced anisotropy with the energy of $6{\times}10^4\; J/m^3$ is obtained in amorphous Sm-Fe based thin films which are fabricated by rf magnetron sputtering under a magnetic field of 500~600 Oe. Compared with conventional thin films, the anisotropic thin films exhibit a similar "saturation" magnetostriction, but show a very large anisotropy in magnetorstiction which is of significant practical importance due to increased strain at a particular direction. It is shown from a systematic investigation over a wide composition range for binary Sm-Fe alloys that anisotropy is also induced, though small, during a normal sputtering procedure due to the stray field, and the largest anisotropy is observed in the composition range of 25~30 at.% Sm. Furthermore, induced anisotropy is also found to be formed by magnetic annealing, but the anisotropy energy is much smaller than that by magnetic sputtering. This may be because the volume diffusion by which atoms move during magnetic annealing to from induced anisotropy is much slower than the surface diffusion which is expected to be a dominant factor during magnetic sputtering.puttering.

• Proceedings of the Korea Association of Crystal Growth Conference
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• 1997.10a
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• pp.63-67
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• 1997

환원확산법은 저렴한 Nd 산화물을 환원제를 이용하여 환원시키고 환원된 Nd가 Fe, FeB와 확산하여 주상인 Nd$_2$Fe14B가 만들어지는 공정으로 환원제로 사용된 CaO나 미반응 Ca 및 잔존 산소함량을 조절하는데 어려움이 있어 아직까지는 상업되지 못하고 있는 실정이다. 본 연구에서는 환원확산법을 이용하여 Nd-Fe-B계 영구자석에 사용될 미세분말을 제조하고 그 자기적 특성을 관찰하였다.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2023.11a
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• pp.131-132
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• 2023

본 연구는 중대재해처벌법 시행 이후 1년 8개월이 지난 현재까지 사업장의 안전 문제에 대한 사회적 인식 부족을 확인하였다. 2023년 사업장 위험성 평가 지침 개정에도 불구하고, 안전 문화 인식과 참여율 저조가 주요 원인으로 확인되었다. 이를 해결하기 위한 방안으로, 안전 리더십의 강조와 개개인의 셀프 리더십을 통한 자기효능감 향상 방법을 제시하였다. 사업장의 안전 문화 확산을 위한 캠페인의 중요성 또한 강조하였으며, 이를 기반으로 한 안전 문화 확산 전략의 재정립이 요구된다는 결론을 도출하였다.

• Journal of the Korean Magnetics Society
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• v.3 no.4
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• pp.298-304
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• 1993

The effects of the substrate temperature and the Pd underlayer on the structure and the magnetic properties of Pd/Co multilayer films prepared by the thermal evaporation were studied. As the substrate temperature increases up to $150^{\circ}C$, the crystallinity of sublayers, (111) texture and the interface sharpness of Pd/Co multilayers were improved due to the enhanced mobility of adatoms. As results of that, the perpendicular and surface anisotropy energies were increased but the coercivity was decreased because the pinning sites of domain wall decreased due to the grain growth. The grain size of the multilayers increased with Pd underlyer thickness. Thermal degradation was enhanced at above $200^{\circ}C$ due to interdiffusion at the Pd/Co interface. The intensity of the main diffraction peak rapidly decayed in the initial stage of aging and then decreased slowly. The rapid change of the intensity in the initial stage was speculated to be due to the structural relaxation phenomena and the later stage change was due to the interdiffusion. The activation energy for the interdiffusion in Pd4/Co1 multilayers was 14.9 KCal/mole.K.

• Investigative Magnetic Resonance Imaging
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• v.6 no.2
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• pp.107-113
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• 2002