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RISS 인기검색어
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- 저자 : Shuichiro Hashi (검색결과 2 건)
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Jaewon Shin,김성훈,Shuichiro Hashi,KazushiIshiyama 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
Control of the magnetic anisotropy is important for the sensitivity of giant Magnetoimpednace(GMI) magnetic sensors. Our research group proposed an effective magnetic anisotropy controlmethod that uses inverse-magnetostriction and the difference in thermal expansion coefficients. Ifthe proposed method is to be used, an investigation the ratio of the thicknesses between two layers(magnetic and conductive layers) is required because the sensitivity of proposed GMI sensor isdetermined by the ratio. In this paper, we introduce the dependence of magnetic anisotropy on theratio of the thicknesses between the two layers to develop a GMI sensor with a high, and adjustable,sensitivity. The generated magnetic anisotropy (Hk(t)) in the magnetic layer depends on the shapeanisotropy (Hk(s)) and the induced anisotropy (Hk(i)). To control the magnetic anisotropy, wechange the thickness of the magnetic layer. The Hk(s), the Hk(i) and the generated bending stressesare numerically analyzed. In addition, the Hk(t) is obtained experimentally. Based on this study,we found Hk(t) to be inversely proportional to the stress.
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Magnetic Silicone Rubber: Fabrication and Analysis with Applications
Takanori Fukushi,김성훈,Shuichiro Hashi,KazushiIshiyama 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
In this research, we fabricated magnetic silicone rubbers (MSR) by using magnetic powders of Feor Sr ferrite ( 3 - 5 um) and investigated the physical properties of the MSR, such as the elasticand the magnetic characteristics. MSR is a new approach to flexible magnetic actuators. If theMSR is to be solidified, the mixing ratio between a silicone elastomer and the magnetic powdersis important. In addition, the ratio determines the magnetic properties in a magnetic field. If softmagnetic powders are used in the MSR, magnetic force control is possible. We applied MSR to anelectromagnetic linear actuator to verify the capability of MSR based on Fe or Sr ferrite materials. In the linear actuator for inchworm motion, MSR improved the magnetic force and the velocity. MSR can provide a simple mechanism for robotic applications and magnetic artificial muscles.
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