• Title/Summary/Keyword: 자기이력

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A New Method for Measuring M-H Hysteteresis Loop of a Uniaxially Anisotropic Magnetic Material (일축 이방성 자성체의 M-H 이력 곡선 측정의 새방법)

  • Hur, Jeen;Shin, Sung-Chul
    • Journal of the Korean Magnetics Society
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    • v.5 no.5
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    • pp.900-904
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    • 1995

  • We have developed a new torque magnetometric method for measuring the M-H hysteresis loop of a spheroid-shape magnetic material having a uniaxial anisotropy. Our torque magnetometric method gives the saturation magnetization as well as the remnant magnetization, simultaneously. A torque magnetometer having the torque sensitivity of $10^{-6}$ dyn cm could give the extreamly high sensitivity of $10^{-9}$ emu in measuring the magnetic moment, which is high enough to measure the magnetic moment of a monolayer Ni film. The accuracy of the present method was negligibly affected even at the applied fields near the coercivity where magnetization was inhomogeneous.

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Measurement of AC Hysteresis Loops under Variable Tensile Stress for Amorphous Wire (비정질 세선의 인장응력에 따른 교류자기이력 특성측정)

  • 조희정;양종만;손대락;김구영
    • Journal of the Korean Magnetics Society
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    • v.3 no.1
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    • pp.61-64
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    • 1993

  • We have constructed a hysteresis loop tracer in order to measure the magnetic properties of amorphous wires under variable tensile stress. It has a force range of 0 N to 20 N and a magnetizing frequency of 1 kHz to 20 kHz. Using the ac-hysteresis loop tracer, we can measure the magnetic properties(maximum magnetic induction $B_{max}$, residual magnetic induction $B_{r}$, coercive field strength $H_{c}$, etc.) of amorphous wires with precision of 1% under variable tensile stresses.

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