New Physics: Sae Mulli (새물리)

Korean Physical Society (한국물리학회)
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Quantitative Approach to the Magnetic Force of a Cylindrical Permanent Magnet Acting on a Ferromagnetic Object

원형 막대자석이 강자성 물체에 작용하는 자기력에 대한 정량적 접근

  • Hyun, Donggeul (Department of Science Education, Teachers' College, Jeju National University) ;
  • Shin, Aekyung (Department of Science Education, Teachers' College, Jeju National University)
  • 현동걸 (제주대학교 교육대학 과학교육과) ;
  • 신애경 (제주대학교 교육대학 과학교육과)
  • Received : 2018.09.11
  • Accepted : 2018.10.29
  • Published : 2018.11.30
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Abstract

The quantitative representation for the magnetic force of a cylindrical permanent magnet acting on a ferromagnetic cylindrical object was derived on the basis of magnetization theories, and the Gilbert and Ampere models of magnetism. The magnetic force derived in this study is directly proportional to the remanent magnetization magnetic field, the cross-sectional area of the permanent magnet, the saturation magnetic field, and the cross-sectional area of the ferromagnetic object and is inversely proportional to the square of the quantity related to the distance between the permanent magnet and the ferromagnetic object. The magnetic forces of an AlNiCoV cylindrical permanent magnet and a Ferrite cylindrical permanent magnet, both with a radius of 0.4 cm and a length of 7 cm, acting on ferromagnetic objects at distances farther than the radius were calculated to be less than 3.6711 N and 0.1857 N, respectively.

원형 막대자석이 강자성 원형 막대 물체에 작용하는 자기력에 대한 정량적인 표현이 자기화 이론, 자기에 대한 Gilbert 모형, Ampere 모형을 바탕으로 유도되었다. 이 연구에서 유도된 자기력은 원형 막대자석의 잔류 자기화 자기장과 단면적, 강자성 원형 막대 물체의 포화자기장과 단면적에 비례하며, 그리고 이들 사이의 거리에 관계되는 양의 제곱에 반비례한다. 반지름 0.4 cm이고 길이 7 cm인 알니코V 원형 막대자석과 페라이트 원형 막대자석이 반지름 이상 거리에 있는 강자성 물체에 작용하는 자기력은 각각 3.6711 N과 0.1857 N 이하로 계산되었다.

Keywords

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