서지주요정보
Grain-oriented 3% Si-Fe 에서 MAE 의 자화자기장의 크기, 주파수와 cutting angle 에 대한 의존성 연구 = The dependence of MAE on the intensity, frequency, and direction of magnetizing field in grain-oriented 3% Si-Fe
서명 / 저자 Grain-oriented 3% Si-Fe 에서 MAE 의 자화자기장의 크기, 주파수와 cutting angle 에 대한 의존성 연구 = The dependence of MAE on the intensity, frequency, and direction of magnetizing field in grain-oriented 3% Si-Fe / 문기석.
저자명 문기석 ; Moon, Ki-Seok
발행사항 [서울 : 한국과학기술원, 1988].
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등록번호

4104747

소장위치/청구기호

학술문화관(문화관) 보존서고

MAP 8810

SMS전송

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초록정보

In the ferromagnetic materials magnetomechanical acoustic emission (MAE) is produced through magnetomechanical coupling between spin motion of domain wall and internal lattice strain when the $180^\circ$ domain wall nucleation and annihilation happen. The rms voltage, V, and the wave form of MAE of grain-oriented 3% Si-Fe polycrystal are measured for 6 values of the angle, Φ, between rolling direction and magnetizing direction with various frequencies and amplitudes. Their 6 values for these measurements are $0^\circ$, $35^\circ$, $45^\circ$, $55^\circ$, $70^\circ$, and $90^\circ$. It is found that the intensity of MAE signal is active at the domain nucleation and annihilaton part in B-H loop. When Φ is increased up to $45^\circ$, the rms voltage decreases, but increasing Φ furthermore it increases and has its maximum value at $Φ=55^\circ$. And increasing Φ furthermore from $55^\circ$, the rms voltage decreases again. The rms voltage increases with increasing of frequency, f, and amplitude, H, of magnetizing field. Also it is found that the specimens with $0^\circ$ and $55^\circ$ which have small $H_c$ (coercive force) have much larger V than others. The experimental result for the expression of rms voltage dependence is 0.13 $(Hf/H_c)^{0.3}$. This result agreeswith the theoretically treated result developed in this work.

서지기타정보

서지기타정보
청구기호 {MAP 8810
형태사항 [ii], 72 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Ki-Seok Moon
지도교수의 한글표기 : 김호철
지도교수의 영문표기 : Ho-Chul Kim
학위논문 학위논문(석사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 71-72
주제 Iron.
Magnetization.
규소. --과학기술용어시소러스
철. --과학기술용어시소러스
자화 특성 측정. --과학기술용어시소러스
Silicon.
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