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MAGNETIC PROPERTIES OF Co - FERRITE FILMS BY SOLID REACTION AT LOW TEMPERATURE
Masafumi CHIBA,Chikao UEMURA,Hiroshi ARIMA,Yoshiharu KOIZUMI 한국자기학회 1995 韓國磁氣學會誌 Vol.5 No.5
Co-ferrite (CoO-Fe₂O₃) thin films have been prepared by two ways of low temperature solid reaction including oxidation process, being based on Co-layer/α-Fe₂O₃ films and Co-layer/Fe₂O₃ films. Magnetic properties of both Co-ferrite films have been measured and compared. The samples from Co-layer/Fe₃O₄ films have a large coercive force in the direction perpendicular and have a great poler kerr rotation angle at wavelength 700 ㎚ than ones from Co-layer/α-Fe₂O₃ films. The typical magnetic properties are as follows; saturation magnetization 4πMs, 2.9 kG; remnant magnetization 4πMr, 2.0 kG; coercive force Hc, 4.0 kOe; kerr rotation angle Φk, 0.39 deg (λ = 700 ㎚); and initial magnetization energy E, 3.3×10^6 erg/㎤, respectively.