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一、引言 磁芯是电子计算机上要存貯元件之一。目前这种存貯元件,正向着缩短开关时间,小型化,改善温度系数等方面发展。由于计算机中磁芯的电流脉冲常采用重合法,磁芯在受到-I_m/2的打扰后,剩磁状态应改变很小,动态矩形此(即dv_t/dv_o=K)值越大越好,具有强抗扰性,存取信息容易,这就不但要求材料矩形度α=B_r/B_m高而且还要矩形比R_s=(B-I_m/2)/B_m也要高,同时要求开关速度要快,能使用在较宽的温度范围。为此,我们试制了掺Cd和Zn的Li—Mn铁氧体记忆磁芯,采用φ0.6×0.4mm实验样品。
I. Introduction The magnetic core is one of the components to be stored on an electronic computer. At present, such storage components are being developed to shorten the switching time, miniaturization and improvement of the temperature coefficient. Due to the coincidence law of the current pulse of the magnetic core in the computer, the remanence state of the magnetic core should be changed little after the magnetic core is disturbed by -I_m / 2. The bigger the dynamic rectangle is (ie dv_t / dv_o = K), the better Strong resistance to interference, easy to access information, which not only requires the material rectangular degree α = B_r / B_m high but also rectangular ratio R_s = (B-I_m / 2) / B_m also high, while requiring faster switching speed, Can be used in a wide temperature range. To this end, we have trial-produced Li-Mn ferrite memory core doped Cd and Zn, using φ0.6 × 0.4mm experimental samples.