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Effect of sintering on the magnetism and magnetoresistance of La1/3Nd1/3Ca1/3MnO3

Guoqing LI , Lijie HAO , Ze XIANYU , Deren LI , Ke SUN , Halving LI

材料科学技术(英文)

Perovskite-like bulk La1/3Nd1/3Ca1/3MnO3 is prepared by solid phase reaction method. The temperature dependence of the magnetization and the relationship between CMR effect and sintering have been studied. The CMR is up to 673.9% under 1 T applied magnetic field and 100 K temperature, and that also reaches 93.5% in 0.2 T and 100 K.

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Studies on the relation between the composition of thermal sensitive MnZn ferrite and curie temperature

Mengkui WANG , Junyue WANG , Ke SUN

材料科学技术(英文)

Thermal sensitive MnZn ferrite is a kind of soft magnetic ferrite material with lower Curie temperature (T-C) and can be used to make many kinds of magnetic thermal sensitive sensors with high sensitivity. In this paper, the relation between the composition of thermal sensitive ferrite and T-C was studied. It was found that T-C changes linearly with ZnO extent when the content of Fe2O3 is fixed. Based on lots of experiments, an experimential formula to determine T-C was given out.

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